NGC 7640


A galaxy in Andromeda. 10 x 1.5 arc-min.  Magnitude 10.9.

The shot above is an LRGB composite from seventeen 5 minute luminance frames, three 5 minute frames each for the RGB's, for a total of  1 hour and 50 minutes.  The result was color balanced to 1.15 : 1.00 : 2.05 which takes extinction into account.  The luminance frames were unbinned, and the color frames were binned 2x2.  12" LX200, AO7, ST-8E @ f/6.3.  Taken August 16, 2001 at the Oregon Star Party.