312 Calculations of some observations of the 
From the three following observations of Doctor Olbers, I 
calculated the elements of the comet in the Pegasus 1821, 
Mean Time at 
Bremen. 
Comets appar. 
AR. 
Ditto, declina- 
tion, North. 
January 30 
February 19 
March 6 
7° 17' 51" 
6 49 20 
6 56 20 
359 27 4 
357 59 48 
356 46 33 
16 5 1 
14 48 10 
13 34 21 
Thence I find 
Transit over the perihelion, March, 21,6114625 mean time at Bremen. 
Long, of the perihelion 239° 35' 53" upon the orbit. 
Long, of the d. Node 48 44 18 
Inclination of the orbit 73 20 00 
Log. perihelion distance 8,9651463. 
Motion retrograde. 
These calculations are founded upon Burckhardt’s lunar 
and Carlini’s solar tables. 
From the former, the moon's place for mean noon at 
Paris, on the 7th of September 1820, was found. 
Moon's apparent longitude 
S - o / 
- 5 13 49 24,13 
Latitud 
49 5946 
Equation, horizontal parallax 
53 53 
Moon's semidiameter 
14 41 
Carlini's solar table give © 
latitude -{- 0,44 
Horizontal parallax 
3,76 
Semidiameter 
15 54,8 
Ratio of the axes of the earth 302,8 : 303,8. 
The above calculations resolved after the method of the 
least squares (Methode des moindres carr£s) give for the 
error of Burckhardt’s lunar table 
d. Lat. —-3,975; d{ R — r) — — 3,768 t/(R+r ) = — 3,497. 
