M81

2005-12-09 UT 17:25:56
RCOS 16inch telescope (D=40cm, F/8.8) 
Apogee Alta U42 CCD camera 
NO FILTER
 
MaxIm DL 
Bias Dark Subtraction, Flat Field 
120-sec x 22 images combined (Median)
DDP Process

by

Hung-Chin Lin