Messier 101

28. 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 distanced 21 million light-years (six megaparsecs) away from Earth in the constellation Ursa Major. It was 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. 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 Jun 26 2011
Optics AstroTech AT8IN
Filters Baader MPCC
Mount Celestron CGE
Camera Canon/Hutech 500DH
ISO 1600
Subexposures 10
Exposure Length 300
Guider SBIG ST-4/WO 66SD
 

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All images copyright © 2006-2020, Rick Saunders
Main text descriptions sourced from Wikipaedia.
Sky position information is based on IP geolocation and is therefore approximate.