M22 - Globular Cluster in Sagittarius
From the author of Sizing Up The Universe
Click here for Hertzsprung-Russell diagram.
22:16 EDT Jul 10, 2008.
Starlight Express SXV-H9 on Tak FSQ106 at f/5.
R=28 min, G=24 min, B=25 min
(in unguided 1-minute subexposures).
Log stretch, Gamma stretch.