Another Star

[Tom Droege <tdroege2@earthlink.net>]

Here is a star I found in DS20 Disk 9 and 10

I have plotted the star on the attached plot with I in red and V in 
green.  This star is labeled s571.
Since you can't read the x axis labels, the plot is 2hr 19m long and 
contains 53 measurements.

A nearby star is plotted for comparison with I in blue and V in cyan.  This 
star is labeled s579.

Star s571 is found at 4h 51m 10.2 s +7d 42m 55.6s.  We measure V = 10.39  I 
= 9.54 (mean values).
Simbad lists a K0 star BD+07 739 at 4h 51m 10.22s with B = 11.1 and V = 10.3

We found the comparison star at: 4h 51m 18.5s +7d 46m 30.4s  with V = 10.27 
and I = 9.06
Simbab lists a star GSC 00684-00553 at 4h 51m 18.53s +7d 46m 31.1s with B = 
11.4 and V = 10.3

OK, this looks like a variable star to me.  I think there are lots more 
where this one came from.  It is just a question of getting everything 
calibrated.

Tom Droege

star_571.png