THE LIBRARY OF THE UNIVERSITY OF CALIFORNIA LOS ANGELES RESULTS ASTRONOMICAL OBSERVATIONS MADE AT THK SYDNEY OBSERVATORY, ' NEW SOUTH WALES, IN THE YBARS 1877 AND 1878, UNDER THE DIRECTION OF H. C. RUSSELL, B.A., F.R.A.S., GOVERNMENT ASTRONOMER FOR NEW SOUTH WALES. $ixblishet) bv authority of g)er <|ttajcstji's obcrnmcnt in <^cto South SYDNEY: THOMAS RICHARDS, GOVERNMENT PRINTER. 1881. 5c 581 ngi Mathematical Science* Library INTRODUCTION. IN the first volume of observations published by the Sydney Observatory will be found a description of the building and instruments in use at that time ; but since then the former has been much enlarged, and the latter replaced by new and larger instruments. It seems therefore desirable to give in this first volume of observations made with new instruments some account of them and the building, so far at least as they affect the observations in this volume. The description of the large equatorial will be found in the volume of transit of Venus results, and those of the meteorological instruments scattered through the annual volumes, but principally in 1873-1878, and 1879. SITUATION. The site of the Observatory is the best that could have been chosen in Sydney, placed as it is on one of the many headlands projecting into the harbour ; it is for that reason on the outskirts of the city, on the north side, and but few buildings can ever be made between it and the water, which surrounds it on three sides, east, west, and north ; fortunately also it is on these sides that the prevailing winds blow, so driving away the smoke of the city, which lies to the south and south-east. It will be seen in the map that the building is placed on the highest land of and near the centre of Flagstaff Hill Reserve, which has an area of 10 acres, and is planted with ornamental trees, and surrounded with stone wall and iron fence. The main floor is 152 feet above the mean sea-level, and the time-ball 61 feet above this, or 213 feet, which is high enough to be visible from the greater part of the harbour and city. The hill is solid sandstone, and affords therefore an admirable foundation. 5c 581 2 Introduction. PERSONAL ESTABLISHMENT. The personal establishment of the Observatory in 1877 con- sisted of Mr. H. A. Lenehan, Astronomical Assistant. Mr. E. G. Savage, Meteorological Assistant. Mr. P. M. Blaclen, in charge of Weather Map. In 1878 this was increased by the employment of Mr. L. Hargrave as extra Observer. The duties of the Observatory have been distributed in the following manner : The Government Astronomer has taken the full direction and superintendence, together with the work of the large equatorial and all the correspondence. Mr. Lenehan has general charge of the transit observations with their complete reduction, and all time signals. Mr. Hargrave is charged with the examination of astro- nomical work, the computation of double star observations, and the work with No. 2 equatorial, together with some meteorological work. Mr. Savage has charge of the reduction of the meteoro- logical returns from country stations, and in part with the preparation of the daily weather map. Mr. Bladen has charge of the meteorological observations at Sydney, and the daily preparation of the weather map. BUILDINGS. The photograph will give a better idea of the building than it would be possible to give here ; suffice it to say that it is a good stone building. The eastern and southern sides of the quadrangle were built in 1856-7 and the western side (not seen, except part of the second dome) was built in 1877 ; this was a much needed extension, giving seven ad- ditional rooms, and a second dome which was placed so that from it that portion of the eastern heavens which the time- ball tower hides from the old equatorial room can be surveyed. Introduction. 3 The instrument mounted here is the fine 7 \ -inch Mery re- fractor, which was described in vol. for 1862 ; the old dome was described in the 1860 vol. In 1874 the old 18-feet dome was removed and a new one put in its place, to cover the 11^-inch equatorial. It is 22 feet in diameter, or as large as it could be made on the old walls. It is made of 26-ounce muntz metal or brass, and has no supporting ribs except two put on as guides for the shutters. In the course of con- struction each sheet was cut of the shape required for its position and then riveted in its place ; the edges lapped one inch, and the rivets are 1J inch apart. The opening for observations is two feet wide, and is covered with three sliding shutters and one on hinges at the bottom; these are so proportioned that any point from the horizon to the zenith can be seen. At the bottom it has a groove of cast-iron, and on the top of the wall is a similar groove. The radius of these grooves is somewhat greater than that of the five balls which roll between ; this allows a little side motion, and makes the dome revolve easily so easily indeed that when once in motion a good push will send it half a revolution. The new dome, 18 feet in diameter, is constructed in exactly the same way, but more care was taken in preparing the cast-iron groove and it works almost too freely, for it sometimes turns under the influence of the wind. On the ground floor the building contains entrance hall, meteorological computing room, 15 X 15 ; type room, 9 X 12 ; transit room, 24 X 16 ; Astronomer's room, 24 X 16 ; helio- graph room in base of large tower ; spectroscope room in base of north tower. Partly underground are four rooms, making a standard bar room, printing room, magnetograph room* and store. Above the ground floor photographic room, instrument store room, and three computing rooms. There are besides * The magnetograph room is below the transit room and the instrument ; a photographic one cannot now be used owing to the quantity of iron about the new transit instrument. 4 Introduction. the two dome rooms and four rooms in the time-ball tower, the magnet house, a detached building on the north side, a carpenter's shop, and an instrument shop in a detached stone building. INSTRUMENTS. The telescope has an object-glass of 6^ inches, of which only 6 inches is clear ; its focal length is 85 inches. Its tube is made of two cones of wrought brass made as light as was consistent with strength ; the fittings of the object-glass and eye-piece are also as light as possible, and the large end of the cone, where it is attached to the axis cube, is turned under the ring of brass by means of which it is fixed to the axis. These precautions against flexure were taken at my request by Mr. Simms, with what effect will appear in another part of this introduction. The axis is of gun-metal, and the central cube 13 inches on each side ; the two cones are perfectly symmetrical both in outside form and in the inside strengthening braces, all being one splendid casting. So careful was Mr. Simms, that a first casting, which revealed a slight flaw when nearly finished was rejected, in order to secure one that was perfect. The bearings are steel cylinders 3^ inches in diameter (outside), turned to fit perfectly into the end of the gun-metal, and fixed by shrinking on the end of the gun-metal a steel ring half -inch thick and one inch wide ; this has effectually fixed the steel bearings without the use of solder, which has more than once been found very unsatisfactory for this purpose. The circles are discs of cast brass, supported on the back by radial arms ; they are in fact exact copies in form of the splendid dividing engine circle in Mr. Simms's possession. This form was adopted so that the metal might flow evenly in the casting ; and a disc without radial supports would have been chosen, but Mr. Simms could not guarantee that it would not twist after it was finished. The diameter is two SYDNEY TRANSIT INSTRUMENT AND REVERSER. Introduction. 5 feet, and the graduations on silver are to five minutes ; both circles are exactly alike, but one is fixed and the other may be turned on the axis at pleasure for the purpose of testing. This circle, however which is marked A is not quite so good as B. The latter is very nearly, if not quite perfect, judged from a practical point of view. The piers of the telescope are of cast-iron, both exactly alike and hollow ; at the top they measure 10 in. X 11 in., and at the base where they rest on the stone 23 in. X 33 in. ; the form will be seen in the photo. ; the inner side is straight from top to bottom, while the other three sides spread out towards the base. The counterpoise levers are hidden partly in the piers, but in the photo, part of the one on the distant pier can be seen, and the stage was removed from the near pier to show one of the weights. Prom these levers rise the two rods carrying each a pair of friction rollers. The levers have adjustable weights, and only about 7 Ibs. is left upon each Y. The Ys have brass bearings, which form parts of a cylinder, and are not provided with motion either in level or azimuth, making it difficult to set the piers in the first instance, but very satisfactory when once done. A grinding tool the exact counterpart of the axis at its ends was supplied with the instrument, and with this a minute final adjustment is possible. Close fitting card- board covers keep dust out of the bearings. On the top of the piers a circle 21 inches in diameter is placed to carry the microscopes (see photo.) ; it is provided with screw motions not visible in photo., so that the axis can be made to coincide with the telescope axis. When this is done it is easy to place the microscopes 90 apart. Through the centre of this circle there is a hole 5-| inches in diameter, which serves to admit light into the telescope for the wires, and on to four prisms which throw the light on to four others, and these on to the circle at points under each microscope. 