Messier 101

89. Messier 101


Messier 101  RA: 14h 03.2'  Dec: +54 21'   Ursa Major (UMa)

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The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy 21 million light-years (6.4 megaparsecs) away 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.

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. The image was composed of 51 individual exposures, plus some extra ground-based photos.

On August 24, 2011, a Type Ia supernova, SN 2011fe, was discovered in M101.
 

Image Information

Location Fingal ON
Date Apr 09 2008
Optics Celestron C8
Filters Celestron f/6.3 reducer
Mount Celestron CGE
Camera Canon Rebel XT
ISO 400
Subexposures 12
Exposure Length 300
Guider SBIG ST-4/Stellarvue NH2
 

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All images copyright © 2006-2021, Rick Saunders
Main text descriptions sourced from Wikipaedia.
Sky position information is based on IP geolocation and is therefore approximate.