Captain Hall's comet seen at Valparaiso. 
63 
# 
The new elements (C) are 
Perihelion distance ,091677 
Time of passage through l March2l> ”, ^ 
perihelion - - - J e , „ 
Inclination - - - - 73 34 53 
Node - - - - 48 42 18 
Place of perihelion - - 239 30 33 
Motion retrograde. 
Errors of the Elements (C). 
Mean time 
Greenwich. 
Error in 
Longitude. 
Error in 
Latitude. 
Observers. 
Jan. 
21 
/ // 
+ Ol8 
1 // 
— O 12 
M. Nicollet, Paris. 
3° 
+ 1 6 
+ 013 
Dr. Olbers, Bremen. 
Feb. 
9 
— 0 28 
— 0 44 
M. Nicollet. 
Mar. 
6 
— 2 17 
— 0 57 
Dr. Olbers. 
April 
8 
+ 018 
— 0 45 
Captain Hall, Valparaiso. 
20 
+ on 
— 0 10 
Ditto. 
May 
3 
— 0 49 
+ 012 
Ditto. 
Between January 21, and May 3, the comet described 
above 300° about the sun : consequently, as a parabola re- 
presents the observations with so much exactness, it follows, 
that the period of its revolution must be considerable. 
J. B. 
Observatory, Trinity College, Dublin, 
Feb. 25, 1822. 
