134? Mr. Pigott on the periodical Changes of 
south : this, for the present, suffices to point out its place ; for 
as I wish to proceed immediately to the results, I shall, for 
greater perspicuity, collect at the end of this account, a more 
exact determination of its right ascension and declination, as 
also a plan of the stars situated near it. 
When at its full and least brightness, it attains in different 
periods, different degrees of brightness : I have never yet seen it 
of a greater magnitude than of the 5th, nor when at its least, less 
than the 7.8th. It completes all its changes in about 63 days, 
being 1 4 z±= at its full brightness, without any perceptible change : 
9=±= at its least, also without any perceptible change ; 28=±= days 
decreasing from the middle of its full brightness to the middle 
of its least ; and 35 =t= increasing from the middle of its least 
brightness to the middle of its full. These results being de- 
duced from only the few observations I have made, cannot, of 
course, be very accurate, but may easily and soon be corrected 
by comparing any future observation with those communicated 
in this paper ; not relying much on the estimated magnitudes, 
but principally on its comparative brightness with the stars 
there mentioned and marked in the plan, the magnitudes of 
which, by a mean of several observations, I have settled thus : 
Magnitudes. 
* 3 
* 4 
m 4 
I 4.5 
0 4.5 
* 5 
* 5 
b 5.6 
g S 6 
* above l 6 
P 6.7 
neb. 6.7 
r 7 
T 8 
The nine first letters are according to Flamsted, the others as 
affixed by me. 
