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Open Cluster M52 Photographed by Scott Davis on August 3, 2013 From Courtright Reservoir, CA   Description: Open Cluster M52, also catalogued as NGC7654, is a dense open cluster located in the constellation Cassiopeia. It is thought to contain approximately 190 member stars. Due to the absorption of light by interstellar gas, its exact distance is not known. Also visible in this photo (at lower left) is the upper portion of the Bubble Nebula (NGC6822).   Imaging Camera: Canon EOS 60D   Imaging Scope/Lens: Orion Astrograph 8" f/3.9 Newtonian   Mount/Tripod: Celestron CGEM (Hypertuned)   Guide Scope/Camera: Orion Astrograph 8" f/3.9 Newtonian   Exposure Details: Camera settings were ISO 1600 with 60-second exposures. A total of 35 light frames, 15 dark frames, and 40 each of flat, dark flat, and bias frames were combined to create this image. Total integration time 35 minutes.

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