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Jon Greif

Location of Photo:

Julian, CA, USA

Date/Time of photo:

April 23, 2020, at 11:00 pm PDT


Astrotech AT72EDII on SkyWatcher AZ-GTI Equatorial mount, Canon 760D Camera, Pixinsight software


Night before last, under beautiful skies in Julian (even saw a bright Lyriad meteor), this is the Whirlpool Galaxy, discovered on October 13, 1773, by Charles Messier and designated in his catalogue as M51. Its companion, and interacting galaxy, NGC 5195, was discovered in 1781 by Pierre Méchain. M51 is 30,000 light years across and lies 23.16 million light years from Earth. Its age is 400.3 million years and it contains an estimated 100 billion stars. Image is with a 72 mm refracting telescope and a Canon 760D DSLR camera, 31 stacked 30-second images at ISO 6400, processed in Pixinsight software.




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