6 Introduction. The microscopes are 21 inches long, are graduated to seconds, and magnify 60 diameters. A reading pointer is provided on the same circle as the microscopes ; it is of low power, and is most convenient for reading degrees and 5-minute spaces. The gas-light for this instrument is enclosed in a lamp with a large bull's-eye, and stands 5 ft. 4 in. from the end of the axis, and has no appreciable heating effect upon the metal. (See photo.) The collirnation micrometer has a head divided in the ordinary way into 100, and a second head on the same axis also divided into 100 for the purpose of counting the revolutions. This is effected by a series of wheels hidden from view, and so proportioned that 100 turns of the screw turn the counter-head one revolution. This arrangement was supplied by Mr. Simms, and is a more convenient one than having a comb-counter for the revolutions. The head of this micrometer is protected by a small brass box which effectually shields it from being accidentally moved, while the pointer can be seen without removing it. Mr. Sirnms provided the instrument with three sets of five wires. These were removed and a set of seven inserted the intervals being about 5 seconds for an equatorial star. With this interval it is possible to observe by eye and chronograph, or by ear, and too much time is not lost when observing by eye and ear. (See page 13.) The declination micrometer has only one wire, and is fitted with head-counter similar to that on the collimation micrometer. For the purpose of observing Mars a second wire was put in 19"'6S from the zero wire, but as it was found to be somewhat in the way when taking the nadir readings it was removed. By means of two multiple-threaded screws the eye-piece can be moved rapidly across the whole field, both in H.A. and declination, and all the eye-pieces, including that for the Introduction. 7 reflection observations, fit into the same slide ; the powers are 100 and 145, the 145 being always used for star work, and a second one of 100 fitted with green shade before and variable red one near the eye is used for observing the sun, for which purpose the aperture is generally reduced to 3 inches. By means of a handle near the eye-piece the observer can in a moment change from bright-field to bright wires, or the reverse. This is provided for by means of a reflector and four prisms, two being near the wires, and two attached to the reflector. The eye-piece for reflection observations is 6 inches long, but gives very fine definition of the wire and its shadow. There are two setting circles seven inches in diameter, one on each side of the tube near the eye-piece. The electrical key is not attached to the eye-piece, but to the west pier, from which it hangs by a long spiral of insulated wire, and the observer takes it in his hand when about tp observe. The spiral is sufficiently long to prevent any strain being put on the pier when the observer is using the key, and the possibility of side strain on the telescope which might arise from having the key attached to it is obviously avoided. The method is found very convenient in practice, and is not liable to be put out of circuit by dust, as contact by means of springs on the axis is apt to be. In the photo, and 011 the north side of the transit will be seen the reverser on the tramway by which it is run under the instrument. It will be seen that a small wooden stage is upon the Ys made to support the telescope ; this is for convenience of standing on when observing the nadir placed north and south ; when used for lifting the telescope it is of course placed east and west, and the platform removed. The lamp-stand will also be seen attached to the reverser; this is of course movable. To lift the telescope the handle has to be turned, and that turns a screw nut by which the in- strument is raised. It is very easily done, and being a screw 8 Introduction. lift no slip or jerk can take place. When up the transit can he reversed very easily, and a guide-pin obliges it to come down exactly 180 from the position in which it was lifted. The tramway runs into a recess in the wall, and when not in use the reverser is run into this recess and the door closed flush with the wall. Under the telescope, in a small recess in the stone hase, is the mercury trough ; it was purposely uncovered at the time the photo, was taken. The observing chair is shown raised at the south end, hut either end may be raised, and between the chair and the pier may be seen a straight rod by means of which the chrono- graph tape may be started or stopped. On the telescope tube may be seen three out of four ivory knobs, which were put on for the purpose of taking hold of when the instrument has to be moved, so that the heat of the hands may not affect the brass. COLLIMATORS. The north collimator is a telescope of 2} in. aperture and 33-inch focus, fixed on a very massive sandstone pier outside the building ; the pier is painted. The south collimator is a 4-inch lens of 43 feet focus fixed into the south wall of the building. In the focus of this is a plate of silver with two small crosses engraved upon it. % CLOCKS. The transit clock was made by Prodsham for the Observa- tory ; the workmanship is good, but it has never kept such perfect time as it was hoped it would. This became more evident when tried by a better transit instrument, and in 1877 I placed it in Mr. Allerding's hands for a thorough examination. A slight fault was found on one of the pallets and polished out, and one or two minor repairs effected which made a decided improvement in the clock's rate. It was Introduction. 9 found also that a steadier rate was maintained if the electrical contact was left constantly at work. This contact is of the tilt-hammer form ; that is, a wheel of 60 teeth is fixed on the escape-wheel axis and a light lever rests against this wheel ; as the wheel moves second by second the end of the lever passes up into the spaces between the teeth and the other end falls on a point and makes contact ; one space on the wheel is filled up so that there are only fifty -nine contacts for each minute. Adjustment is provided for the duration of contact, and in practice a contact of less than a 20th of a second is not safe unless a very strong battery is used. The mean time clock is by Grimaldi, and although old is much better made than the modern one. At present it has too many duties to perform, but the rate is nevertheless small and is always a losing one. A weight having free motion on the pendulum rod rests on the bob, and can be lifted by a string passing over a wheel level with the spring ; when it is raised the clock gains Is. in three minutes, and by means of this the clock is corrected every day at 12h. 30m. for any error. It is provided also with an electric contact like that in the transit clock, and every day from 12h. 45m. to 12h. 50m. it beats seconds on the telegraph line to Newcastle (100 miles by wire), and the person in charge of the time-ball there receives the ticks on his chronograph side by side with those of his clock, and when the two coincide he disconnects, and puts down the adjusting weight in his clock, which is then ready to drop the ball ; this it does in the same way as the Sydney clock. The mean time clock is also provided with a wheel on the minute hand axis in which are two nicks ; on this wheel rests a tilt-hammer, and as soon as the hands of the clock point to 53m. 30s. one of these nicks allows the tilt-hammer to fall and make circuit for two minutes, when it lifts the lever and at 59m. 30s. another nick allows it to drop and make contact again ; these contacts are, however, only part of the arrange- ment for dropping the ball ; there is a similar wheel on the 10 -In troduction . seconds hand axis and a similar lever, and when the second hand falls on 60s. a nick in tho wheel allows the lever to fall and make contact ; this of course takes place every minute, but the circuit can only be completed through the two levers, and therefore only at 54 and 55 minutes and at the complete hour. The first signal serves as a warning to the man who winds up the ball, and at the 55m. one he begins to wind up. A third duty the clock has to perform, and that is to make a contact every hour for the barograph, so that the hour lines are ruled in exactly and by the same pen which records the height of the barometer. This clock with the two chronographs, one on each side, is represented in the third photo, print, and standing by the side of it will be seen the telescope with micrometer, &c., sup- plied by Mr. Simms, for testing the pivots. The photo, is not very good, but owing to the size of the room and the various difficulties in the photographer's way, it was only possible to take it with a lens of very short focus even then part of the transit microscope shows. There is some distortion at the margins, but it serves to show the general appearance and arrangement of the chronographs and mean time clock. CHRONOGRAPHS. One of these is by Siemens, and has a fairly uniform motion under the control of his expanding fly ; the paper moves 0'75in. per second between two rollers. There are two pens provided with tilt points so that the paper is punctured but not stopped or torn when it is marked. This chrono- graph can be started or stopped by a convenient handle within reach of the observer, or at the instrument. After the error of the transit clock has been found by observation, it is made to beat on this chronograph for about a minute at noon ; and the noon signal from the mean time clock is also received on the paper ; the exact comparison of Introduction. 11 the clocks is therefore obtained free from personal equation. All the clock signals can by a commutator be made to pass through this chronograph on to the telegraph lines, so that any required signals can be sent without using the hand to repeat them, and a galvanometer in circuit shows whether they are going correctly. This is found very convenient for many purposes, but especially for determining longitudes of trigonometrical stations. The other is a barrel chronograph. On this the paper moves ^-inch to the second, and a sheet of paper 30 inches by 16 inches lasts two hours five minutes, and a new sheet can be put on in one minute. Perfectly uniform motion is obtained by means of four pendulums, each of which is attached (see photo.) by means of a connecting rod, with a point of variable eccentricity in the last wheel of the train. The eifect is that, if the driving weight is increased, the amount of eccentricity of the variable point increases with the increasing arcs of the pendulums. Points projecting below two of the four pendulums work in mercury, and are so adjusted that the driving weight may be doubled with- out making any change in the rate. This clock is only temporary, being an adaptation of the idea which Mr. Barra- claugh, of Sydney, first introduced, viz. the possibility of obtaining uniform rotary from the oscillating motion of pendulums. In this plan the uniformity is not theoretically perfect, although it is so practically. A clock is now being made for this chronograph, which is intended to fulfil the theoretical condition of perfectly uniform rotary motion. OBSERVATIONS. During 1877 and 1878, the period embraced in this volume, observations with the transit instrument have been almost confined to the fixed stars and the regular observation of the sun for