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Catalogue and alternative designations

M101, NGC 5457, Pinwheel galaxy

Type Galaxy
Position 14 03 12.6, +54 20 57
Constellation Ursa Major
Camera and Telescope QSI 583 WSG, 20cm Maksutov Newtonian courtesy Dean Salman
Focal Ratio F4
Exposure Details LRGB 130:180:180:130 with Astrodon series 2 filters
Description This a large (28.8' x 26.9') and bright galaxy  (magnitude 7.86) that would rank as one of the northern hemisphere's signature objects.  It is about 70% larger than the milky way and quite close at about 21 million light years.  There is much interesting detail, some of it visible with quite small telescopes.