414 



Mr. J. R. Hind on the Comets 



nevertheless a parabola satisfies the observations very well. 

 The following are the later determinations of the orbit ;jtr8Bw 



Nicolai. 



T Jan. 8-19615. 



Mean time at Berlin. 



v 9°1 19 57-2 



ft ... 336 44 30-5 



i 46 50 30-5 



Log. q 9-9567518. 

 Motion direct. 



■!-,j.i 



Gotze. 



Jan. 8-193091. 



Mean time at Berlin, 



9°1 19 39-07 



336 44 30-33 



46 50 3008 



9-9567392. 



Hind. 



Jan. 8-165484 



Mean time at Greenwich. 



9°1 20 22-1 

 336 44 12-9 

 46 50 39-0, 



■J.;,' 



NnnyVc. ,m 



fjilj^iid 



o{ u 



nnHj 



|Bfno3 B 



to'i 6>IiI 



All the longitudes are referred to the mean equinox^bf 

 1845-0. ' '^ 



The comet was observed generally until the middle of 

 March, but it was seen at Berlin with the great refractor until 

 the 30th of the same month. Its appearance was that of a 

 large bright nebula, not quite circular, with a bright nucleus' 

 situated eccentrically, though very slightly so. '.'- 



■ A'i> .M 

 Second Comet of Tie Vico. /<! hnu 



On the night of February 25, 1845, another comet was 

 found at Rome by De Vico, in the constellation Ursa Major. 

 When first observed in this country, it was brighter than the 

 last comet, of a circular form, with a very fine lucid spot or 

 condensation of the nebulous matter in the centre. We saw 

 it at this Observatory until April 1 7 ; at Cambridge it was ob- 

 served several days longer. The elements have been deduced 

 by many computers, but I shall only transcribe those which 

 depend on the widest extent of observation. M. Faye's ex- 

 cellent orbit was communicated to me by letter, the others are 

 extracted from Professor Schumacher's Astronomische Nach- 

 richten. 



The longitudes are counted from mean equinox 1845*0,^ „,,j, 



■ > i9«IO0 



The Great Comet of June 1845. Colla's Comet. 



ilOf) 



On the 2nd of June M. Colla detected a fine comet in th0r 