time purposes, but the sun observations have not been included here. Nearly all the observations of the planet Mars and stars were made by myself ; the other observations 12 Introduction. have been made by Mr. Lenehan while I have been engaged with the equatorial. It has not been deemed necessary to incur the expense of printing the observations in full, but two manuscript copies are carefully preserved, and may be referred to in any case of doubt. In order, however, to avoid the necessity for this, after the observations had all been carefully computed and examined by a second person, the daily results as arranged for publication were compared inter se, and any doubtful positions again computed. The various instrumental errors have been determined as follows : INSTRUMENTAL ERRORS. The collimation error. This is taken every morning after observations, but the changes are very small. The telescope cube is pierced with two holes, which, after the telescope is set vertical, are opened, and then five readings of the north collimator on the south collimator cross are taken on each side, and the screw set at the mean. The telescope is then turned on the north collimator, and five readings on each side of the collimator are taken. The same is done on the south collimator, and the mean of the twenty readings corrected for diurnal aberration is taken as the collimation reading, and the micrometer set to this, so that no correction for collimation is applied to the observations. The level error is obtained by means of Bohnenberger's eye-piece. Observations are taken from mercury resting in a copper trough, on Professor Pritchard's plan, which is found to answer admirably, for now there is seldom sufficient vibration to prevent its use, while with the old mercury trough it was difficult to find it sufficiently free for our pur- pose. Ten readings are always taken, five on each side, and the difference between the mean of these and the collimation reading gives the level error. Level error is taken with every set of stars. For the purpose of reading the level and nadir, steps and a movable top have been added to the Introduction. 13 reversing apparatus, as well as a stand for the lamp, so that it may be kept at some distance from the telescope. As the reverser is upon wheels, it is provided with a brake, which is turned on when the stand is required for reflection readings. The azimuth error was obtained from star transits in the usual manner, using the Nautical Almanac positions with their final corrections. The perpendicularity of the transit wires was secured by adjusting the eye-piece tube until every part of the middle wire would bisect the wire in the north collimator. For the application of the errors of collimation level and azimuth, two carefully made brass sliding scales have been provided ; with these the error for the day being set at the zero of the scale, the quantity to apply is found opposite the star's declination. The interval between each wire and wire iv was deter- mined by means of the E/.A. micrometer, each wire being made to bisect the wire of the north collimator. Five sets of readings were taken with the following result, the micrometer head being on the west side : I. II. III. V. VI. VII. + 14 a -619 +9-954 +5-043 -4-792 -9748 -14-589 and the mean of the seven wires required a correction of +0-069 to wire iv. In June, 1878, a new set of wires was put in and the intervals determined by five transits of Sigma Octantis over each wire with the following result : I. II. II. V. VI. VIIL + 14-628 + 9-982 + 5-041 - 4-743 - 9-694 - 14-518 The mean of the seven being -|- '099 from wire iv. When a star has been observed on less than seven wires the mean for those observed is taken and a correction found by adding together the equatorial values of the wires observed ; dividing the sum by their number and multiplying the quotient by the secant of the star's declination. 14 Introduction. After these corrections have heen applied, the clock error is determined from the Nautical Almanac stars, which are always observed for the purpose, and the error of the clock for each star transit thence computed and applied. A correction for the fraction of the year is then applied to reduce to observations to January, O d . For B.A.C. stars the a.b.c.d. numbers have been taken from that catalogue and combined with the A.B.C.D. numbers from the Nautical Almanac ; for other stars the a.b.c.d. numbers have been computed by means of the formula given in the Nautical Almanac. In the few cases of double stars the same correc- tions have been used for each component. ZENITH DISTANCE OBSERVATIONS. Mode of observation : When the star comes into the field, it is brought just above the horizontal wire, and as soon as it is past the middle wire it is bisected by moving the micro- meter screw, or on rare occasions by the tangent screw of the circle. If five seconds elapse before bisection a correction for curvature of path is applied, but not for shorter intervals unless the star be near the pole. The pointer of the circle is read first, and then the four microscopes IF. (r. H.I. always in the same order, and then the declination micrometer ; all these observations are written at the time in a note-book. No weights are assigned to the observations, but if it appears at the time that an observation is bad it is rejected, and observations for positions are avoided on nights of bad definition. The value of the declination micrometer was found by means of the collimators and the circle ; the interval of ten revolutions was measured twice on the south collimator, giving a mean of 48"'918, and three times on the north col- limator, giving a mean of 48"' 887 ; the mean of these is 48"'902 ; 48"'900 was the value adopted. Introduction. 15 FLEXURE. Observations for the purpose of determining the flexure by means of the collimators were made with the following results : // February 14 28 March 2 2 at night 3 at night 1485 1-460 1-855 1-260 1-820 Mean 1-576 No correction for flexure has been applied to the ob- servations. THE NADIR READINGS. The nadir is found by looking into the mercury trough in the same way as for the level and generally at the same time. Five contacts of the wires on each side give a mean which is taken as that for the nadir. Many experiments have been made to see if the direction in which the telescope was turned affected the nadir and for a time there seemed to be reason to suppose that it did, but this subsequently disappeared and only one reading is taken with each set of stars. CORRECTION FOR CURVATURE. The correction to be applied for curvature is computed by means of the formula n3p ^ in r/ X tan. declination, where n represents the number of intervals from the middle wire, and D the value of one interval in seconds of arc. Corrections for refraction have been computed by means of Bessell's tables as modified and expanded in the Green- wich Observations, 1853, Appendix. The barometer results are obtained for the times from the barograph which is in the transit room, and the external thermometer is read at corresponding intervals. ARRANGEMENT OF RESULTS. This requires but little explanation, since it is similar to that usually adopted, with the exception that the mean E/.A.'s and N.P.D.'s have been arranged side by side, so that one opening of the book shows all the observations of any star; this arrangement seemed more convenient than having the two positions in separate parts of the volume. The correction 16 Introduction. applied to reduce each observation from date to January 1st is given, as is also the mean of all 'the results for each star and its tabular position. This for Nautical Almanac stars is obtained from the table of mean places of stars, pages 290 to 293. For B. A. C. stars it is the position there given, brought up to date, by means of the precession and proper motion. THE ANNUAL CATALOGUES. The stars are here arranged in order of H.A. with refer- ence number and star's name, the magnitude number of observations fraction of the year corresponding to the mean of the times of observation. The mean E.A. brought up to January 1st and the precession computed by means of the formulae p. = T v (m + n sin. KA. cot. KP.D.) p 1 = - n cos. R.A. Where p= precession in Eight Ascension, and p 1 in North Polar Distance, and m. and n. Professor Peters' quantities computed to date. The N.P.D. observations are arranged like those in R.A. POSITION OF THE OBSERVATORY. Longitude. Eor the purpose of determining the longitude moon cul- minations alone have been employed. The following table gives the computed seconds for each year's observations, it being understood that lOh. 4m. stands before each result. For 1863 the mean of all the first limb s. observations is ... ... ... ... 50*40 ,, ,, second ,, 50-65 1871 first 50-98 second 50*82 1872 first 50-67 second 51-45 1873 first 51-18 second 50'97 1874 first 50-22 second 50'80 Mean .. . 50*812 Introduction. 17 It is evident therefore that observations of first and second limbs are of about equal value. lOh. 4m. 50'81s. is the adopted value of the longitude. If however strictly equal weights be given to all observations of the first and second limbs, the mean becomes 50 '69. A word of explanation as to the interval 1863 to 1871. In 1863 I was temporarily in charge of the Observatory, and from the beginning of 1864 to near the end of 1870 Mr. Smalley was director of the Observatory. I have based this determination of the longitude on my own observations only. LONGITUDE OP SYDNEY. From Moon culminations. The Moon's R. A. being corrected by observations made at Greenwich on the same dates. Date. ic "= J Its' 11+ 1 '~ y. Date. jj Limb. No. of comp. Stars 1 Date. 1 rfj ~ s No. of comp. Stars. 1 Date. Ii jj CO i! 3| 1863. 8. 1871. s. 1872. s. 1874. s. Aprils 50-61 1 Jan. 3 48-08 1 2 Feb. 19 55-44 1 2 Jan. 1 47-45 1 27 46-00 1 Mar. 1 60-07 1 1 27 43-24 2 2 2 49-19 ] 29 49-95 2 10 47-63 2 1 Mar.22 ' 40'94 1 2 Feb. 27 1 47-59 2 May 2 55-72 2 May 3 52-11 2 2 26 1 59-67 2 2 June 23 55'20 2 4 49-76 2 5 47-69 2 2 May 21 50-83 1 25 51-89 1 5 49-89 2 26 6001 1 2 June 14 63-08 2 29 48-91 2 6 52-43 2 June 2 50-22 1 2 Nov.14 43-73 1 July 23 56-77 2 25 45-05 2 ,, 3 49-57 2' 2 Dec. 14 50-01 1 ., 24 48-51 1 ,, 27 41-43 1 ,. 10 5338 2 2 1873. 