CIHM Microfiche Series (Monographs) !CMH Collecljon de microfiches (monographles) Canadian Institute for Historical Microreproductions / Institut canadien de micronaproductions historiques Technical and Bibliogra^Jh■ J.,V a\ V The Institute has attempted to obtain the uc copy available for filming. Features of t'li- ;c-_ may be bibliographically unique, which m ■/ alt ' en the images in the reproduction, oi , ri -h nay significantly chan'je the usual method of filming are checked below. 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Opposing pages with varying colouration or discolourations are filmed twice to ensure the best possib'e image / Les pages s'opposant ayant des colorations variables ou des decolorations sont filmees deux fois afin d'obtenir la meilleure image possible. Additional comments / Commentaires supplementaires: Continuous pagination. This item is filmed at the reduction ratio checl• Dominion Observatory OTTAWA W. V. Kino, C.M.G., LL.l)., Director. Vol. II, No. 3 Orbit of CO Cassiopeiae REYNOI.l) K. VOLNG, Ph. O. D O T r A W A GOVKRNMBNT PbINTING UurBAL' 1915 CAl MT 40 3 P02-03 tCOLt HULYILCHNIQUE BlbLIUIHLgu^ bCOLt PULVItChu.l^UL DlDuivJinn^uc DEl'ARTMKM OF Till: IMI.RIOK II. IN U I ll.«]n, V.n, l.r. W \\. ( ..HV. t.M.O . ;<./M,(B )/iilii(»r. PUBLICATIONS .X Dominion Observatory OTTAWA W. F. King, C.M.C, I.L D., Directs. Vol. II, No. 3 Orbit of CO Cassiopeiae BY REVNOID K.. YOLNG, Ph. U. o r T A W A (loVLIiSMKNT PkINTINO BuKEAU 1915 7tj78:i— 1 oi.i'.ir "I - ( \>si(»i'i,i Y. in 1!1 ^ MH II K li'l M.. 1''' "• !,,(. nn- .-.-'' U|- I'.'.' -- :u,no„n,,.,l l.s A,h,n. n, P.MJ' l.Mv tu- ■ ■ -- I,., „,,.,,,aiun .iuiini; l'.)i:;. I'-'H. I'-M... I.a^'' I""' >|icclin;ir:iin-, taken at i used ill (Ificiiiiiiiiii;; lli' "i'"' ,\ l,r luiltiid lioin Tal'li' Til.' jivii.'i-al IVatun- '<\ llir ^MrllUlu llia\ .l,„.l, ..nn,a„. nl,.,- Iru...^- .a^ .-len.- 1, u^.l, - .• n;'''"^ ^ and ,1„. nu.nl,,.,-..- -un,.^ .a.h In,,- ... a.uv, 1 h- ,v.,lnal , . lin.. is ,1a. Muan ..Lelua,.. ,„■ an-lnn,..,.: ,„• all ,1a. ...MduaU ,., - h-U ,,„„ Tla. ~.pa,a,. .vM.luaU a,-, luu.al l,v M,l.,,ar„n. ,!>.. u-U.n^> u= „iv,.n l,v ,1a. l-lutr Iru.n ihr vrhu-ily a- ^^ivm \>y rUr Uur. •.\-ti'.|ilnHM ^il .i.iurn^il. vni :i.', |. IT •1 \HI,1, 1 CmLiiiiii Calciuln ll.'liuln lly.ln.tf.ii,. Siliim Silti-c'ii (■;ul..ill lliliiini. 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R.idial Vclority r.no Vcl ! \Vt li i:iO VpI, \\t :i2"! 2tl ',1 :U-4, 11 H Vi '.> - 27-4: - 43 S' :i.')