■rT^n.L**e^' 



■iytJi**- 



Kh y^h M7L'?t^':^ti^"^^V=r ^'^^t'^i^ -^ 



^^- — ^xn^^ Lh i" \-—^ ~^i.~ "^ ^ 



i^4:r^=^^" 



^:^^>i^3-^-| : -■*:' 



r--— ]^-..x*-i 



j^'p**>JAJ fr"^-,v - 



ASTRONOMICAL PAPERS 



Time of the perihd. Aug. 8. 8096 



iiubtr:ia June'lj. 2916 



A^^.l ^c"^^unlX.ys 54. J18 Log. 1,736540 

 Add the log. of the daily mean motion, ^263630 



H9 



Mean motion, 100,04 

 Angle correiponding 90'^. o^ 54'^ 

 Which fub. irom? /■ o 



the periliel. j ■^J'^' ^P' ^^ 



Comet's heliocent, 



long-. 8s. zC^, i8^ 34''=a66. I8..34 

 Qdo. 8. 24. 44. 53 



differ, r. 33. 41 



Let S, (Plate 1. Fig. 3.) he the 

 place of the Sun; Ej'the place 

 of the Earth; and C, of the 

 Comet. 



Log. 2,000170 

 Log, pro diflantia a Sole 



Subtradl, 



0,301260 

 ,202335 



Comet's difl. from ^CS 125,581 

 iiarth's diflance from ditto loi 627 

 Secant, r'. 33'. 4 l^'^Rad. fub. ' 



Loj^. 0,098925 

 Log. 0,007011 



161 



r? r 'r.. ^°^'-^90 Log. 2,oo68fo 



Sub. from CS^i25,5Si +Tang. 1^. 33'. 41'/ 8,435490 



Rem. CP 



23,991 



Sum, 10,442340 

 Sub. CP. Log. 1,380048 



Remains Tang. ECS===6'^. ss^. 3// 

 -(-heliocent.long. Sy. 26°. iS'.34'' 



9,06229:^ 



The fum is the geocent. place of the Comet, 



9^-^°-S3'37'' 



Long, of the defccnding node los. 14". 2V. 45" 

 Sub. helioccni. long, of Com. 8, %6. 18. 34 



Argument of latitude, 48. 4. 11 

 -|-Thc Sine of the inclinat. of orbit I, 40. c 



Ra^l. =Sinc helioccnt . latitude, 



I. ai. 9 



Sine, 9,871548 

 8,5oi4i4 



8,37300a 



As the Codncof 6°. ^s'- 3"~ECS 9,997126 

 Is to Radius - - * jq^ _ „ 



So is CI*=a3,99i - - - 1,382921 



To CU^ZiasoiB 



As CE=24,i5028 

 To CS==:i25,58i 



So is tang, hcliocent. lat, l' , ai'. 



9 



// 



1,380048 



2,098925 

 8,373091 



To the tang, of the 

 geocent. iat 



} 7^ 



o^ 



10,472016 

 9,089094 



Hence the vifible place of the Comet was l^ a^. 53'. 37" with 7°. c/ North latitude. The 

 right alcenfion and decimation I find as follows. 



. ^^\^] (^^^^5 h ^^f; 4) be the place of the Comet; A, the firft point of Aries; AP, a por- 

 tion of the cchi^tic; CP perpendicular to it; AR, part of the equator; and CR, perpendi- 

 cular thereto Then flull AP be cquaUo the complement of the Comet's lonKitudc-87« 7' 

 an. PC, Its North Iat.tudc^7^ o'. AR, the complement of right afccnfion : and RC 'the 



declination. ' "^ '■^^, ^^^^ 



CoIineAP=87^. 7/ - - - - 8,701589 

 i^Cofme CP=:=7. o - - - - 9y99(^l5X 



— Rad-^^Cofin, AC -^8 7'^, 8^ 2o^'-=8,69834o 



Rad. 4-Sine 7^. o' - 

 ■Sine 87''. 8'. ao'' - 



19,085895 

 9)999458 



.=:Sine - - 



Vol. L 



- 7^« I', - - - 9,o864'?7 



U 



Sine 



■^ 