26 48-21 1 28 42-79 2 26 48-97 l! 2 Feb. 6 51-75 2 Aug.22 49-05 1 29 55-05 2 27 48-52 1 2 Apr. 4 46-54 1 Oct. 19 51-15 2 30 48-56 2 29 49-23 1 2 10 i 55-25 2 27 51-01 2 2 June 30 51-10 2 July2 5 44-89 1 1 May 18 52-30 1 Nov.19 46-85 1 2 July 1 54-36 2 28 53-20 1 1 June 2 52-01 1 20 52-64 1 2 2 51-68 2 29 50-25 1 2 3 4403 2 21 49-69 1 2 28 49-39 2 31 53-85 1 1 7 47-84 2 28 50-60 2 1 29 50-21 2 Aug. 1 48-21 1 2 8 55-07 1 Aug. 3 47-39 2 3 54-77 2 2 ,, 10 51-12 2 2 5 48-80 1 25 52-29 1 1 Aug. 5 55-65 1 8 25 56-32 2 ,, 26 45-55 1 2 7 52-50 1 2 26 55-98 2 28 47-45 1 2 Oct. 6 49-48 2 2 28 46-75 1 2 Scpt.25 47-03 1 1 Sept. 3 53-39 2 2 4 52-34 2 2 25 53-69 1 2 Oct. 21 51-28 1 2 26 52-75 1 2 29 48-14 2 2 30 45-45 2 2 Nov.20 55-01 1 2 25 54-73 2 2 18 Introduction. Latitude. In this volume the value of the latitude 33 51' 41'1" used in previous volumes has been retained, because the observa- tions and examination of the circle for final determination of the latitude are not yet completed. The following comparative table of the positions of stars for 1878 will indicate what degree of merit may be given to the Sydney observations. The stars have been arranged in order of N.P.D., and all have been reduced to the same epoch ; sixty were selected that had been observed at Wash- ington, Melbourne, the Cape, and Sydney ; and the Nautical Almanac position is also given. The agreement between the R. A.'s. as observed at Sydney is satisfactory, but it is quite evident that a correction to the latitude of Sydney has yet to be made : if determined from the Nautical Almanac it would be 0'790"; if from the mean of the three other Observatories, 1-352". Introduction. 19 1 i i b I 'So S S 5 S 5 S S * * r* r 1 * w S 5 S 3 IH S 8 5 OD IH 8.8 8 5 S ? S j 1 isi II i (N 4? tO CO C 1 ! *O (J5 O O C^l 00 LO 00 O *O O * I O X 1 SC 02' Jfi O *; "^'f a a o g d a> o fcC P^C3 ,= & r-t r4 i& -Sp*fcppr>- 4 {2*!e!C5COrHcbob- ; *ao US iH (N 10 (M rH 8 : Hoo(:'5CDt^O-*-^ l CD?--t^^t^OOr-l'f'C^^' l Introduction. 21 The star B.A.C. 1,471, on page 47, has, by the B.A.C. catalogue, the position 117 47' 47"'60 for 1878 ; the same star has however been observed at "Washington, and the position for 1878 thence derived is 117 48' 16"'14, which agrees closely with the Sydney result. On page 53 the B.A.C. position for 2,843 is 121 15'49"'16. The position from Washington observations is 121 16' 17"'46, which agrees closely with the Sydney position. On page 70 the position of B.A.C. 7,702 is 124 36' 42" f 54, with precession and proper motion. This position however depends upon Brisbane, who only had one obser- vation for N.P.D. and none for B/.A. On examining this place with the equatorial, I find there are two stars, and it is, I think, evident that Brisbane took the second one, which is 91" greater in E.A., and 72" further north. Brisbane's position for 7,132, for 1878, in N.P.D. is 124 36' 56"-97 Washington's observations for 9693, brought up to 1878 124 38' 14"-61 10,257, Taylor, which was rejected by B.A.C., although he had seven observations ... 124 38' 13"'21 Sydney 124 38' 15"'91 SYDNEY OBSERVATORY. MEAN RIGHT ASCENSIONS AND NORTH POLAR DISTANCES, OBSERVED IN 1877 AND 1878, AND REDUCED TO JANUARY 1 OF EACH YEAR. SYDNEY OBSERVATORY. MEAN EIGHT ASCENSIONS AND NORTH POLAR DISTANCES, OBSEKVED IN 1877 AND REDUCED TO JANUARY 1, 1877. 2 , 3 Q Q 04 STAR. Date. R.A. at Observation. fl . d rf N.P.D. at Observations. Id X 1 I 1 J i X 1 a" 2" I 1 a Andromedse.. Nov. I 61 34 49 74 31-49 81-23 2 13 2 5-66 3-77 1-89 49-90 32-61 82-53 14 548 3-76 1-72 48-00 32-68 80-68 15 5-71 375 1-96 46-96 3275 7971 23 5-59 3-67 1-92 46-45 3319 7964 1-87 1-90 80-76 79-43 /BHydri April 25 Oct. 24 19 27-08 10-47 16-61 77 56 28-92 7-65 36-57 S.P. 3 Nov. 5 26-34 9-80 16-54 13 25-75 9-23 16-52 23 24-99 8-41 16-58 16-56 15-81 36-57 52-68 12Ceti Oct. 13 23 49-88 4-15 45-73 94 37 47-98 25-14 73-12 6 Nov. 23 49-69 4-00 45-69 48-92 2433 73-25 45-71 45-64 73-19 74-00 jSCeti Nov. 23 108 39 25-38 20-56 45-94 2 30 37 29-13 4-10 2503 25-42 1972 45-14 2503 24-80 45-54 43-87 Piscum Nov. 20 56 37-75 4-12 33-63 82 45 51-91 28-23 80-14 4 23 37-75 4-11 33-64 53-43 28-15 81-58 30 37-70 4-06 3364 54-78 27-90 82-68 Dec. 3 3765 4-05 3360 52-32 27-75 8007 7 52-77 2757 8034 3363 33-68 80-S6 81-83 Ceti Nov. 20 1 17 56-71 4'23 52'48 98 48 43'21 24-49 67'70 3 23 43-35 24-15 67-50 Dec. 3 56-77 4-17 52-60 46-40 23-12 69-52 5 56-62 4-15 52-47 44-48 22-90 67-38 6 56-68 4-15 52-53 45-12 22-80 67-92 7 56'tfO 4-14 52-56 4491 22-70 6761 12 56-66 410 52-56 46-12 22-20 6834 5253 52'46 68-00 66-80 Mean Right Ascensions and North Polar Distances of Stars s 4 2 p P- O r-5 Jj N.P.D, G . "J STAR. Date. R.A. at Observation. Id 3 II at Observations. *" a 11 | 1 o ! H J" i 1 g u /r i] Piscium Nov. 20 1 24 58-36 4-29 54-07 75 16 51-84 29-65 81-49 4 30 58-24 4-25 53-99 53-21 29-65 82-86 Dec. 3 58-34 4-24 54-10 51-97 2S-62 81-59 5 6 58-15 58-29 4-23 4-21 53-92 54-08 51-99 50-24 29-59 29-56 81-58 79-80 7 58-36 4-22 54-14 51-24 29-55 80-79 12 58-34 4-19 54-15 51-48 29-43 80-91 54-06 54-15 81-29 79-96 j/Piscium Nov. 20 1 35 6-19 4-29 1-90 85 7 40-93 27-53 68-46 5 30 6-06 4-27 1-79 Dec. 3 6-16 4-26 1-90 42-54 26-87 69-41 5 5-96 4-24 1-72 42-42 26-75 69-17 6 6-03 4-24 1-79 40-69 26-69 67-38 7 614 4-24 1-90 - 40-84 26-63 67-47 11 5-98 4-21 1-77 40-28 26-38 66-66 17 5-95 4-17 1-78 42-57 26-02 68-59 1-82 1-80 68-16 68-57 0Arietis Nov. 30 1 47 55-13 4-45 50-68 Dec. 3 55-24 4-44 50-80 5 55-14 4-43 50-71 69 47 10-95 30-35 41-30 6 55-15 4-43 50-72 9-26 30-36 39-62 3 7 55-08 4-42 50-66 8-76 30-37 39-13 11 55-12 4-40 50-72 10-05 30-38 40-43 12 55-21 4-39 50-82 9-63 30-37 40-00 17 55-10 4-37 50-73 9-93 30-35 40-28 26 55-04 4-29 50-75 7-61 30-20 3781 50-73 50-75 39-80 3S-S7 a Arietis Nov. 28 2 18-82 457 14-25 Dec. 3 19-02 4-56 14-46 67 6 43-60 3039 73-99 2 5 18-87 4-55 14-32 43-09 30-45 73-54 6 18-94 4-55 14-39 41-49 30-48 71-97 7 19-01 4-55 14-46 42-98 30-50 73-48 11 18-94 4-53 14-41 40-80 30-57 71-37 12 18-90 4-52 14-38 42-22 30-60 72-82 17 18-93 4-50 14-43 41-92 30-63 72-55 26 18-91 4-42 14-49 40-49 30-58 71*07 14-40 14-49 72-60 72-71 67. Ceti Dec. 6 2 10 55-27 4-34 50-93 96 59 1-04 22-98 24-02 6 7 55-24 4-34 50-90 1-10 22-88 2398 11 55-30 4-32 50-98 1-62 22-43 24-05 12 55-21 4-32 50-89 3-78 22-31 26-09 17 55-27 4-28 50-99 1-95 21-78 23-73 19 55-32 4-27 51-05 1-79 21-55 23-34 26 55-15 4-22 50-93 1-90 20-87 22-77 50-95 50-87 24-00 24-07 Observed at the Sydney Observatory ', 1877. STAR. Date. R. A. at Observation. Correction to Jan. 1. STAR. Date. R.A. at Observation. J !i < sf 5 || pi 1 N.P.D. at Observations. li g c Cn'rt t* ! a *_ & Aquilso Aug. 9 23 Sept. 3 19 12 5-97 5-85 5-68 567 3-36 3-28 3-16 3-13 2-61 2-57 2-52 2-54 78 37 26-63 21-62 24-17 22-78 4-60 6-48 7-62 7-70 31-23 28-10 31-79 30-48 5 2-56 2-52 30-40 30-20 5 Aquilre Aug. 28 Sept. 3 12 19 19 20-92 3-26 17-66 87 7 38-14 37-59 38-20 36-80 5-72 6-13 6-20 6-63 43-S6 43-72 44-40 43-43 3i 17-66 17-71 43-85 44-28 A 3 Sagittarii ... Aug. 23 28 Sept. 12 17 19 20 19 29 17-36 17-16 1730 17-21 17-22 4'26 4-05 3-97 3-94 3-89 13-10 13-11 13-33 13-27 13-33 115 9 9-80 11-24 11-11 11-71 11-99 10-07 o-oo 022 0-84 1-03 1-11 1-15 9-80 11-02 10-27 10-68 10-88 8-92 4i 13-23 13-16 10-26 10-78 7 Aquilse July 16 27 Aug. 23 28 Sept. 12 17 18 19 20 19 40 27-96 28-11 28-06 27-95 27-82 27-75 27-75 27-76 3-43 3-39 3-36 3-18 313 3-11 3-09 3-05 24-53 24T2 24-70 24-77 24-69 24-64 24-66 2471 79 40 62-61 58-76 57-88 55-36 5625 54-64 54-24 54-47 1-94 8-22 9-16 1022 10-56 1064 10-68 10-74 64-55 66-98 67-04 65-5S 66-81 6532 64-92 65-21 3 2468 24-72 65-80 67-01 o Aquilte July 27 Aug. 28 Sept. 12 14 17 18 19 20 19 44 50-22 50-27 50-13 50-08 5005 49-94 50-01 3-45 3-40 3-25 318 3-16 313 3-11 46-77 46-87 46-88 46-90 4ti-89 46-81 46-90 81 27 12-92 7-44 9-52 7-60 7-81 7-34 5-02 8-79 10-13 10-27 10-45 10-51 10-56 10-62 21-71 17-57 19-79 18-05 18-32 17-90 15-64 u 46-86 46-90 18-43 18-90 Aqiiil July 16 Aug. 28 Sept. 12 14 17 18 19 20 19 49 19-78 19-65 19-24 19-30 19-51 19-42 3-48 3-32 3-25 3-24 3-23 3-17 1630 16-33 15-99 16-06 16-28 16-25 83 53 52-81 49-98 4532 46-52 4594 47-94 45-49 46-25 2-57 7-68 9-90 10-01 10-18 1023 10-41 1042 55-38 57-66 55-22 56-53 56-12 58-17 55-90 56-67 4 16-20 16-25 56-46 5698 1 8 Mean Right Ascensions and North Polar Distances of Stars STAR. Date. R.A. at Observation. 2 || I Mean R.A. Jan. 1. Tabular R.A. N.P.D. at Observations. Correction to Jan. 1. MeanN.P.D. Jan. 1. Tabular N.P.D. Magnitude. cr Capricorn!.. . Sept. 14 18 20 3 2 5 20 11 17-59 17-45 3-80 3-75 13-79 13-70 1367 102 55 21-78 21-07 22-06 6-92 6-90 6-80 28-70 27-97 28-86 28-96 13-75 28-51 o Pavonis Sept. 14 27 20 16 0-48 5-94 54-54 54-74 157 7 53-30 6-93 60-23 60-23 35-49 54-54 p Capricorn! ... Sept. 18 19 20 24 20 21 54-60 54-49 54-40 54-47 3-99 3-99 3-95 3-93 50-61 50-40 50-45 50-54 50-50 108 13 1-55 1-55 206 0-94 6-43 6-38 6-36 6-24 7-98 7-93 8-42 7-18 7-76 50-50 7-88 a Cygni Sept. 24 Oct. 1 5 20 37 16-75 16-62 2-56 2-29 14-19 14-33 14-30 45 9 9-80 7-87 21-03 22-18 30-83 30-05 30-55 1 14-26 30-44 32 Vulpecubee Aug. 25 Sept. 24 Oct. 5 8 20 49 22-16 22-08 21-79 21-69 3-30 3-01 2-85 2-79 18-86 19-07 18-94 18-90 19-07 62 24 19-35 16-28 11-73 14-11 19-58 21-12 3346 3586 32-85 33-72 76-68 4i 5 3 18-94 34-06 61 1 Cygni Sept. 24 28 Oct. 1 8 21 1 26-17 26-03 25-95 25-71 2-88 2-81 2-75 2-62 23-29 23-22 23-20 23-09 22-87 51 50 51-28 49-65 50-64 47-52 21-55 22-24 22-73 23-70 72-83 71-89 73-37 71-22 23-20 72-33 CCygni Aug. 25 Oct. 1 5 8 21 7 45-43 45-00 45-07 44-92 3-33 2-97 2-91 287 42-10 42-03 42-16 42-05 42-06 60 16 18-54 14-95 12-50 14-86 21-91 22-73 33-40 36-86 35-23 36-81 42-09 35-16 B.A.C.7475... Aug. 25 21 24 52-83 4-86 47-97 48-66 124 28 52-90 11-77 64-67 11-62 6 Observed at the Sydney Observatory, 1877. STAR. Date. R.A. at Observation. Correction to Jan. 1. Mean R.A. Jan. 1. Tabular R.A. N.P.D. at Observations. $ JH MeanN.P.D. Jan. 1. Tabular N.P.D. 1 Aquarii Sept. 28 30 Oct. 8 15 16 21 25 8-80 8-75 8-59 8-48 3-81 3'70 3-61 3-61 4-99 5-05 4-98 4-87 96 6 24-94 25-32 25-48 25-69 25-53 15-42 15-40 15-33 15-18 15-16 40-36 40-72 40-81 40-87 40-69 3 4-97 4-90 40-69 40-76 e Pcgasi Aug. 25 Sept. 27 28 Oct. 1 5 8 10 15 21 38 12-34 12-33 12-14 12-18 12-08 12-14 11-95 3-66 3-56 3-54 3-52 3.48 3-45 3-35 8-68 8-77 8-60 8-66 8-60 8-69 8-60 80 40 60-77 55-45 56-97 59-88 56-85 56-97 57-40 56-89 16-06 19-80 19-80 20-01 20-23 20-39 20-38 20-35 76-83 75-25 76-79 79-89 77-08 7736 77-78 77-24 : 8-64 8-72 77-28 77-67 16 Pegasi , Aug. 25 Sept. 27 28 Oct. 5 15 21 47 31-42 31-35 31-13 30-99 3-45 3-34 3-32 3-12 27-97 28-01 27-81 27-87 64 38 53-90 44-83 47-74 48-64 48-80 16-32 22-93 22-93 23-87 24-43 70-22 67-76 70-67 72-51 73-23 27-92 27-98 70-88 70-88 a Aquarii Sept. 27 28 Oct. 16 22 26 21 59 31-55 31-42 31-42 3-65 3-58 3-53 27-90 27-84 27-89 90 54 38-80 42-62 40-31 41-98 19-29 19-29 19-40 19-24 58-09 61-91 5971 61-22 3 27-88 27-87 60-23 60-32 a Gruis Oct. 15 23 22 33-62 33-65 5-21 5-07 28-41 28-58 137 33 12-78 12-83 6-35 4-76 19-13 17-59 2 28-50 28-44 18-36 19-60 B.A.C.7702... Aug. 22 24 25 22 1 18-13 18-15 4-79 4-82 13-34 13-33 124 38 12-26 15-14 13-38 16-38 16-18 16-08 28-64 31-32 29-46 * 13-34 13-95 29-81 *42-54 Anonymous .. Aug. 25 22 3 49-18 4-81 44-37 124 36 46-08 16-56 62-64 7 8 Aquarii Aug. 25 Oct. 15 16 22 23 26 22 10 24-52 24-31 24-27 24-20 3-86 3-85 3-79 3-74 20-66 20-46 20-48 20-46 98 23 24-89 23-46 24-09 25-28 23-92 16-42 18-18 ]8'15 17-89 17-85 41-31 41-64 42-24 43-17 41-77 4"03 4.2 -R7 41 20-51 20-48 B.A.C. position to date 124 36' 42"'54. :2O Mean Right Ascensions and North Polar Distances of Stars STAR. Date. R.A. at Observation. 