Object: M13 Globular Cluster
Date: April 10, 2002
Equipment: 10" SCT at F/6.3, HX916 CCD, G11 mount, ST-4 autoguider
Exposure: LRGB: L=10x1min + 5x2 min + 1x10min,   RGB = 6:4:5 minutes
Processing: Photoshop, curves and mild unsharp mask, no dark or flat frames applied
Comments: Good seeing (1.9" at one point), but very  humid with some dew on the corrector
Description: A spectacular globular cluster in the constellation of Hercules. M13 is 25,000 light years away, and spans 200 light years (16'). It contains over 100,000 stars. At the center of the cluster, stars are as close as 2 light years away from each other. The night sky on a planet around one of these stars must be extremely bright from all the nearby stellar neighbors.

Copyright 2002 Paul Kanevsky