Messier 40
Photographed by Scott Davis on May 11, 2013
From Clovis, California
Also catalogued as Winnecke 4, Messier 40 is one of the oddities in Messier's catalogue of deep-sky objects. Charles Messier discovered this double star in the constellation Ursa Major while searching for a nebula reported in the area by Johann Hevelius. He never found the nebula, and catalogued the double star instead. Astronomers today are puzzled as to why Messier included this in his catalogue, considering it was clearly not a comet nor a nebula or galaxy that could be mistaken for one.
Imaging Camera:
Canon EOS 60D
Imaging Scope/Lens:
Orion Astrograph 8
Celestron CGEM (Hypertuned)
Guide Scope/Camera:
Exposure Details:
Camera settings were ISO 1250 with 10-second exposures. A total of 60 light frames and 30 dark frames were combined to produce this final image. Captured using BackyardEOS, stacked using Deep Sky Stacker, and processed in Adobe Photoshop CS6 using Scott Rosen's DSLR LLRGB method.

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