402 
Account of the Large Comet of 1819. 
The following Table^ calculated by Mr Ilumker, contains a 
comparison of Mr Pond’s observations, with the results calcu- 
lated from the preceding elements. 
1819. 
July 18. 
^ 22 . 
23. 
24. 
25. 
26. 
Mean time at 
Greenwich. 
11 ^ 34 ^ 
11 51 49 
11 49 58.5 
11 48 5 
11 46 9 
11 44 9 
Observed Lon- 
gitude of Co- 
met. 
Calculated Lon- 
gitude of Co- 
met. 
Difference be- 
tween Obsefv. 
and Calculat. 
3 17 54 41 
3 17 55 33 
3 19 29 23 
3 19 29 31 
+ 8 
3 19 51 38 
3 19 51 49 
+ 11 
3 20 13 26 
3 20 13 34 
+ 8 
3 20 34 47 
3 20 34 50 
+ 3 
3 20 55 39 
3 20 55 34 
+ 5 
1819. 
Mean time at 
Greenwich. 
Observed Latitude 
of Comet, 
Calculated Lati- 
tude of Comet. 
Diff’erence be- 
tween Observ. 
and Calculat. 
July 18. 
llh 34' 
29^^ 56' lO'/N. 
29" 56' 20^'^N. 
+ 10^^ 
0)0 
11 51 49 
30 19 35 
30 19 2 
— 33 
23. 
11 49 58.5 
30 22 44 
SO 20 45 
1'59 
24. 
11 48 5 
30 25 42 
30 18 55 
— 6 47 
25. 
11 46 9 
30 28 14 
30 19 6 
— 9 8 
26. 
11 44 9 
30 30 4 
30 20 0 . 
— 10 4 
The increasing error in latitude, seems to indicate an ellipti- 
cal orbit. 
M. Santini, Director of the Observatory at Padua, computed 
the following elements, from observations made under unfavour- 
able circumstances. 
Passage of the perihelion, 1819, June 26. 79835. 
Longitude of the node, - - 9® S'* 23' 2^'' 
Longitude of the perihelion, - 9 11 1 4 
Inclination of the orbit, - - 81 37 15 
Logarithm of the perihelion distance, - 9.489446 
Perihelion distance, - _ - 0.30863 
Logarithm diurnal motion, - - 0.725959 direct. 
M. Nicolai, Director of the Observatory at Manheim, obtain- 
ed the following elements : 
Passage of th^ perihelion, 1819? June 28. 13889? mean time at 
Manheim. 
Longitude of the node, - - 9® 3^ 45' 0''"' 
