Globular Cluster M28
Photographed by Scott Davis on August 10, 2013
From Ahwahnee Hills Observatory
Globular Cluster M28, also catalogued as NGC6626, is a globular cluster in Sagittarius. It lies at a distance of approximately 17,900 light years from Earth.
Imaging Camera:
Canon EOS 60D
Imaging Scope/Lens:
Orion Astrograph 8" f/3.9 Newtonian
Celestron CGEM (Hypertuned)
Guide Scope/Camera:
Orion Shorttube 80mm w/ Starshoot Autoguider
Exposure Details:
Camera settings were ISO 800 with 45-second exposures. A total of 27 light frames, 15 dark frames, and 40 each of flat, dark flat, and bias frames were combined to create this final image. Total integration time is 20 minutes and 15 seconds.

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