M21 NGC 6531
Constellation: Sagittarius
Distance: 4.25 kly
Type: Open Cluster
Imaging Location: Didsbury AB Canada
Imaging Platform: Equinox 80 QSI540
Mount: EQ6
Guiding Setup: SSAG Equinox 120
Exposure: 2x300 LRGB
Date: 2009-09-16
Software: MaximDL, Images Plus, PHD, Photoshop CS3