M13 - The Great Globular Cluster in Hercules
May 20-26, 2010.
LB-0003.
L = 20 min, R = 14 min, G = 12 min, B = 14 min
Two-minute guided exposures.
Nine additional frames rejected due to tracking errors.
Artificial flat, Log, Unsharp Mask, background smooth, hot pixels removed.