3 OrH Mean R.A. Jan. 1. Tabular R.A. N.P.D. at Observations. Correction to Jan. 1. Pu . ii a Tabular N.P.D. Magnitude. i\ Aquarii Oct. 12 25 26 2 29 5-88 5-83 5-78 3-81 3-69 3-67 207 2-14 2-11 90 44 45-48 40-87 1752 21-39 63-00 62-26 4 2-11 2-05 62-63 63-44 Pegasi Oct. 12 22 35 23-26 3-65 19-61 79 48 16-48 24-27 40-75 3 25 26 22-95 23-13 3-53 3-53 19-42 19-60 1269 14-90 24-73 24-75 37-42 3965 19-54 19-58 39-27 37-09 B.A.C.7930... Nor. 6 7 22 38 51-74 4-12 47-62 115 52 45-01 44-07 13-42 13-32 58-43 57-39 6 47-62 47-44 57-91 54-93 B.A.C.7980... Nov. 6 22 48 11-27 3-94 7-33 7-38 106 28 11-69 17-19 28-88 26-35 3 a Pis. Aust. ... Oct. 25 Nov. 6 7 22 50 65-59 55-40 55-38 4-42 4-27 4-25 51-17 51-13 51-13 120 16 12-20 11-48 12-93 13-17 25-13 24-65 1 51-14 50-96 24-89 26-05 a Pegasi Aug. 30 Oct. 30 31 Nov. 6 7 22 58 41-69 41-62 41-58 41-39 41-35 3-67 3-56 3-55 3-48 3-48 38-02 38-06 38-03 37-91 37-87 75 26 56-78 56-14 54-39 55-89 26-55 27-14 27-26 27-28 83-33 83-28 81-65 83-17 2 37-98 38-04 82-86 82-23 B.A.C. 8085 ... NOT. 6 8 23 7 60-95 60-98 3-84 3-82 57-11 57-16 96 42 18-57 19-21 21-57 21-44 40-14 40-65 5 57-14 57-33 40-40 40-22 y Pi?cium Aug. 30 Oct. 25 30 31 Nov. 1 2 7 8 23 10 51-16 51-19 5101 51-14 51-20 51-04 50-94 3-81 3-82 3-78 3-78 3-77 3-76 3-71 47-35 47-37 47-23 47-36 47-43 47-28 47-23 87 22 61-95 57-32 58-87 59-58 59-52 59-16 59-28 58-36 22-08 24-72 24-64 24-64 24-61 24-60 24-47 24-45 84-03 82-04 83-51 84-22 84-13 83-76 83-75 82-81 4 47-32 47-28 83-53 83-30 Observed at the Sydney Observatory, 1877. 21 3 2 Aquarii 99 50 51-61 Mars 23 27 40-82 99 44 54-48 B.A.C. 8,239 23 34 50-43 102 21 20-70 Weisse985 23 49 30'02 103 49 38-98 July 31 ... 74 Aquarii 22 47 3 27 102 15 53-33 h l Aquarii Weisse 76 22 58 48-00 23 6 37-08 98 21 6-98 100 13 57-83 ty* Aquarii 23 11 33 71 99 50 51-74 Mars Mars 23 27 26-87 99 45 57-49 99 46 8-03 B.A.C. 8.239 23 34 49-88 102 21 23-43 B.A.C. 8,266 B.A.C. 8,285 Weissc985 23 40 58-68 23 49 29-48 102 35 5-38 100 39 16-34 103 49 41-89 Aug. 2 ... A 1 Aquarii 22 58 48-36 98 21 6-27 Weisse 76 23 6 37-25 100 13 59-76 99 50 54-25 Mars 99 48 9-30 Mars 23 28 2-77 99 48 20-89 B A C 8 239 23 34 50-49 102 21 24-10 B.A.C. 8,266 B A C 8 285 102 35 4-07 100 39 15-96 Weisse 985 23 49 29-79 103 49 42-00 Aug. 3... 74 Aquarii 22 47 3-13 22 58 48-20 102 15 52-26 98 21 6-17 Weisse 76 ... 23 6 37-37 99 13 57-40 <|/ 2 Aquarii 23 11 33-79 99 50 53-66 Mars Mars B.A.C. 8,239 B.A.C. 8,266 B.A.C. 8,285 Weisse 985 23 28 15-34 23 34 50-14 23 40 59-11 23 49 29-48 99 49 39-08 99 49 50 91 102 21 23-50 102 35 6-23 100 39 17-40 103 49 41-90 Daily Results of Observations Date. Name. R.A. N.P.D. Remarks. Aug. 4... A 1 A quarii Weisse76 h. in. *. 22 58 47-93 23 6 36-94 98 21 5 24 100 13 57-38 99 50 50-95 Stars very steady. 99 5L 2488 23 28 24-46 99 51 36-28 B.A.C. 8,239 B.AC. 8,266 B AC 8285 23 34 49-50 23 40 58-68 23 43 57-49 102 21 22-13 102 35 3 76 100 39 14 53 Weisse 985 23 49 29-52 103 49 40-49 Aug 6 ' 102 15 50-57 98 21 4-75 Stars steady but badlv Weis^c 76 100 13 57'20 defined. 99 50 52'24 Mars 99 55 43'62 23 28 34-44 99 55 55-61 B.A.C. 8,239 102 21 21-75 B.A.C. 8.266 102 35 4 65 Weisse985 23 49 29-32 103 49 40-67 Aug 8 98 21 4-94 Wcissc 76 ip Aquarii Mars B.A.C. 8,239 B.A.C. 8266 23 6 38-19 23 28 32-78 100 13 57-70 99 50 50-75 100 1 13-98 102 21 2285 102 35 4-27 Weisse985 23 49 30-61 103 49 40-49 Aug. 10... 74 Aquarii A 1 Aquarii Weisse76 22 47 3-74 22 58 48-57 23 6 37-71 23 11 34'23 102 15 53-90 98 21 694 100 13 58-51 99 50 51-03 Mars 100 7 2060 23 28 lfi-76 100 7 30'66 B.A.C. 8,239 23 34 50-45 102 21 22-39 B.A.C. 8,266 23 40 59 19 102 35 5'92 B A C 8 285 23 43 57-47 100 39 15'44 Weisse 985 23 49 2875 103 49 40'73 Aug. 11... A 1 Aquarii 22 58 48-73 98 21 4-38 Weisse 76 23 6 37'82 100 13 56'16 23 11 34-00 99 50 50 75 100 10 44'65 23 28 4'20 100 10 55 90 B.A.C. 8,239 B A C 8 266 23 34 50-74 23 40 59-57 102 21 22-58 102 35 4-33 B I.C. 8 285 100 39 14'82 Weisse 985 103 49 4077 Aug. 18.. 22 47 3-65 102 15 5274 22 58 48'58 98 21 8'87 100 40 5-22 Mars 23 25 11'63 100 40 17-94 B.A C. 8239 22 34 50'69 B.A.C. 8,266 102 35 5-57 B.A.C. 8,285 100 39 16'11 Taken during the Opposition of Mars, 1877. 33 Date. Name. R.A. N.P.D. Remarks. Aug. 19.. 74 Aquarii A. m. s. 22 47 3-80 , A 1 Aquarii 22 58 48-56 Weisse76 v|> 2 Aquarii 23 6 38-02 23 11 34-24 100 13 57-34 99 50 52-10 Mars 23 24 35-81 100 45 2-39 B.A.C. 8,239 B A C 8 266 23 34 50-67 102 35 2 97 B.A.C. 8,285 23 43 57-41 100 39 13-23 Weisse 985 23 49 29-81 103 49 40-26 Aug 20 22 58 48'49 98 21 6 09 Weisse 76 23 6 37'60 100 13 57-39 >P Aquarii Mars 23 11 34-23 99 50 51-49 100 49 41-51 Stars unsteady. Mars 23 23 57-02 100 49 52-17 B.A.C. 8,239 23 34 50-50 102 21 21-89 B.A.C. 8,266 B.A.C. 8,285 23 40 59-46 102 35 4-07 100 39 13-83 Weisse 985 23 49 30-52 103 49 41-39 Aug. 22... 74 Aquarii 22 58 48'59 102 15 49-96 98 21 2'90 Weisse 76 23 6 37-55 100 13 55-63 and dancing two or $* Aquarii Mars 23 11 34-36 23 22 32 07 99 50 50-43 100 59 40-85 100 59 5278 three seconds. B.A.C. 8,239 B.A.C. 8,266 23 40 59-72 102 21 20-95 102 35 2-27 fined, at other times blazing up to four times B.A.C. 8,285 100 39 13 56 their proper size. Weisse 985 23 49 30-28 103 49 40-47 Aug. 23... 74 Aquarii Weisse 76 22 47 4-27 102 15 49-70 100 13 57 83 i// 2 Aquarii 23 11 34-69 99 50 51-39 101 4 49'60 Mars 23 21 46-21 101 5 0-52 B.A.C. 8,239 23 34 50-72 102 21 20-54 Stars steady. B A C 8 266 23 40 59-93 102 35 3-33 B A C 8 285 23 43 57'69 100 39 12-05 Weisse 985 23 49 30'40 103 49 38-07 Aug 24 22 47 387 102 15 49-46 22 58 48-60 98 21 4-99 Weisse 76 23 6 37-45 99 13 57-46 23 11 34-16 99 50 50-92 Mars . . .... 101 10 0-33 23 20 57.57 101 10 10-47 Not very satisfactory. B.A C. 8,239 23 34 50-52 102 21 20-95 B.AC. 8,266 23 40 59-42 102 35 3 66 B.A.C. 8,285 Weisse, 985 23 49 30-09 100 39 12-88 103 49 38-77 Aug. 25 74 Aquarii 22 47 3-72 102 15 52-83 A 1 Aquarii Weisse 76 22 58 48-69 23 6 37-84 98 21 5-03 100 13 56-15 23 11 34'36 99 50 50'55 Mars 101 15 13-27 Mars 23 20 7-44 101 15 24-27 B.A.C. 8,239 B A C 8 266 23 40 59-84 102 21 22-05 102 35 4'14 B A C 8 285 23 43 57-91 100 39 14-17 Weisse 985 23 49 30'85 103 49 40-46 34 Daily Results of Observations Date. . Name. It.A. N.P.D. Remarks. Au" 30 h. in. s. 101 41 20-49 B A C 8 199 102 12 57'80 Aug. 31 ... Weisse76 Mars 23 6 37-83 100 13 56-45 101 46 10'27 Mars B A C 8 199 23 14 26-17 101 46 19-57 102 12 55-95 B.A.C. 8.221 23 31 20-54 103 44 4-90 B A C 8 266 23 40 59-39 102 35 3 10 Sept. 2 ... 70 Aquarii 74 Aqtiarii 22 42 5-69 101 11 55-56 102 15 51-66 B.A.C. 8,001 Mars 103 43 24-65 101 56 1-60 Mars 23 12 21-37 101 56 13-49 B.A.C. 8,199 23 25 53-02 102 12 57-59 B.A.C. 8,260 23 40 59-33 102 35 2-97 Sept 3 23 11 17-40 102 53-73 Wei7 O / // 100 39 40-08 70 Aquarii 74 Aquarii B.A.C. 8,004 Mars \Vcissc394 B.A.C. 8,221 B.A.C. 8,266 22 42 5 95 22 47 3-61 22 53 10-80 23 21 5-62 23 31 20-84 101 11 55-23 102 15 51-16 103 43 25-34 102 39 57-83 103 35 54-92 10:i 44 7-03 102 35 4-06 Sept, 15... Mars Mars B.A.C. 8,199 B.A.C. 8,221 B.A.C. 8,266 22 58 17-77 23 25 53-76 23 31 20-63 23 40 59'78 102 41 41-03 102 41 54-15 102 12 57-66 103 44 5-59 102 35 2-42 Sept. 18 Mars 102 45 51-07 Mars 22 55 5175 102 45 59'78 Weisse 394 23 21 6-24 103 35 58 35 B.A.C. 8,199 23 25 53-9 102 12 59 08 B.A.C. 8,22L B.A.C. 8,266 23 31 21-07 23 40 59 67 103 41. 5'78 102 35 369 Sept 20 102 47 0'25 22 54 10-57 102 47 10'28 Weis?e 76 23 6 38 03 100 13 55-15 j ty- Aqiwrii 23 11 31-37 99 50 50-41 105 42 28'51 S.-pt. 24 ... P Aquarii 97 Aquarii 22 59 55-24 23 6 37 89 23 11 34-60 23 16 16-38 00 15 44-98 100 13 58-46 99 50 53-87 105 42 30'73 SYDNEY OBSERVATOEY. 37 CATALOGUE OF CONCLUDED MEAN BIGHT ASCENSIONS, AND MEAN NORTH POLAR DISTANCES, FOR 1877, JANUARY 1, OF STARS OBSERVED IN THE YEAR 1877, WITH THE ANNUAL PRECESSIONS. No. Name of Star. Mag. Number of Obs. of R.A. Fraction of the Year for Mean. Mean R.A. 1877. Jan. 1. Pre- cession in R.A. Number of Obs. of N.P.D. Fraction of the 1 Year for Mean. Mean N.P.D. 1877. Jan. 1. Pre- cession in N.P.D. 1 2 a Andromedse /3 Hvdri 2 3 4 4 87 8=> h. m. s. 2 1-87 19 16'56 s. + 3-088 3-273 5 pj 1 87 31 61 35 20-76 77 56 36'57 19-903 20'245 3 12 Ceti 6 ? 81. 23 4571 3 059 9 84 94 38 13-19 19-937 4 Ceti ? 1 91 37 25'03 3'012 2 90 108 39 45 54 19-806 5 6 7 8 9 10 11 e Piscium Ceti j] Piscium v Piscium /3 Arietis a Arietis 67 Ceti 4 3 4 5 3 2 6 4 6 7 8 9 9 7 91 92 92 93 94 94 9^ 56 33-63 1 17 52-53 24 54-06 35 1-82 47 50-73 2 14-40 10 50-95 3-112 2-9:6 3-200 3-114 3-298 3-367 2-987 5 7 7 7 7 8 7 90 92 92 93 94 94 95 82 46 20-96 98 49 8-00 75 17 21-29 85 8 8-16 69 47 39-80 67 7 12 60 96 59 24'00 19-446 18-686 18-692 18-314 17-764 17-206 16'733 12 13 B.A.C. 765 7 2 Ceti 6 3 5 s 95 9=1 22 49-45 37 55'62 2-540 3-101 :> 4 96 95 124 21 44-55 87 17 1'06 16-284 15-342 14 a Ceti 2* 6 98 55 51'04 3-129 4 98 86 23 37-59 14-324 15 8 Arietis 4 4 98 3 4 35 81 3-419 8 97 70 44 23-99 13-892 16 17 Eridani 3 41 2 1 98 99 27 8'03 4 5 51-85 2-822 2-923 2 1 .98 99 99 52 34-17 97 9 38-37 12363 9-648 18 19 20 3 Orionis Tauri 1 2 9 1 1 3 21 11 li 5 8 37-59 18 31-09 25 43-38 2-880 3-790 3-064 1 1 21 21 98 20 46-38 90 23 43-28 4-436 3-408 21 3i 9, 11 27 18-38 2-646 22 ? 3 1? 29 58-28 3-041 l 14 91 16 58'42 2-608 23 24 a Columbse 2 1 2 4 15 9] 35 11-81 48 30-76 2-179 3246 2 3 16 24 124 8 2662 82 37 5-59 2-165 1'002 25 4} 4 17 6 33-03 3-426 2 19 75 13 8'00 4- 0-070 26 27 28 29 30 31 32 33 31 35 36 fj. Geminorum o Argus (Canopus) y Geminorum a Canis Majoris ... Canis Majoris ... 7 Canis Majoris ... 8 Geminorum o 2 Geminor o Can. Min .. Geminor 6 Cancri 3 1 2i 1 2i 4 3 li 1 2 5 5 3 8 7 8 6 7 9 9 9 6 15 17 17 17 16 17 17 16 16 17 16 15 31-23 21 13-17 30 36-41 39 43-57 53 47 38 58 11-70 7 12 46 64 26 45-16 32 51-66 37 47-34 55 57 73 3-632 1-330 3-46R 2646 2-357 2-717 3-591 3-840 3144 3-679 3-693 2 3 8 7 7 5 6 7 5 1 ... 15 18 18 18 19 17 18 18 18 18 19 67 25 31-15 142 37 43-13 73 29 53-50 106 32 59-37 118 48 23-51 105 27 12-42 67 47 35 36 57 50 37-46 84 27 43-03 61 40 43 15 61 51 45-46 1-499 1-855 2-713 4-702 4-685 5-050 6-284 7-494 8-988 8-363 9-792 37 38 39 B.A.C. 2,717 B.A.C. 2,719 i) Cancri 6 6 fi 1 5 2 17 17 ?,o 8 18-55 Bootis 5 3 50 59 10-60 2-570 5 49 62 34 19-06 14-230 77 ft Librae 2 4 50 15 10 23-25 3-219 6 49 98 55 41-59 13-531 78 o Coronse Borealis. 