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M81 Group

Galaxy group in Ursa Major and Camelopardalis / From Wikipedia, the free encyclopedia

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The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses.[1] The approximate center of the group is located at a distance of 3.6 Mpc, making it one of the nearest groups to the Local Group.[1] The group is estimated to have a total mass of (1.03 ± 0.17)×1012M.[2] The M81 Group, the Local Group, and other nearby groups all lie within the Virgo Supercluster (i.e. the Local Supercluster).[3]

Quick facts: M81 Group, Observation data (Epoch J2000), Co...
M81 Group
Observation data (Epoch J2000)
Constellation(s)Ursa Major/Camelopardalis
Brightest memberM81[1] (pictured)
Number of galaxies34[1]
Other designations
NGC 3031 Group
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters