60 Royal Astronomical Society. 



ROYAL ASTRONOMICAL SOCIETY. 



[Continued from vol. xxix. p. 232.] 

 November 13, 1846. — Elements of Astrcsa. 

 Mr. Graham, of Mr. Cooper's Observatory at Markrec, has 

 deduced the following elements, omitting any consideration of dis- 

 turbing forces : — 



Old 



1846. Jan. 1. Mean Anoni 318 55 215 



77— o 353 55 49-2 "1 Mean Equinox, 



Q, 141 24 43-8/ 1846-0. 



I 5 19 22-1 



d> 10 45 57-7 



Log. « 0-4107004 



Log. 7j" 2-9339560 



n" 858"'9265 



Sid. Rev. 1509 days. 



The places from which these elements are deduced, are, — 



Greenwich M. T. R.A. Dec. 



1845. Dec. 17-460393 63 22 21-62 +12 40 18-29 



1846. Feb. 8053359 62 37 24-46 15 40 31-99 

 March 27-310391 77 59 41-13 +19 57 8-40 



The first place is a mean of ten continental observations ; the 

 second is a mean of four meridian observations by Mr. Cooper, at 

 Markree ; the third, a single observation at Pulkawa. 



Elliptical Elements of De Vico's Fourth Comet {Feb. 20, 1846), 

 by Mr. Hind. 



The following orbit is based upon the Altona and Hamburg 

 Observations of March 12, and Hamburg, March 31 and April 18. 

 There appears no doubt that the elements are really elliptical : — 



Perihelion Passage, 1846, March 5-57777, Greenwich Mean Time. 



O / II 



Longitude of Perihelion 90 34 4579 "l Mean Equinox, 



Longitude of Ascending Node 77 35 35-90/ 1846-0. 



Inclination 84 57 1261 



Angle of Eccentricity 72 37 42-99 



Log. semi-axis major 1-8062261 



Sidereal Revolution 55-4 years. 

 Motion direct. 



Note on the First Comet of Brorsen, by Mr. Hind. 



" The comet discovered by Mr. Brorsen at Kiel, on the 26th of 

 February last, has been found to have an elliptical orbit with a pe- 

 riod of b\ years only. Independent calculations by Dr. Briinnow, 

 M. Goujon, and myself, have led to nearly the same results as 

 regards the short time of revolution. This circumstance induced 

 me to examine the path of the comet through our system more mi- 

 nutely. Assuming the last set of elements calculated by Dr. 

 Briinnow, and published in No. 557 of the Astronomische Nach- 