2 6 50 29 28-90 2-539 7 50 62 52 14-10 12-313 79 a Serpentis 41 5 50 38 12-54 2-951 6 51 83 11 13-06 11-579 80 B.A.C. 5,227 5 1 50 43 8-37 3795 6 49 123 15 1-93 11-277 81 B.A.C. 5,268 4s 5 49 49 1-74 3-818 !' 49 123 36 14 67 10-847 82 /8 1 Scorpii 2* 3 52 58 17-19 3-478 5 51 109 28 3-33 10-175 83 5 Ophiuehi 3 1 54 16 7 54-17 3-136 1 54 93 22 36-29 9-551 84 a Scorpii 1 4 57 21 51-96 3-669 5 56 116 9 25-83 8-354 85 fHerculis 3 6 56 36 38-95 2-263 5 56 58 10 23-10 6-682 86 K Ophiuehi 4 7 57 51 50-76 2-834 8 57 80 25 56-55 5-JS54 87 a 1 Hereiilis 31 6 57 17 9 2-36 2-731 7 57 75 28 4-76 4-381 88 6 Ophiuehi 3i 6 59 14 27-43 3-677 7 57 114 52 28-67 3-937 89 a Ophiuchi 2 5 58 29 13-49 2-779 (; 57 77 20 57 77 2-883 90 ju Herculis 4 6 59 41 38-60 2-344 5 59 62 12 23 13 2-343 91 B.A.C. 6,076 7 2 47 51 49-81 3-951 i' 47 123 23 45-99 + 0-715 92 fj. Sagittarii 4 6 63 18 6 24-50 2-584 4 64 111 5 18-55 -0-554 93 a Octantis 5i 13 40 19 15-55 109-772 3 3 39 179 16 37-83 1-961 94 Lyra 1 4 62 32 46-47 2-030 5 59 51 19 45-02 3-139 95 ft Lyra; 4 4 63 45 32-40 2-21L' 3 '63 56 46 44-29 3'930 96 a Sagittarii 3 1 56 47 38-58 3-722 97 Aquilae 3 8 62 59 45-34 2-752 8 62 76 19 5-09 5-102 98 ia Aquilae 5 4 65 19 12 2-56 2-814 4 65 78 37 30-40 6-223 99 8 Aquilae 31 1 70 19 17-66 3-023 1 67 87 7 43-85 6-903 Observed at the Sydney Observatory, 1877. 39 1 li 1 Js ~ 4M , 72 62 24 34-06 13-505 109 61 1 Cygni 54 4 75 21 1 23-20 2-673 4 75 51 51 12-33 17-481 110 CCvgni 3 4 73 7 42-09 2-548 8 72 60 16 35-16 14-581 Ill B.A.C. 7,475 6 1 65 24 47-97 3-646 1 65 124 29 4'67 15-629 112 /3 Aquarii 3 4 77 25 4-97 3-161 5 77 96 6 40-69 15-646 113i e Pegasi 24 7 74 38 8-64 2948 s 75 80 41 17-28 16-336 114 16 Pegasi 54 4 73 47 27-92 2-727 6 74 64 39 10-88 16-785 115 o Aquarii 3 3 81 59 27-88 3-OSO -1 77 90 55 0-23 17-324 116 a. Gruis 2 2 80 22 28-50 3-811 2 80 90 54 18-36 17-209 117 B.A.C. 7,702 64 2 64 1 13-34 3-528 3 64 124 38 29-81 17-420 118 Anonymous 7 1 65 3 44-37 3-520 1 65 124 37 2-64 17-529 119 6 Aquarii 44 4 80 10 20-51 3-169 5 76 98 23 42-03 17773 120 50 Aquarii 6 4 80 17 51-70 3-217 4 80 104 9 8-18 18-096 121 1 136 Weisse 76 7 25 76 6 33-86 3-128 >r 76 100 14 18-83 19-512 137 B.A.C. 8,085 5 2 85 7 57-14 3-108 2".. 85 96 42 40-10 19-539 138 Weisse 123 7 1 84 8 15-17 3-132 84 101 21 27-08 19-515 139 i/ Pisniiim 4 7 80 10 47-32 3-106 8 83 87 23 23-53 19-584 140 Weisse 185 7 1 85 23 11 14-83 3-134 i 85 102 23 o-80 19-602 141 vf> 2 Armnrii 5 17 67 11 30-51 3-121 22 ... 65 99 51 13-55 19-607 142 Weisse 226 5 1 84 12 33-42 3-122 84 100 16 59-93 19-626 143 Weisse 228 8 1 87 12 37-15 3-135 1 87 102 50 35-68 19-627 144 97 Aquarii 6 4 77 16 12-17 3-144 7 75 105 42 52-30 lfl-689 145 Weisse 309 8 3 85 16 37-56 3-143 ;j 85 101 26 52-89 19-61)6 146 Weisse 315 ......... 8 3 84 16 54-47 3-117 8 84 100 3 35-22 19-701 147 Anonymous 6 1 65 17 8-55 3-137 1 65 104 41 27 06 19-705 148 Weisse 377 9 3-116 1 87 100 42 39-72 19-753 149 K Piscium 6 84 20 37-62 3-075 6 84 89 24 4-68 19-639 150 Weisse 394 7 6 69 21 1-82 3-127 7... 69 103 36 20-28 19.765 151 Weisse 403 7 1 85 21 4095 3-120 1 85 102 7 35-14 19-775 152 Weisse 427 7 2 72 22 38-88 3-110 2 72 99 56 36-03 19-788 153 BA.C. 8,199 7 5 69 25 49-65 3-115 1 * 68 102 12 21-52 19-832 154 Weisse 497 7 5 85 26 3-40 3-117 i 85 101 40 40-81 19-834 15: Weisse 571 8 1 85 29 5-81 3-108 1 85 101 14 6-11 19872 Wciese586 74 2 84 29 39-40 3-102 i sr> 99 26 43-52 19-878 15 ' B.A.C. 8,221 6 9 69 31 16-64 3-113 < 69 103 44 29-86 19-897 40 Mean Right Ascensions and North Polar Distances of Stars No. Name of Star. Mag. o SfSJ 2 & II Mean K.A. 1877. Jan.l. Pre- cession in B.A. Number of Obs. 1 a II 1| Mean N.P.B. 1877. Jan. 1. Pre- cession in N.P.D. 158 Weisse 629 7 ?, 85 h. m. s. 23 31 51-38 + 3-099 ?, ^ 85 99 18 30-52 19-903 159 i Piscium 7 80 33 37-38 3-084 7 81 85 2 26 11 19-472 160 B A C 8 239 6 1? 61 34 46 72 3-104 Ifi 60 102 21 45-09 19932 161 B A C 8 266 6 18 6n 40 55'64 3 097 25 64 102 35 28-17 19-985 162 163 164 165 166 8 Sculptoris B.A.C. 8,285 Weisse 985 B.A.C. 8,334 5 6 7 5 8 6 13 2 3 81 62 61 87 87 42 31-02 43 53-93 49 26-28 53 30 79 53 59-73 3-137 3-090 3-087 3-158 3-078 7 13 15 2 80 61 61 87 118 48 37-15 100 39 38-38 103 50 4-92 156 15 40-31 19-896 20-000 20-033 20-046 167 B.A.C. 8,346 5 5 86 55 31-23 3-074 3 85 93 42 44-22 20-050 SYDNEY OBSEKVATORY. MEAN RIGHT ASCENSIONS AND NORTH POLAR DISTANCES, EEDUCED TO JANUARY 1, 1878. STAR. Date. R A. at Observation. rrection to Jan. 1. <; . tf rt g| bularR.A. N.P.D. at Observation. 3 ll fc- 1 1* ular N.P.D. | 6 j 8 1 1 I B.A.C. 2 Nov. 25 1 55-78 4-45 5133 124 12 17-04 15-81 3285 6 28 55-91 4-41 51-50 14-13 15-43 29-56 51-42 51-81 31-21 39-70 a Andromedso NOT. 4 61 34 26-35 33-52 59-87 1 7 2 9-13 4-14 4-99 23-76 33-80 57-56 12 9-00 4-11 4-89 25-62 34-22 59-84 13 9-16 4-10 5-06 24-64 34-29 58-93 14 8-87 4-09 4-78 24-85 34-37 59-22 19 9-05 4-05 5-00 23-57 34-66 58-23 4-94 4-99 58-94 59-53 B.A.C. 24 NOT. 28 5 36-37 4-44 31-93 32-25 125 48 39-23 15-10 54-33 56-20 Si 7 Pegasi NOT. 7 6 61-42 4-19 57-23 75 29 11-46 31-10 42-56 2 15 61-33 4-16 57-17 10-76 31-23 41-99 57-20 57-26 42-28 41-91 B.A.C. 37 NOT. 27 8 53-08 4-46 48-62 49-66 125 34 40-56 15-44 56-00 50-70 6 B.A.C. 77 NOT. 21 17 10-90 4-48 6-42 121 42 21-22 17-75 38-97 6} 27 10-70 4-42 6-28 3024 1691 47-15 6-35 6-00 43-06 43-62 0Hydri S.P. May 1 19 18-27 1-35 19-62 167 55 68-12 21-86 89-98 S.P. 3 S.P. 8 18-74 0-89 19-63 67-71 24-23 91-94 S.P. S.P. 13 18-98 0-53 19-51 61-06 25-81 86-87 S.P. S.P. 27 20-25 0-66 19-59 58-83 2973 88-56 S.P. S.P. 28 20-45 076 19-69 61-65 29-98 91-63 S.P. NOT. 12 77-69 9-27 86-96 13 28-06 8-82 19-24 76-78 9-06 85-84 14 28-59 874 19-85 81-66 8-86 90-52 19 2S-09 8-34 19-75 78-41 7-93 86-34 25 27-43 7-83 19-60 80-03 6-99 87'02 19-61 19-14 88-57 92-43 Mean RigJit Ascensions and North Polar Distances of Stars STAR. - Date. R.A. at Observation. Correction to Jan. 1. < . ~ Jf Tubular R.A. N.P.D. at Observation. 3 _ 14 I Q" - 14-85 15-05 67-28 G4-11 B.A.C. 1082... Dec. 31 3 22 54-47 4-23 50-24 49-91 126 6 12-33 9-99 22-32 17-28 6 e Ericlani Jan. 7 8 9 Dec. 30 3 27 12-53 12-39 12-39 15-66 1-51 1 50 1-49 4-68 1102 1089 10-90 10-98 99 52 18 33 17-76 18-92 4-92 3-13 3-01 2-90 15-88 21-46 20-77 21-82 20-80 3 10-95 10-97 21-21 21-63 B.A.C. 1109 ... Dec. 31 3 29 44-82 4-32 40-50 40-08 122 16 48-74 1051 59-25 69-50 6 B.A.C. 1121... Dec. 30 3 32 14-68 4-35 10-33 9-18 120 13 45-54 10-82 5636 21-06 6 B.A.C. 1150... Dec. 31 3 37 2844 4-32 24-12 23-61 122 19 33-81 10-14 43-95 45-14 5 17 Tauri Jan. 7 8 9 Dec. 31 3 40 15-59 15-70 1553 19-47 1-62 1-61 161 5-54 13-97 14-09 13-92 13-93 66 16 14-09 12-98 14-10 4-24 1252 12-53 12-53 23-30 26-61 25-51 2663 27-54 3 13-97 14-02 26-57 25-54 7 1 Eridani Jan. 7 8 9 Dec. 31 3 52 21-90 21-88 21-83 25-00 1-64 1-63 1-61 4-67 20-26 20-25 20'22 20-33 103 51 22-41 23-91 23-69 1301 2-42 2-27 2-14 13-27 2f83 26-18 25-83 26-28 24 20-27 20-19 25-78 25-26 41 Tauri Jan. 15 3 59 9 26 1-71 7-55 7-45 62 43 38-43 13-10 51-53 43-04 6 o 1 Eridani Jan. 7 8 9 15 4 5 5fi-39 56-21 56-30 56-27 1-67 1-66 1-66 162 54-72 54-55 54-64 54-65 97 9 231G 23-G5 2362 23-47 4-18 406 3-9 1 3-25 27-3 27-71 27-. r >6 26-72 4| 54-64 54-56 27-33 2576 Observed at the Sydney Observatory, 1878. 47 STAR. Date. R.A. at Observation. j~ < ** - d ular R.A. N.P.D. at Observation. 3 Q *j| ular N.P.D. | i s 1 a i & H 1 h. m. s. s. s. s. / ,/ /, Tauri Jan. 15 4 12 53-03 1-80 51-23 51-08 62 56 23-38 12-64 36-02 27-54 5 E.A.C. 1333 ... Jan. 8 4 13 18-63 1-86 16-77 124 5 51-49 1-59 49-90 3* 9 18-47 1-85 16-62 51-67 1-80 49-87 23 1831 1-65 16-66 54-76 4-23 50-53 29 17-99 1-53 16-46 56-61 5-03 51-58 30 18-26 1-52 16-74 54-77 5-14 49-63 16-65 16-68 5030 49-72 E.A.C. 1374... Jan. 8 4 20 27-20 1-89 25-31 125 2 4-33 152 2-81 6 9 27-19 1-88 25-31 5-38 1-74 364 30 26-92 1-56 25-36 9-01 5-26 375 25-33 30-32 3-73 7-64 6 Tiiuri B.A.C Jan. 7 4 21 31-33 1-82 29-51 71 5 22-13 10-32 32-45 3* 1376. 17 31-34 1-76 29-58 22-23 10-14 3237 23 31-28 1-71 29-57 21-17 10-03 31-20 31 31-21 1-63 29-58 22-18 9-87 3205 29-56 29-58 3202 30-85 B.A.C. 1411.. Jan. 8 4 26 52-36 2-01 50-35 131 26 14-84 229 12-55 6 23 52-05 1-76 50-29 18-49 5-28 13-21 29 j 20-98 6-20 14-78 50-32 50-26 13-51 12-00 a Tauii Jan. 7 4 28 56 94 1-84 55-10 73 44 8-40 9-52 17-92 1 15 57-15 1-80 55'35 6-54 9-29 15-83 30 56-93 1-66 5527 8-97 8-88 17-85 31 56-86 1-65 55-21 8-68 8'8-i 17-52 Fob. 1 56-80 1-63 55-17 7-95 8-82 1677 55-22 55-26 17-18 15-60 B.A.C. 1471 ... Jan. 23 4 39 22-62 1-72 20-90 117 48 19-33 2-59 16-74 6 24 22-47 1-70 20-77 19-59 2-70 16-89 29 22-38 1-63 20-75 21-74 3-44 18-30 30 22-41 1-61 20-80 2063 3-58 17-05 Feb. 1 22-32 1-58 20-74 21-36 3-84 17-52 # 20-79 20-53 17-30 | 1 B.A.C. 1513 ... Feb. 1 4 47 26-50 1-64 24-86 24-95 124 26 45-92 5-13 4079 40-40 6 i Aurigas Jan. 23 4 49 5-03 204 2-99 57 1 32-38 13-01- 45-42 3 24 4-90 2-04 2-86 32-13 13-10 45-23 30 5-03 1-97 306 31-09 13-32 44-41 31 5-01 1-95 3-06 31-83 13-35 45-18 2-99 2-96 45-06 44-71 fcee note at e.id of Introduction. 48 Mean Right Ascensions and North Polar Distances of Stars STAR. Date. R.A. at Observation. 3 jjj P Tabular R.A. N.P.D. at Observation. P Mean N.P.D. Jan. 1. Tabular N.P.D. Magnitude e Leporis Jan. 18 24 28 29 30 31 Feb. 1 5 19-73 19-48 19-66 19-48 19-40 19-43 19-47 1-81 1-75 1-71 1-K9 1-68 1-67 1-66 17-92 17-73 17-95 17-79 1772 17-76 17-81 112 32 13-03 13-12 14-43 15-14 12-97 13-34 15-38 0-39 1-43 2-04 2-18 2-33 2-47 2-60 12-64 1169 12-39 12-96 10-64 10-87 12-78 4 17-81 1775 12-00 11-30 B.A.C. 1605... Jan. 23 24 29 30 Feb. 1 5 5 9-25 9-23 9-10 9-07 8'95 2-14 2 12 2-00 1-96 191 7-11 7-11 7-10 7-11 7-04 145 8 63-18 62-55 62-14 61-61 6-04 7-06 7-26 7-62 57-14 55-49 54-88 5399 6 7-09 7-47 55-38 59-04 aAurigee Jan. 18 5 7 43-38 2-55 40-84 40-71 41 7 29-67 14-74 44-41 42-42 1 /3 Orionis Jan. 24 28 29 30 31 Feb. 1 28 5 8 42-38 42-38 42-26 42-16 4222 42-24 41-82 1-80 1-76 1-76 1-74 1-73 1-73 1-32 40-58 40-62 40-50 40-42 40-49 40-51 40-50 98 20 34-45 40-84 4008 40-50 40-54 39-97 42-96 169 1-23 1-12 1-00 0-90 0-79 1-10 3614 42-07 41-20 41-50 41-44 4076 41-86 1 40' 52 40-47 4071 39-42 B JL.C. 1679 ... Jan. 18 Feb. 1 5 17 5720 5695 1-85 1-74 55-35 55-21 104 2 37-37 39-55 1-31 0-71 38-68 38-84 6 55-28 55-15 3876 31-71 /3 Tauri Jan. 29 31 Feb. 28 5 18 37-01 36-91 3665 2-12 2-09 1-69 34-89 3482 3496 61 29 42-84 41-56 42-15 10-72 10-77 11-10 53-56 5233 53-25 2 3489 34-87 5315 51-93 B.A.C. 1713... Jan. 18 Feb. 1 5 22 32-55 32-29 1-90 1-75 30'65 3054 116 41 18-59 19-42 0-84 3-43 1775 15-99 6 30-60 31-37 16-87 27-32 8 Orionis Jan. 28 Feb. 28 5 25 48-31 47-81 1-86 146 46-45 4635 90 23 25-19 30-07 2-92 0-95 2811 31-02 2 46-40 46-45 29-57 28-30 Observed at the Sydney Observatory, 1878. 