- :i'.i- Vrl \Vt (•>4:i4 Vrl. \Vt (X'l n-2N 14i> 4Sti -- 4:i tl -i- 1.-, .w -^ (m - 2,S 21 1 I - 4r B| i - :i4-2' S - 5! S 5 - :if)l 1- - ',2 1 - ;is.7 ', 41 4 l.-iOl o:. 2S nil'; Vcl. I \Vt t>4:'S Vi'l. \\t 23 Oi 1 sso'i i 25 fi i 2rv<» 1 300 1 - 2o0; J - oo' l.iO S fi467 Vrl, - .Cit'i 1 - 11-31 1 - 29-41 J 2S-1 2."i ■ a 34-0 - 2S-2 27 no 14-0."> 05 2S 13-fi - 10 r 14 -(W + 003 - 0-28 2 2 27 • 13 -HS 0<1 2N - 14 21 -21 I - 27-20 + 13 «(> + 01 - 0-2>> 13-S 96 IM III. I. AIM'S- >UMIMU.N OU.SKUVA I < '1(Y. Mi;\>ri!i.> II 1 u; (■,\>Slll|'l n; <'n„lirn„il \,i Wi '•■'! ^\' li'.lfiS ■ iVJ.'i 4n.>i) ;f''j uni N'l) 1|:!M>17 i:uo f,:il -1171 I'.Ti' l|sl Kill Wi-iizhti-ii llir:ill \ , \ , UailiMl Velocity ".I ■ .". SI! - '.Ml , i;i 2.'. , II If. II .N + :i*> I) (1 V.I Wi V.l Wi \'l \^' 1 .• 1 7 1 ; i.i '.I ; 1 1 \ 4fl! 1 + 3 .^ II 7 . 11 - 11 I'lii 11 li II ii'i nil.' II J"^ ^- n 2^ - 11 '' • '■'■'■! - .v6l S ■I'.i 1 1 21 II ; - - (I J> 21-5 I ■jj .". 1 27 1 1 V.l W iK",:iO WI Wi :«■) 2 112 2'.' a 1 :io '.I ! :U u, I ~ 2t 20 - :i:i 7 S 'I'l . t'. -Its - 11 (VI - II O'.l - (1 2-> - 11 2-- - l.Vf. - 27 1 I'.i 2 i .-,n 7 1 .-,1 I 1 - .■ill 1) II 07 -- II 11 - II 2'^ 44 OHHll OK u) ( A^SIOPKIK. 97 MKAStRfS OF u CASSU)I'F.l*.— rv-n/iniW. V(l I \Vi 11111 s'.tll 41JS Jll 4i:)M»17 4.'n7 :i 4:uo tini 4471 i'.7ii 44H1 4(K) mean V, Curv Kuilial Vfliicity - 47 II - 4S :, - :« 4 - ,Vi(» 4S-:i 4!l H 4S> .iis in n '.N \-rl. Wt ,',(1 '.I ■M\ I 4r, n'l i tin (I ; Vrl. 1 \Vt Vil Wt 114 + ^'S ,-,11 .■l lil nni + HI 1 + 20 4I \ I + 30 fi + 33 li; J + 25-7 1 I + 2H.8i I + 21<1 - 11)11 (K) - n .'K 2li 7 1(1 40 (13 02s Vfl , W I 1 2(1 >' i ■f 2-) -2 ; r 21 7 i + 2S-3 i tiWi.-) V, I , W < 112 Hi -r 21 7 - 10 '.Ifl - (Hi - . 2S + 13-4 + 3 1 I + (I I i + 113 ; - ;> i ■ 1 •' i + 111 2 1 t r. 2 ; + Hi 3 1 - 4 s v.i \\i It '^ 1 .-, li i 1 i; 1 11; 1 1 - li 2 - 12 ■20 - 12 4(1 + 001 - 111 - 2S - 2s 98 in Ul.UAllDN.-, ol- lUl. DOMINION i )LtM;i(\ A 1 1 Mf V. Ml \SI l;l^ 111 .1' <'A>>liiri M Cnnliiiiirrl. 4()2i'i :i.'i-' -lun VIII 4IJS Jll .(i:uni7 i;un f,:u 1171 (iVti 11^1 lull Wi'inhtctl IIM'.-ITI \", \ , (iirv. V.I. W H:i.li.il Vol.A'itv ^ 1 :i s ;, 117 1 III 7 ': V. I W 261 1 1 II .V 1 ■JO :> 1 ■j:. 1 11 1 Jl 1 Ol.'.t II II 0-2S 11 J \ . I W I JS !l 1 ',11 I. 1 ,1 ,: I 1 7J II iij (1 .N I'l 1) i (11 7 . ■Jl.l li ' 14 s . ■Js s 1 \,i \\I IS". i :iii t; ; - i:. 1 i II III - 48-S 1 :, ■ s 1 II 1)1) - toO :*2.;i, 35 ■3| :i->-4! :il :! 11) .ill I) (111 - 50-9 \\i 11 .!:i (I II') .