Open Cluster M46
Photographed by Scott Davis on February 10, 2013
From Ahwahnee Hills Observatory
Messier 46, also known as NGC2437, is a large open cluster in the constellation Puppis. It lies approximately 5,500 light years from Earth. A planetary nebula, NGC2438, also appears in this image. Astronomers do not believe that the nebula lies within M46; rather, it is just superimposed on it.
Canon EOS 60D
Orion Astrograph 8" f/3.9 Newtonian
Orion Shorttube 80mm w/ Starshoot Autoguider
Camera settings were ISO 1600 with 50-second exposures. This image is a composite of 40 light frames and 15 dark frames.
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