49 STAU. Date. B.A. at Observation. Correction to Jan. 1. & 14 STAR. Date. R.A. at Observation. Correction Jan. 1. Mean R.A. Jan. 1- Tabular R N.P.D. at Observations. Correction Jan. 1. Mean N.P. Jan. 1. Tabular N. Magnitude w Aquilse Aug. 19 19 12 8-94 3-57 5-37 78 37 15-53 8-25 23-78 5 3> 8-80 3-47 5-33 1345 9-54 22-99 Oct. 4 11-09 11-51 22'CO 5-35 5-33 23-12 23-98 B.A.C. 6592 ... Sept. 12 19 12 65-79 5-93 59-86 144 38 61-12 923 51-89 6 16 59-19 9-61 49-58 19 65-90 5-74 60-16 60-42 9-87 5055 20 65-71 5-71 60-00 61-18 9-95 51-23 60-01 60-21 50-81 52-38 S Aquilae Aug. 19 19 19 24-57 3-77 20-80 87 7 31-90 7-27 39-17 3* Sept. 12 24-45 3-52 20-93 28-50 900 37-50 16 24-32 3-47 20-85 27-97 9-17 37-14 19 2421 3-43 2078 2967 9-28 38-95 . 20 24-30 3-41 20-89 29-35 9-30 38-65 20-85 20-73 38-28 37-38 B.A.C. 6664 ... Sept. 19 19 21 42-93 3-89 39-04 105 20 52-86 3-79 5665 7 Oct. 4 52-28 3-59 55-87 3904 38-93 5626 6722 B.A.C. 6668 ... Sept. 12 19 22 40-62 4-01 36-61 36-13 105 36 25-10 3-85 28-95 3760 7J_ B.A.C. 6689 ... Sept. 12 19 26 15-41 5-49 9-92 138 21 40-01 5-83 34-18 6 i 16 15-42 5-41 10-01 42-66 6-20 36-4(5 Oct. 4 43-08 7-39 3569 10 42-53 7-56 34-97 9-97 10-92 35-33 33-77 7* 2 Sagittarii ... Aug. 19 19 29 21-50 4'60 16-90 4* Sept. 12 13 21-23 4-34 1689 115 9 2-31 2-40 1-61 1-56 3-92 3-96 Oct. 11 20-58 3-87 16-71 3-11 0-70 3-81 16-83 16-81 3-90 3-14 7 Aquilse Sept. 13 19 40 30-97 3-46 2751 79 40 44-96 12-76 5772 3 16 30-96 3-40 27-56 46-27 1296 59-23 19 30-94 3-36 27-58 46-95 13-15 60-10 25 44-66 13-45 58-11 Oct. 10 30-60 302 27-58 43-65 13-80 5745 11 30-65 3-01 27-64 46-05 13-81 59-86 27-57 27-57 58-75 58-50 68 Mean Right Ascensions and North Polar Distances of Stars Q 3 << S _ STAR. Date. R.A. at Observation. c ,_5 fi 1i pj JST.P.D. at Observation. i air-; fc c fe ji | 'S i 1 i IT | I h. m. s. s. s. s. , o Aquilae Sept. 12 19 44 53-31 3-51 49-80 81 26 57-19 12-59 69-78 H (Altair) 13 53-36 3-50 49-86 55-35 12-67 68-02 16 53-27 346 49-81 56-59 12-87 69-46 25 53-17 3-33 49-84 57-62 13-33 70-95 Oct. 10 52-98 3-12 49-86 53-85 13-60 67-45 11 52-90 3-07 49-83 57-16 13-67 70-83 49-83 49-83 6942 69-67 Aquilse Sept. 11 19 49 22-71 3-60 19-11 83 53 35-59 12-70 48-29 3i 12 22-76 3-59 19-17 37-37 12-74 50-11 13 22-85 3-58 19-27 37-08 12-77 49-85 16 22-70 3-54 19-16 37-78 12-84 50-62 Oct. 4 35-68 13-28 48-96 10 22-38 3-17 19-21 35-14 12-76 47-90 11 22-28 3-15 19-13 36-78 12-73 49-51 19-18 19-19 4932 48-24 B.A.C. 6864 ... Oct. 4 113 4 11-70 4-06 15-76 17-24 6 B.A.C.6889... Sept. 12 111 39 18-96 5-70 24-66 6 16 19 57 51-48 4-14 47-34 17-34 5-57 22-91 25 51-55 4-18 47-37 18-54 5-24 23-78 47-36 47-37 23-78 26-42 a 1 Capricorn!.. Sept. 11 18 20 10 57-11 57-26 4-14 4-13 52-97 53-13 102 52 53-77 52-54 9-48 9-48 63-25 62-02 4 53-05 53-11 62-64 62-26 o 2 Capricorn!... Sept. 23 25 20 11 21-01 21-16 4-02 3-98 16-99 17-18 102 55 9-18 10-75 9-42 937 1860 2012 3 Oct. 2 20-95 3-88 17-07 10-71 9-24 1995 4 9-72 9-19 18-91 11 20-82 3-74 17-08 11-74 9-03 2077 17-08 17-00 1967 18-10 p Capricorn! . . Sept. 11 20 21 58-43 4-34 54-09 108 12 47-55 9-23 56-78 5 23 58-18 4-22 53-96 26 58-38 4-17 54-21 Oct. 11 58-00 3-95 54-05 50-36 8-21 58-57 54-08 53-92 5768 56-14 B.A.C.7058.. Sept. 23 20 23 20-27 3-83 16-44 93 17 12-85 13-32 26-17 5 25 20-21 3-80 16-41 14-89 13-35 28-24 26 20-33 3-78 16-55 15-46 13-36 28-82 Oct. 2 20-15 3-69 16-46 13-68 13-41 27-09 16-47 16-68 27-58 22-79 Observed at the Sydney Observatory -, 1878. 69 Q _2 aj 3 d OH STAR. Date. R.A. at Observation. P Mean R.A. Jan. 1. PH 43 N.P.D. at Observation. V Mean N.P. Jan. 1. Tabular N Magnitude oCygni Sept. 24 20 37 19-10 2-82 16-28 45 8 54-60 23-60 78-20 1 Oct. 2 19-14 264 16-50 48-37 24-91 73-28 4 18-93 2-59 16-34 50-83 25-20 76-03 16-37 16-35 77-84 77-85 B.A.C. 7201... Sept. 23 20 41 21-79 3-96 17-83 95 28 12-12 14-35 26-47 4 24 21-74 3-95 17-79 10-82 14-34 25-16 25 21-93 3-93 18-00 10-10 14-36 24-46 26 11-17 14-37 2554 Oct. 2 10-95 14-37 25-32 17-87 18-06 25-39 24-89 B.A.C. 7239... Sept. 23 20 46 8 51 4-07 4-44 99 26 13-24 13-74 26-98 4* 24 8-41 4-06 4-35 12-09 13-70 2579 25 8-42 4-04 4-38 11-81 13-70 25-51 Oct. 3 8-28 3-95 4-33 10-13 1360 23-73 4-38 4-60 25-50 25-83 32 Vulpeculae Sept. 23 20 49 25-02 3-30 21-72 62 23 59-74 21-99 81-73 *! 24 24-85 3-29 21-56 61-64 22-16 83-80 25 24-80 3-27 21-53 59-86 21-54 81-40 Oct. 2 24-78 3-16 21-62 58-42 23-13 81-55 3 24-61 3-15 21-46 56-39 23-24 79-63 16 24-44 2-91 21-53 55-41 24-28 79-69 21-57 21-62 81-30 80-22 61 1 Cygni Sept. 24 21 1 29-03 3-15 25-88 51 50 33-09 2412 57-21 5* Oct. 1 29-07 3-03 26-04 30-82 25-31 56-13 2 29-13 3-02 26-11 32-91 25-45 58-36 3 29-04 2-99 26-05 31-60 25-61 57-21 16 28-77 2-73 26-04 25-89 27-14 53-03 26-02 25-54 56-39 59-20 CCygni Oct. 1 21 7 47-89 3-26 44-63 60 15 56-33 24-49 80-82 3 2 47-80 3-24 44-56 58-46 24-62 83-08 3 47-83 3-22 44-64 55-79 24-74 80-53 16 47-54 3-01 44-53 55-00 26-03 81-03 44-59 44-61 81-37 82-23 B.A.C. 7445... Sept, 24 21 19 46-44 4-54 41-90 112 56 7-62 13-38 21-00 4 26 46-49 4-53 41-96 8-19 13-24 21-43 Oct. 1 6-94 12-89 1983 3 46-27 4-45 41-82 5-55 1275 18-30 16 46-24 4-26 41-98 6-89 11-83 1872 41-92 42-15 19-86 17-84 Mean RigJit Ascensions and NortJi Polar Distances of Stars 3 4 3 Q T> \ O r-5 ,j . ri N.P.D. JrH On-- 1 ^ .2 STAR. Date. Observation. "8 a ~ at i h 3 ti% 4 1 i* g o H 8 a B.A.C. 7475... Sept. 24 21 24 56-67 4-99 51-68 124 28 40-21 10-96 51-17 6 26 56-58 4-97 5T61 Oct. 1 56-46 491 51-55 41-69 10-14 51-83 3 5636 4-88 51-48 39-96 9-92 49-88 16 56-37 4-67 51-70 42-28 8-57 50-85 51-60 52-33 5093 56-12 /jAquarii Oct. 14 21 25 12-09 3-89 8-20 96 6 6-91 17-79 24-70 3 15 12-04 3-89 8-15 7-23 17-78 25-01 NOT. 2 11-71 363 8-08 7-62 17-19 24-81 8-14 8-06 24-84 25-11 B.A.C. 7557... Oct. 29 21 37 45-09 4-45 40-64 4* NOT. 2 44-92 4-39 40-53 123 34 44-54 8-64 53-18 5 44-74 4-34 40-40 45-50 8-44 53-94 40-52 40-90 53-56 54-00 e Pegasi Sept. 26 21 38 15-36 3-84 11-52 2 x Oct. 3 15-35 3-76 11-59 80 40 35-93 22-67 5860 8 15-30 3-71 11-59 36-12 22-93 59-05 14 15-37 3-64 1173 37-37 23-15 60-52 15 15-27 3-64 11-63 3696 23-17 60-13 17 1526 3-61 11-65 3585 23-24 59-09 11-62 11-67 59-48 61-33 16Pcgasi Oct. 1 21 47 34-18 3-58 SO'60 64 38 27-77 25-85 53-62 5* 8 3427 3-49 30-78 27-67 26-73 54-40 14 34-22 3-42 30-80 27-03 27-35 54-38 15 34-14 3-41 30-73 2499 27-43 52-42 17 34-04 3-37 30-67 27-00 27-62 54-82 23 34-01 3-29 30-72 25-32 28-04 53-36 29 34-02 3-18 30-84 Xov. 2 3386 313 3073 26-12 28-49 54-61 5 33-74 3-08 30-66 26-13 28-55 54-68 30-72 30-71 54-01 54-09 a Aquarii Oct. 1 21 59 34-92 4-07 30-85 90 54 21-42 21-84 43-26 3 8 35-04 4-00 31-04 21-29 21-93 43-22 14 35-12 394 31-18 20-85 21-92 42-77 15 34-99 3-93 31-06 2236 21-91 44-27 31-03 30-95 43-38 43-00 Oct 17 22 36-97 5-38 31-59 09.9* 137 32 53-47 8-10 61-57 6239 2 B.A.C. 7702... Oct. 29 22 1 21-84 459 17-25 NOT. 2 21-84 4-52 17-32 124 38 4-47 10-30 1477 6 a 8 7-23 9-81 17-04 17-29 17-48 15-91 * aote at end of Introduction. Observed at the Sydney Observatory, 1878. STAR. Date. R.A. at Observation. 3 fj 5 96 93 94 69 47 22-39 120 35 20-33 119 52 58-51 17-762 17-548 17-410 37 6 1 93 2 3 51'99 3'302 38 39 1 B.A.C. 688 67 Ceti 5 3 96 7 32 25 2-644 2987 8 1 96 QT 121 17 48-63 96 59 8-37 17-028 16730 -40 B.A.C. 713 6 1 96 12 lO'OO 2-533 1 96 126 32 59 97 16-811 74 Catalogue of Concluded Mean Places, No. Name of Star. Mag. Number of Obs. 1 of R.A: Fraction of the 1 Year for Mean. Mean R.A. 1878, Jan. 1. Pre- cession in R.A. Number of Obs. of N.P.D. Fraction of the Year for Mean. Mean of N.P.D. 1878, Jan. 1. Pre- cession in N.P.D. 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 B.A.C. 742 |' J Ceti B.A.C. 788 B.A.C. 803 B.A.C. 809 y- Ceti B.A.C. 873 B A C 879 6 4 6 6 6 3 6 5 6 2k 4 6 6 6 4i 6" 3 6 6 5 3 2i 6 4| 5 3i 6 3i 6 1 6 6 4 6 1 1 6 2 6 2 6 6 2 1 6 4 4* 6 4| 3 5} 2 4 2 1 2 3 2 1 1 5 4 1 1 1 3 1 4 1 1 1 4 4 1 4 1 5 3 4 2 5 5 1 4 7 5 1 7 2 3 2 2 3 1 4 6 1 2 1 6 96 97 96 96 96 96 96 95 96 78 72 96 1-00 96 98 1-00 26 1-00 99 1-00 27 27 04 03 04 05 04 05 05 06 07 08 07 07 07 05 09 06 11 06 12 08 05 10 11 05 : ii 15 is li. m. X. 2 17 55-01 21 40-42 28 2-05 30 53'92 31 54-93 36 58-69 42 37-10 43 59-32 51 54-49 55 54-17 3 4 39-25 9 52-61 11 9-80 14 30-33 18 14-85 22 50-24 27 10-95 29 40-50 32 10-33 37 24-12 40 13-97 52 20-27 59 7-55 4 5 54-64 12 51-23 13 16-65 20 25-33 21 29-56 26 50-32 28 55-22 39 20-79 47 24-86 49 2-99 5 1781 5 7-09 7 40 84 8 40-52 17 55-28 18 34-89 22 30 60 25 46-40 27 22-65 32 15-30 35 13-94 48 33-97 52 8-65 6 36-32 11 15-15 15 34-81 + 2-629 3-181 2-500 2-590 2-495 3-102 2-440 2-506 2-415 3-129 3-420 2-358 2-472 2360 3-226 2-329 2-823 2-405 2-451 2-386 3-553 2-794 3-667 2-923 3-681 2-266 2-224 3-488 1-991 3-436 2-412 2-203 3-895 2-536 1-212 4-423 2-880 2-744 3-790 2-411 3064 1-867 2-140 2-179 3-246 1-325 3 426 2-311 3-632 a 4 2 1 2 4 2 1 2 (! 4 1 I 1 3 1 4 1 1 1 1 4 1 4 1 6 a i 8 5 :> 1 4 7 1 1 7 2 8 2 2 3 1 1 (1 1 2 2 2 <; 3 4 pj ED 96 97 96 96 96 96 96 95 96 81 72 96 1-00 96 98 i-oo 26 1-00 99 1-00 27 27 04 03 04 05 04 05 05 06 07 08 07 07 07 05 09 06 11 06 12 08 05 10 11 05 29 11 15 27 14 27 13 29 28 14 14 18 120 25 16-16 82 5 16-78 125 11 13-90 120 34 38-48 125 6 0-12 87 16 47-75 126 3 35-72 122 55 6-63 125 52 11-52 86 23 24-84 70 44 10-33 126 44-22 121 16 42-86 125 26 50-22 81 24 7-28 126 6 22-32 99 52 21-21 122 16 59-25 120 13 56-36 122 19 43-95 66 16 26-57 103 51 25-78 62 43 51-53 97 9 27-33 62 56 36-C2 124 5 50-30 125 2 3-73 71 5 32-02 131 2G 13-51 73 44 17-18 117 48 17-30 124 26 40-7!) 57 1 45-06 312 82 12-00 145 8 55-38 44 7 44-41 98 20 40-71 104 2 38-76 61 29 53-15 116 41 16-87 90 23 29-57 132 23 35-06 125 8 20-76 124 8 25-24 82 37 4-33 142 39 49-20 125 17 50-30 75 13 9-50 119 44 53-99 125 6 3-54 67 25 33-45 126 38 41-50 142 37 45-07 122 30 16-26 126 8 31-08 73 29 55-53 106 33 3-21 127 38 43 76 16-531 lij-321 15-915 15-862 15-807 15-339 15-214 15-136 14-672 14-320 13-883 13-556 13-473 J 3-255 13-007 12-700 12-360 12-230 12-057 11-688 11-424 10-480 10-092 9-644 9-038 9-004 8-442 8-356 7-931 7-589 6-912 6-246 6-087 5-094 4-757 4-106 4-432 3-660 3-402 3-265 2-941 2-844 2-422 2-162 0-997 0-687 -0-595 + 0-075 0-984 1-058 1-505 1-731 1-857 2-056 2-568 2-718 4-706 3-656 B.A.C. 923 a Celi 8 Arietis B.A.C. 1015 B.A.C. 1019 B.A.C. 1042 o Tauri B.A.C. 1082 e Eridani B.A.C. 1109 B.A.C. 1121 B.A.C. 1150 ij Tauri y Eridani 41 Tauri o' Eridani < Tauri B.A.C. 1333 B.A.C. 1374 B.A.C 1376 B.A.C. 1411 a Tauri B.A.C. 1471 ... B.A.C. 1513 t Auriga? Leporis B.A.C. 1605 aAuriga? Orionis B.A.C. 1679 Tauri B.A.C. 1713 8 Orionis B.A.C. 1745 B.A.C. 1781 a Columbse a Orionis B.A.C. 1917 B.A.C. 1922 v Orionis B.A.C. 2027 B.A.C. 2034 fj. Geminorum B.A.C. 2079 a Argus B.A.C. 2109 B.A.C. 2158 7 Geminorum a Canis Majoris B.A.C. 2225 1 t ? 