2 
LIEUTENANT W. ROBERTSON’S OBSERVATIONS OF THE 
Transactions, induces me to address this communication to you, to be laid 
before the Society, if you consider it worthy of that honour. 
M. Pons, it appears, (Zach, vol. vi. p. 385) first discovered this comet on 
the 31st of May, about two o’clock in the morning-. It was then at the distance 
of 2|° from the star (3 Piscium, 5° from n Aquarii, nearly in 340|° of At, and 
in 2^° north declination. As M. Pons had no instruments ready to observe 
the comet, it does not appear to have been further noticed till the 8th of June, 
by Professor Caturegli at Bologna, and two days afterwards by M. Gambart 
at Marseilles. Owing to its extreme feebleness, however, Baron Zach does 
not appear to think the observations at Bologna very exact. 
The following two Tables of the observations just mentioned are from Zach’s 
Correspondence, vol. vi. p. 482. 
1822. 
Terns vrai 
a Bologne. 
Ascen. droite de 
la comete. 
Declin. de la 
comete australe. 
h 
m 
/ 
o 
/ 
Juin 8 
15 
10 
347 
39 
8 
49 
10 
14 
45 
351 
43 
13 
28 
11 
14 
44 
354 
32 
16 
46 
12 
14 
59 
358 
25 
21 
5 
The following are the only two observations made by M. Gambart at 
Marseilles. 
1822. 
Terns moyen 
de minuit. 
Differ, d’ascen. 
droite. 
N° 
d’obs. 
Differ, de 
declin. 
N° 
d’obs. 
Etoiles companees. 
| Juin 10 
h m s 
3 3 49 
+ 2 11 9.2 
1 
— 21 38.1 
1 
\f/ J du Verseau. 
11 
2 48 56 
— 0 20 27-0 
4 
+ 30 31.3 
4 
133 Hor. xxih.Piazzi. 
From these few observations, M. Hdlingenstein has deduced the orbit in 
Schumacher’s Astronomische Nachrichten, vol. iv. pp. 533, 534, and which 
I have copied at the end of this letter. But as the above observations com- 
prehend only a very small portion of the orbit, these elements are susceptible 
of improvement from observations made during a longer interval. 
The following are the whole of the observations which were made by 
Mr. Drinkwater and myself on this comet. 
