Messier 101 and Arp 26 (North Up, East Left)
Messier 101, also known as NGC 5457, Arp 26 and the “Pinwheel Galaxy”, is a galaxy with classification SAB(rs)cd in the constellation of Ursa Major.  It has a diameter of ~200,000 light- years.  The galaxy is designated both Messier 101 and Messier 102, though the galaxy NGC5866 in Draco is often designated as Messier 102. In the second image, the galaxy to the north-northwest is NGC 5422, the galaxy to the north- northeast is NGC 5485 and the galaxy to the south-southeast is NGC 5474 (Herschel 122).  The images comprise 6 x Luminance (300 seconds each), 0.101m f/5.4 Tele Vue refractor with FLI ML16200 camera at an altitude of 60 degrees on 27 February 2017.  The fields of view of the top and bottom images are 132’ x 132’ (2.2 degrees square) and 42’ x 42’, respectively.
Hills Observatory: 1 January 2013 to 14 August 2018