Thor's Helmet (NGC 2359)

Posted by ajgaudy
on Wednesday, December 17, 2008

by Al Kelly

 

14-inch Celestron CGE1400 Schmidt-Cassegrain telescope at f/5.4, Starlight Xpress MX916 CCD camera, eleven 600-second clear-filtered subexposures, four 480-second subexposures in red, three 480-second subexposures in green, and five 480-second subexposures in blue.

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