Pinwheel Galaxy (M101)


(Updated Dec. 2017)

Also known as M101, the Pinwheel Galaxy is in Ursa Major (the Big Dipper) and about 21 million light years from Earth. It is a spiral galaxy, like the Milky Way, but is unusually asymmetric.  The smaller galaxy on the left side is NGC5474, and there is an even smaller one above M101, NGC5477.

Scope: AT111EDT at f/5.7
Mount: AP Mach1GTO
Camera: QSI 683 at –20C


About Greg Marshall

I am a retired electronics engineer and after a few months of enjoying my leisure I began to miss doing product development. My astronomy hobby always needed new solutions to unique problems, so I decided that whenever I came up with a good solution I would try to make it available to others.

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