Designations | Ursa Major Cluster, Ursa Major I Cluster, UMa I ClG | Divisions | Subdivided into a North Group (also called the M109 Group) and a South Group | Constellation | Ursa Major | Right Ascension | Centred around 11h 53m 49s | Declination | Centred around +52° 19' 36" | Distance | c.60,700,000 light years c.18,600,000 parsecs | Dimensions | Apparent: c. 16° x 5° Actual: c. 16,800,000 x 5,700,000 light years | Members | About sixty major galaxies, including M109, NGC 3556, NGC 3675, NGC 3718, NGC 3953, NGC 4157 | Optimum Visibility | March / April (Usually visible from northern latitudes) | Notes | A component cluster of the Virgo Supercluster, with a high population of spiral and barred spiral galaxies. Not to be confused with the Ursa Major Moving Cluster (or Moving Group), a collection of stars within the Milky Way Galaxy in the same general part of the sky. |
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