Monday, November 19, 2018   
 
Astrophotography Gallery > Star Clusters > Globular Cluster M71
Date: Saturday, October 26, 2013
Location: Ahwahnee Hills Observatory
 
Globular Cluster M71, also catalogued as NGC 6838, is a globular cluster in the constellation Sagitta. It lies at a distance of approximately 12,000 light years from Earth. It was actually thought to be a densely packed open cluster, until photometry detected characteristics of a globular cluster and, thus, it was reclassified.
 
Mount: Celestron CGEM (Hypertuned)
Camera: Canon 60D (Stock)
Scope/Lens: Orion Astrograph 8" f/3.9 Newtonian
Guide Scope: Orion ST 80mm f/5 Refractor
Guide Camera: Orion Starshoot Autoguider
 
Exposure #1 (RGB):
   45 x 50 Seconds @ ISO 1600, f/3.9
   17 Darks, 40 Flats/Dark Flats/Bias

 
Integration: 0 Hours, 37 Minutes, 30 Seconds
 
Processing: BackyardEOS, PHD, DeepSkyStacker, Adobe Photoshop CS6
(Click Image to View Original Full Size)
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