M101 Pinwheel Galaxy


The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years (six megaparsecs)[3] away from Earth in the constellation Ursa Major. Discovered by Pierre Méchain on March 27, 1781, it was communicated to Charles Messier who verified its position for inclusion in the Messier Catalogue as one of its final entries.

On February 28, 2006, NASA and the European Space Agency released a very detailed image of the Pinwheel Galaxy, which was the largest and most detailed image of a galaxy by Hubble Space Telescope at the time.[8] The image was composed of 51 individual exposures, plus some extra ground-based photos.

Technical Data

Bortle Scale / SQM-L Bortle 4/5  / ---
Period March 2019
Primary Scope  CCA 250/1250
Camera CCD  KAF-8300
Mount AP 1100 GTO CP4
Total Exposure Time 7h
Composition LRGB
Location Val Imagna (Bergamo) Italy


  Wide Field with FSQ106 - KAF8300 - NEQ6

 © Efrem Frigeni Astrophoto

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