Mr . Pigott's Otfervatrom on- 
Zl2 
Tycho’s 22d Andromedae and o. Andromeda. 
Gassini remarked, that the ftar placed by Tycho at thee 
end of the chain of Andromeda &s of the 4th magnitude, was- 
grown fo fmall that it could fcarcely be feen. This is Tycho’s 
N° 22, the longitude and latitude of which places it near the 
two 7 r Cygni, and where no ftar was vifible in 1 784 and 1785. 
As poflibly, by Tycho’s defcription, Cassini took the 2 2d 
for the 0 Andromeda, I have alfo examined this ftar, and in 
1783, 1784, and 1785, found its relative brightnefs thus : 
lefs than u Cephei ; equal to r Q Caffiopese, though, if any dift 
ference, rather brighter ; and brighter than cr / Andromeda?, , 
Tycho’s 19th Aquarih 
This is the ftar that Hevelius fays- was miffing, and that 
Flamsteed could not fee with his naked eye Nov. i8> 1679 
nor could I fee the leaft appearance of it in 1782. I . am con- 
vinced it is the fame ftar as Flamsteed’s 56th, marked fby 
Bayer, from which it is only j°|. Flamsteed’s 53d,, „ 
marked f in Ptolemy’s Catalogue, is a different ftar. „ 
La Caille’s 483 Aquarii; 
1 firft difcovered that this ftar was miffing in 1 778^ It: was--, 
not vifible in 1 783, 1784. 
There are a few other ftars fufpe£ted by: the ancient aftro» 
nomers to have been new or altered a little in brightnefs, 
which I have omitted, not feeing any reafon to think them fo ; 
and fonqe that are certainly variable, but cannot be obferved in 
I- thefe 
