AT THE OBSERVATORY AT PARAMATTA. 67 



Parabolical Elements. 

 Passage over the Perihelion . . 1826, Oct. 9''.205.53, Mean Time Paramatta. 



T -^ i c A/f T? • T 1 iQo^ r Perihelion 57° 30' 15" 



LongitudefromMeanEqmn.Jan.l, 1827,|A^^g^jj^gj^^^^ 4^ jO 34 



Logarithm of Perihelion Distance . 9.9316004 



Inclination 25° 46' 0" 



Motion direct. 



G. Re-appearance of the Comet of Encke in 1828. 



Comparisons with principal stars, that but rarely chanced to be sufficiently 

 near its track to avoid inaccuracies arising from the position of the wires or 

 inequalities of the micrometer screws, would have been of little service for a 

 comet, whereof the positions were already better known from the Ephemeris 

 of Professor Encke. I have therefore confined my observations to stars, how- 

 ever small, to which it nearest approached, as their places may be determined 

 at any time hereafter, being sufficiently known from the place of the comet 

 itself to identify the stars in the meridian. 



Original Observations of the Comet of Encke, made at Paramatta. 



1828. 

 Nov. 2. — At 1" 11™ 42« Sidereal Time, the Comet followed 56 Pegasi in 55' in Time, and was 6' 

 North thereof in arc. 



Nov. 3.— At 23'" 34" 41" Sidereal Time, the Comet preceded 56 Pegasi 3" 18% being South of that 

 Star. The Comet covered at the same time a Star (a) of the 10th magnitude, which was about 3' 

 North of two Stars (b and c) of the 9th magnitude situated contiguous to one another. 



Nov. 5. — At SS"* l" 40' Sidereal Time, the Comet preceded a Star (d) 43', whereof it was 4' North. 

 The Star is contained in the Hktoire Celeste, its place being about in Xi 22'' 46"" 24', Declin. 

 23° 29'. 



Nov. 7. — At 23'' ig"" 6" Sidereal Time, the Comet preceded \ Pegasi 2"" 5'.5, and was 0' 23'' North 

 thereof. At O*" 47"" Sidereal Time, the Comet preceded the same Star 2" 19', and was 3' 23" 

 North thereof. The latter observations are somewhat uncertain. 



Nov. 10. — At 0" H" 33" Sidereal Time, the Comet was in the same Hour-circle, and 15" direct 

 North of a Star (e) of the 9th magnitude. This Star had the same M with, and was 3' 30" North 

 of, the second of two contiguous Stars (f and g) of the 1 0th magnitude, whereof the difference of Ji 

 is 12' in Time. 



K 2 



