Messier 13, the Great Globular Cluster in Hercules

Dr Alan Potts
Location of photo
Lincoln, England
Date/Time of photo
30th July, 2016
7-inch Maksutov-Newtonian telescope on Sky-Watcher EQ6 mount, Nikon D3300 at 1600 ISO sensitivity
M13 in Hercules is approximately 22000 light years distant and contains of the order of 300000 stars. This is a 10m 20s total exposure consisting of a stack of 10s subframes. Using short exposures ensures no saturation in various subjects.
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