Messier 101
The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on, counterclockwise Intermediate spiral galaxy located 21 million light-years (6.4 megaparsecs) from Earth in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 and was communicated that year to Charles Messier, who verified its position for inclusion in the Messier Catalogue as one of its final entries (by Wikipedia).
Total exposure time was 2 hours through my new Baader UV IR cut filter.
More technical info on my Astrobin profile: M 101 – AstroBin
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Last Update: May 4, 2025