6 1 ... 13 21 14-65 1-330 J 2 14 13 16 30 39-85 39 46-15 42 1-37 3-466 2-646 2-061 for 1878, Jan. I, of Stars observed in the Year 1878. No. Name of Star. Mag. Number of Obs. 1 of K.A. Fraction of the 1 Year for Mean. I Mean K.A 1878, Janl. Pre- cession in E.A. Number of Obs. j of N.P.D. Fraction of the Year for Mean. Mean N.P.D. 1878, Janl. Pre- cession in N.P.D. i pj 7*. in. s. j s. / // " 99 B.A.C. 2251 51 5 -18 6 45 46-87 + 2-271 6 18 121 34 54-11 + 3-980 100 B.A.C. 2252 R 2-184 4 28 i 124 13 27'16 4-027 101 e Canis Majoris 21 8 16 53 49-92 2-357 8 16 118 48 25 66 4689 102 7 Canis Majoris 4 7 18 58 14-38 2-717 7 18 105 27 16-37 5-054 103 8 Geminorum 31 6 20 7 12 50 16 3-591 7 20 67 47 42-11 6-289 104 B.A.C. 2443 6* 5 19 17 3090 2.0>7X zyo 6 19 122 21 20-02 6654 105 o 2 Geminor I* 5 21 26 48-91 3840 5 21 57 50 45-27 7-499 10G B A.C. 2496 6 4 18 27 45-53 1-360 g 18 144 8 32'40 7-491 107 a Canis Minoris ... 1 4 22 32 5482 3-143 8 22 84 27 50-97 8993 108 B.A.C. 2538 6 4 20 34 48-38 2-745 5 20 101, 58 57-14 8-061 109 B Geminor 2 4 21 37 50-94 3-679 4 21 61 40 52-85 8-368 110 B.A.C. 2568 6 3 21 39 23-52 2-140 4 20 127 54 39-89 8-428 111 B.A.C. 2600 61 4 20 43 56-16 2-343 5 20 121 18 50-16 8-786 112 B A.C. 2629 5 5 22 47 42'31 2-258 5 S2 124 23 58'53 9'081 113 6 Cuucri 51 3 21 56 1'42 3'693 3 21 61 51 55-30 9-797 114 B.A.C. 2696 5* 2 22 57 50-05 1-485 3 21 143 48 47-07 9-862 115 15 Argus "Nayis"... 3 5 23 8 2 20-81 2554 (i 22 113 57 12-72 10-147 116 B.A.C. 2769 5 4 24 7 43-52 2-760 5 23 105 25 18 01 10-674 117 B.A C 2774 5 1 27 8 53'32 2'265 4 28 125 32 54-52 10-693 118 B.A.C. 2820 6 3 22 18 46-43 2-219 a 23 127 53 37 00 11-414 119 Lacaille 3298 7 4 24 18 47-63 2-476 4 24 118 34 39-70 11-418 120 B.A.C. 2843 6 3 22 22 22-16 2-414 5 23 121 16 1^-49 11-672 121 i\ Cancri 6 4 24 25 39-04 3-477 5 23 69 8 45 71 11-966 122 B.A.C. 2929 51 5 24 34 14-68 2-848 6 24 102 2 43-39 12364 123 B.A.C. 2935 5 1 27 35 19-75 2-331 :; 28 124 52 31-4S 12-575 124 B.A.C. 2960 6 2 25 37 44-39 1-479 VI 25 147 6 37-44 12-738 125 B.A.C. 2974 6 2 25 40 10-23 2-311 126 e Hjdrte 4 2 23 40 18-90 3-182 2 23 83 8 5 93 12-953 127 B.A.C. 3006 6 6 23 44 54-19 2-438 7 23 122 19 32-92 13-219 128 K Cancri 5 3 25 9 1 5-30 3'256 6 24 78 50 31-59 14 252 129 83 Cancri 6 6 24 12 10-26 3-355 7 24 71 46 43-72 15075 130 a Ily drsc 2 6 24 21 35-53 2-947 ! 24 98 7 50-51 15-423 131 e Leonis 3 2 25 38 55-41 3-417 2 25 65 39 54 03 16-394 132 TT Leonis 41 4 30 53 45-90 3-175 ! 30 81 22 18-00 17-120 133 a Leonis 1 3 32 10 1 52 37 3-200 3 32 77 26 15-86 17-440 134 y Leonis 2 5 31 13 14-70 3-315 5 31 69 32 32-36 18-069 135 p Leonis 4 5 31 26 23-14 3-165 6 31 80 4 0-48 18-436 136 1 Leonis 6 2 31 42 5060 3-157 3 32 78 48 35-60 18-9-49 137 B.A.C. 3763 6 4 34 53 28-31 2-824 5 34 123 4 57-93 19-215 138 X Leonis 41 3 33 58 43-41 3-098 4 34 82 19-52 19-4*2 139 S Leonis 21 4 34 11 7 37-12 3-201 5 34 68 48 31-49 19-673 140 5 Crateris 31 5 34 13 14-52 2-995 5 34 104 7 7-44 19-459 141 u Leonis 41 6 35 30 42 14 3 069 7 35 90 9 2-86 19860 142 )3 Leonis 2.\ 10 35 42 50-16 3-064 11 35 74 44 48-27 20-098 143 e Corvi 4" 12 37 12 3 51-02 3-076 U 37 111 56 29-48 20-041 144 i8 Chantaleontia ... 5 10 51 11 12-92 3-353 5 1 59 168 38 4-15 20-039 145 t\ Virginia 31 6 39 13 39-87 3-065 8 39 89 59 21-06 20-019 146 B.A.C. 4183 6 4 39 18 56-10 3-148 4 39 124 31 38-57 19-986 147 B.A.C. 4214 6 4 51 23 54-43 3-131 4 51 113 1 19-57 19-945 148 B.A.C. 4233 .... 6 3 51 28 6-48 3-230 1 51 133 59 35-14 19-903 149| Corvi 24 12 38 28 58-80 3-133 K 38 112 43 19-89 l'.M>7l< 150 y Virginis 5 36 32 56-98 3-0.07 1 36 97 19 28-79 19-847 151 7 1 Virginia 4 1 35 35 28-72 3-075 6 39 90 46 46-71 19-814 152 y~ Virginia 3^ 1 37 :{,-> 2SS1 3-075 3 39 90 4(5 52-45 j 19'Sl I 153 y Virginia mean ... 4 9 45 35 28-74 3-038 4 51 90 46 49-41 19-864 154; a Canum Vc'naticor 21 8 42 50 19-21 2-814 ! 42 51 1 21-37 1!>512 155; 6 Virginia 41 9 45 13 3 38 06 3-100 10 44 94 53 15-38 10-326 156: a Virginia 1 8 43 18 45-99 3-151 8 43 100 31 2805 18-920 7 6 Catalogue of Concluded Mean Places, No. Name of Star. Mag. Number of Obs. of R.A. >< Mean R.A. 1878, Jan. 1. Pre- cession in R.A. I of N.P.D. Fraction of the 1 Year for Mean. | Mean N.P.D. 1878, Jan. 1. Pre- cession in N.P.D. pj h. m. s. s. m ' " " 157 ^Virginia 4 6 43 13 28 28-66 + 3-053 3 42 89 58 18-60 18-518 158 BAG 4541 6 3 46 30 2'57 3-320 5 '45 115 52 20'34 18-526 159 B.A.C. 4601 3* 4 45 42 11-45 3-574 5 45 131 5 4482 18-093 160 n Bootis 3 4 45 48 52-56 2-858 4 45 70 59 25-62 18-193 161 T Virgin is AL 1 47 55 26'33 3'049 1 47 87 51 53-41 17-632 162 B.A.C. 468G 2! 4 45 59 30-49 3-551 5 45 125 46 7 64 17-389 163 B.A.C. 4722 6 2 1 44 14 8 40-76 3-298 1 44 107 37 51-91 16-975 164 a Bootis 1 3 46 10 5-74 2-734 1 47 70 10 56 76 18-837 165 B.A.C. 4740 6 fi 45 12 5-70 3-415 5 45 115 15 5088 16 814 166 B.A.C. 4760 6 4 45 15 37-67 3-735 4 45 131 41 44-79 16-643 167 p BoStis 4 6 47 26 34-26 2-587 6 47 59 5 33-79 15-950 IBS B.A.C. 4852 5 4 46 36 12-02 3-653 4 46 124 38 50-69 15-574 169 e 2 Bootis 3 7 51 39 39 60 2-619 6 52 62 24 40-72 15-371 170 B.A.C. 4880 5 3 45 40 37-65 3-484 3 45 115 34 30-68 15-326 171 a Librse 3 5 53 44 7-85 3-309 5 53 105 32 2-97 15-186 172 i|/ Bootis 5 2 51 59 13-12 2'570 2 51 62 34 33-66 14-227 173 B.A.C. 4973 5 4 54 15 37'85 4-006 6 53 134 48 32-21 14-141 174 B.A.C. 5032 4 56 10 24-56 3-635 5 54 119 42 56 53 13-521 175 Librse 2| 3 47 10 26-62 3219 2 47 98 55 56-46 13-528 176 B.A.C. 5118 3 4 51 27 0-81 3975 5 53 130 45 17-63 12-414 177 a Carouse 2i 2 55 29 31-38 2-539 2 '55 G2 52 26-75 12-310 178 B.A.C. 5151 2 55 31 9-83 3-670 4 54 119 22 29-29 12-127 179 a Serpentis 2| 3 57 38 15-50 2-951 3 57 83 11 23 77 11-576 180 B.A.C. 5202 6 1 55 39 34-18 3-910 3 54 127 31 41-33 11-536 181 /8 1 Scorpii 2 6 54 58 20-66 3-478 6 54 109 28 12-08 10-170 182 5 Ophiuchi 3 7 56 16 7 57-19 3-136 (i 55 93 22 44-03 9-547 183 a Scorpii 1 6 57 21 55-63 3-669 6 57 116 9 33-49 8-350 184 B.A.C. 5533 6 3 59 27 48-03 4-201 8 59 132 36 16-55 7-852 185 B.A.C. 5538 5 2 59 28 20-86 3-933 2 59 125 6-72 7-808 186 CHerculis 3 4 58 36 41-33 2-263 5 58 58 10 30-89 6-679 187 B.A.C. 5633 G 3 59 42 19-02 3644 8 59 114 25 29-49 6-668 188 K Ophiuchi 4 8 58 51 53-64 2-834 7 59 80 26 3-70 5-850 189 a 1 Herculis 3a 6 60 17 9 507 2-731 5 60 75 28 9-67 4-377 190 Ophiuchi 34 8 61 14 31-07 3-677 8 61 114 52 33-26 3-931 191 d Ophiuchi 4 2 60 19 33-85 3-823 I 60 119 45 17-35 3-520 192 a Ophiuchi 2 9 60 29 16-29 2-779 8 6.1 77 21 0-83 2-879 193 /j. Hereulis 4 9 62 41 41-05 2-344 11 62 62 12 25-51 2-339 194 B.A.C. 6055 6 4 60 47 53-38 4-373 l 60 134 19 7-04 1-060 195 B.A.C. 6088 6 3 59 54 31-16 3-632 8 59 112 46 29-75 + 0-480 196 fj. Sagittarh 31 12 65 18 6 28-03 3-584 V2 65 111 5 19-80 - 0-559 197 a Octantis 5J 8 66 20 55-86 109-708 10 65 179 16 33-62 2-138 198 B.A.C. 6277 6 3 64 22 22-60 4-267 Q 64 131 59 30-65 1-956 199 B.A.C. 6330 64 2 72 30 0-24 4-542 2 72 138 45-71 2-618 200 a Lyrse 1 11 66 32 48-43 2-030 11 66 51 19 44-18 3-142 201 B.A.C. 6415 6 5 71 44 48-63 3-603 5 71 112 3 46-43 3-897 202 /3 1 Lyrse 3 6 65 45 34-56 2-212 6 65 56 46 40-66 3-933 203 B.A.C. 6439 7 3 71 47 41-66 3-807 4 71 119 21 53-47 4-144 204 CAquilse 3 3 68 59 48 15 2-752 4 68 76 19 0-59 5-106 205 B.A.C. 6323 5 3 71 59 51 03 4-180 4 71 130 41 0'61 5-178 206 w Aquilse 5 2 65 19 12 5-35 2-814 8 68 78 37 23 12 6-227 207 B.A.C. 6392 6 3 71 13 O'Ol 4-858 I 71 144 38 50-81 6-280 208 S Aquilse 3J 5 69 19 20-85 3-023 5 69 87 7 38-28 6-907 209 B.A.C. 6664 7 1 74 21 3904 3-415 2 74 105 20 56-26 6-994 210 B.A.C. 6668 71 1 70 22 36-61 3-421 1 70 105 36 28-95 7-074 211 B.A.C. 6689 6 2 71 26 9-97 4-468 4 74 138 21 35-33 7-363 212 /i 3 Sagittarii 3 70 29 16-83 3-655 3 72 115 9 3-90 7-639 213 7 Aquilse 3* 5 73 40 27-57 2-853 G 73 79 40 58-75 8-513 214 a. Aquilse H 6 73 44 49-83 2-928 6 73 81 27 9-42 9-237 for 1878, Jan. r, of Stars observed in the Year 1878. No. Name of Star. Mag. Number of Obs. 1 of II. A. Fraction of the 1 Year for Mean. Mean R.A. 1878. Jan. 1. Pre- cession in E.A. Number of Obs. 1 A Fraction of the 1 Year for Mean. Mean N.P.D. 1878. Jan. 1. Pre- cession in N.P.D. h. m. x. .t. 7-. / // 215 Aquilse 82 G 73 19 49 19-18 + 2-947 7 73 83 53 49-32 -8739 216 B.A.C. 6864 6 3-571 1 76 113 4 1576 9'580 217 B.A.C. 6889 6 2 72 57 47'36 3-534 8 71 111 39 23-78 9-859 218 a 1 Capricorni 4 2 70 20 10 53-05 3-329 2 70 102 53 2-64 10-840 219 a 2 Capricorni 3 4 75 11 17-08 3-331 5 75 102 55 19-67 10-872 22f p Capricorni 5 4 73 21 54-08 3-425 2 73 108 12 57-68 11-631 221 B.A.C. 7058 5 4 74 23 16-47 3-135 4 74 93 17 27-58 11-736 222 o Cygni 1 3 75 37 16-37 2-042 8 75 45 9 17-84 12-708 223 B.A.C. 7201 4 3 73 41 17-87 3-170 5 73 95 28 25-39 12-977 221 B.A.C. 7239 4i 4 73 46 4-38 3'238 4 73 99 26 25-50 13-292 225 32 Vulpeculffi *j 6 75 49 21-57 2-554 6 75 62 24 21-30 13-508 226 61' Cygni 5| 5 75 21 1 26-02 2'673 5 75 51 50 56-39 17-483 227 C Cygni 3 4 76 7 44-59 2-548 4 76 60 16 21-37 14-583 228 B A.C. 7445 4 4 75 19 41-92 3-436 5 75 112 56 19-86 15-345 229 B.A.C. 7475 6 5 75 24 51-60 3-646 4 75 124 28 50-93 15-632 230 j8 Aquarii 3 3 80 25 8-14 3-161 8 80 96 6 24-84 15-618 231 B.A.C. 7557 41 3 83 37 40-52 3-588 2 83 123 34 53-56 16-310 232 e Pegasi 21 6 77 38 11-62 2-948 6 78 80 40 59-48 16-338 233 16 Pegasi 51 9 80 47 30-59 2-727 8 80 64 38 54-01 16-787 231 a Aquarii 3 4 77 59 31-03 3-080 4 77 90 54 43-38 17-327 235 a Grruis 2 1 79 22 3T59 3'811 1 79 137 33 1-57 17-211 236 B.A.C. 7702 6i 2 83 1 17-29 3-529 2 85 124 38 15-91 17-423 237 Aquarii 4 4 80 10 23-69 3-169 4 80 98 23 25-68 17-775 23* B.A.C. 7790 5 2 81 14 52-22 3-313 1 79 112 12 34-17 17-981 239 B.A.C. 7795 3 3 81 15 21-35 3-093 2 83 92 7'27 17-999 24( B.A.C. 7828 4 4 80 21 58-24 3-609 4 79 134 7 4-37 18-247 241 rj Aquarii 4 6 82 29 5-17 3-082 5 81 90 44 46-89 18-438 242 C Pegasi 3 3 82 35 22-67 2-987 8 82 79 48 19-57 18704 67 Aquarii (5 1 77 36 52'24 3-136 244 B.A.C. 7930 '""'.'.'.'. 6 2 81 38 50-57 3-297 2 81 115 52 4012 18-810 245 B.A.C. 7980 3 1 80 48 10-38 3-194 1 80 106 28 6-68 19-077 2-W a Piscis Australia... 1 2 83 50 54-35 3-326 8 82 120 16 6-23 18-969 247 a Pegasi 2 3 83 58 41-03 2-984 8 83 75 27 4-69 19-321 248 B.A.C. 8035 5 1 80 23 8 0-60 3-108 1 80 96 42 26-18 19-540 249 7 Piscium 4| 2 85 10 50-53 3-106 2 85 87 23 3'69 19-585 250 K Piscium 51 2 85 20 40-72 3-075 2 85 89 24 44-89 19-640 251 B.A.C. 8232 5 2 86 33 27-38 3-086 8 85 104 53 48-01 19-919 252 8 Sculptoris 5 3 87 42 34-33 3-137 8 87 118 48 16-89 19-896 253 B.A.C. 8313 61 1 91 48 58-05 3-113 1 91 122 35 59'87 20-031 254 w Piscium 41 5 87 53 2-72 3-078 6 86 83 48 4371 19-914 Sydney : Thomas Kichards, Government Printer 1881.