.502 



Mr ROTHMAN-S OBSERVATIONS OF HALLEY'S COMET. 



APPARENT PLACES OF THE STARS OF COMPARISON FOR THE RESPECTIVE 



TIMES OF OBSERVATION. 



Date. 



Sept. 20 



28 

 30(a) 



(*) 

 Oct. 2 



4 

 5 



7 

 10 



11 



19 



23 



27 



Name of Star. 



Hist. Cel., p. 52. Mar. 4, 1794.1 

 transit at 6" . 8" . 48S5. / 



z Aurigae 



HisL Cel., p. 212, first star,» 

 and p. 273, Mars 13, firstl 

 star J 



6l Auriga?. 



Hisl. Cel., p. 208. A. \ 



a = 6".49°'.48»,5) 



58. Telescop. Herschel .' . . 



Hisl. Cel., p. 377. B. \ 



« = 7''.19"M3»,4) 



Piazzi VIII. 15 



2R. =10''.48"^58^ 4 1 for 

 N.P.D.= 25° 



58^ 4 ) for 

 33'.37"|1810. 



Mem. (le I'Acad. for 1790. 

 transit at 12'' . 39" . 35", 

 p. 333. A 



Hist. Cel., 46 Herculis. 

 1 Ophiuchi 



Hist. Cel., p. 290. B. 1 



transit at 17''. 8"". 32'. J 



Right Ascen- 

 sion. 



ft. m. s. 

 6.11. 30,9 



6 . 17 . 59,3 



6 . 22 . 53,8 



6 . 42 . 39,7 

 6 . 52 . 29,8 



7. 9.21,7 



7.22.21,3 



8.5. 32,6 



10.50.37,1 



12 . 41 . 24,3 



16.41 .57,3 

 16.46.12,7 



17.11. 9,6 



Declination. 



+ 30 . 2 . 1 

 + 30.35. 19 

 + 33. 8.11 



+ 38 . 41 . 55 



Authority. 



[Hist. Cel., one observa- 

 \ tion, 3d wire. 



M. Airy. Dec. Piazzi. 



J Mean of two observations, 

 \ each 3d wire. 



Piazzi VI. 252. 



. ,r, AC ,r \ Hist. Cel, imAdlXesnASA 

 + 40.48.46 I ^i^^^ 



+ 45 . 30 . 38 



+ 48.32.17 

 +54.38.45 

 + 64. 18 .12 



+ 61 . 12 . 48 



+ 13.34.42 

 + 10.26.38 



5 . 43 . 52 



I Groombridge, unpublish- 

 \ ed Catalogue. 



jHist. Cel., observed at 

 \ three wires. 



Piazzi. 



(Groombridge, unpublish- 

 1 ed Catalogue. 



Observed at three wires. 



{Observed at middle and 

 3d wires. 



Pond, Catalogue for 1830. 



(Observed at 1st and mid- 

 I die wires. 