■..' II II II Js oiiiiir • - 17 J ; - L'!! (i 1 - -J ti 1- - i;i 7 ; -M J :. - J5 7 - :i'i 1 - lis - I'.i '.1 1 1 - Jl 1 1 - '2 7 ' - 1'.) ; - 12 4 1 - _N 7 i 1 :i ~ (1 1)1 - II -.N - J.' ;i - 17-4(i - oos - JS Ml«:ill \ . \ J Cuiv l!u.li:ll - Ill 1 Vrli..ity IIIO ,., lUKMinNS OK THL UdMIMUN OU:ik,U\ M ' -in . :',,.,; ,|„. ..a,l,..M an.l .!„■ - .•.■,•.■,. pla,.-- . ,lur,y pnuM. U. ;;; ;'n:i .^^M.. ,lay. U,,. ,.....■..,. l. ,h. ....y-two ..lau. .ak... 1.M w.T.' .■.Mnl.i.ira into tl.ut.rn lu.nual [>huv>. Ndli.MAl. 1'1.A( T.S. Prellinlnaiy cU'iurnts ^^■vn■ uhtaim-d graphically, P =Uy'J2 days e =o:i o) = 53^ K =-311 km. 7 =24 82 km. r = 2,42U,42tJ -1 .J. I). and a lea.t-.,uan.s suhn.on wa< .ar.i.d through for all the elen.ent. P. save nlillir <>1 ^ r\»liil'i:i.K. 101 I'H>1.1!\ \'lli'\ I. Ill \ I |(i\S 1 •I 3.. 4.. S.. 6. 7. 8. 9. 10.. 11.. 12.. 13.. .Vllt O-.iO" tiH.'i T"*.*! SOj (l.')(l l.-iL' lOS II is:t I) Ml.-i 1 lis 1174 + o:ii - 1 JIM I II 171 + I) IIH + wo + D.M + luH - ()1>J - "xitl - !) (ILI) - II !li,li,t + IMMiit + MX) II. 1 1 1.; 7 III I'l^ II7II .;iii ri:!.'i 71> 71.1) ;_..-, ■■11 Mil u a.io I r,M; I ii'i7 II ii'i.'i II Jill II III! II JSO II :iM II I'll II .',711 II i;i;i II iHill ;U2 170 + 2 - 6 -f I - 1 - 4 + J II - I) I + 0-7 + JO + 2V, - 4 + 8 w.inhi I .'. H I .; II s 7 1 J 'I 1 II I II I II 07 WlllTC .1' = oy ■-= 5A' = A' 5. = Kou (1-r i^^^ MlHMAI. i:(^IV\TI(lN.- 12S00.r + .-)(% - lOMz - CSO/i + O-CAHq + 0-rw() = + 0;{7l'/' - ()12()7 + !)• 124 = + (il57j + ()()24/; - ()-22:)7 - 2-4U() = + (>-291/) - U127v + ;i-414 = + .lyrv/ - 2-211 =0 when 07 = ()■()() km. 6K = - 1 -46 km OC = 00 5u = - ;f 0:5 57' = - 0-3S ila\ The above corroptions lowered l"/;r- from T.j-O to .■■)1-,") ami aKreement between the re.sidual.s computed fiom tlie eiiliemeri- and tlie obser\atioii equations sliowed tliat further .^ohitions would leave the element.-; unaltered. IdJ I'l III n \iiii\-. lii im; iiii\ii\ii)\ dh-vhv \ imk^ I IN \l III MKiNTS. /' till '.!_' il;i\> :i() OOJt u. - I'.i U7 • I ■()> /\ -".t t;| km • r.i -, Jl S.' km. ■ II 11) T -MJil.rjii (12 .) I). . (.7 -; sin /- _'7,l'.l(»,(i(i(» km Wi' sill' ( (w + «/,,)•■ Kit O Till iiiiii\i(luiil iili^ci \ alion- Were i-cpn-riiicil i;ra|iliic;ill\ ami tiir ir^i(|iiai~ air >liiiuii ill Taiilrs I| aiul III Tlie |)ii)lial)lc iTiiir ul' a >iiinlr platr, iiu at Iclll idll lirillll ,!ii\fli to the Uciiiiil, i> '_' ,S kill 1 )(iiiiiiii()ii ( )t)S('r\ aiDi-y, Ottawa, IVliiimiy, iyi3. 3 -IBSU OOObLMbM S H- n_, s — /- /- / / \t / ^ • — -A \ \ ^ /^ \ "fl vJ r^"**" ~" u 1 1 V - 0., 3 '0 i ^0 i \ — ' — , — 1 Vflucity < iirvc uf « (';is>iupeui