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DesignationsUrsa Major Cluster, Ursa Major I Cluster, UMa I ClG
DivisionsSubdivided into a North Group (also called the M109 Group) and a South Group
ConstellationUrsa Major
Right AscensionCentred around 11h 53m 49s
DeclinationCentred around +52° 19' 36"
Distancec.60,700,000 light years
c.18,600,000 parsecs
DimensionsApparent: c. 16° x 5°
Actual: c. 16,800,000 x 5,700,000 light years
MembersAbout sixty major galaxies, including M109, NGC 3556, NGC 3675, NGC 3718, NGC 3953, NGC 4157
Optimum VisibilityMarch / April (Usually visible from northern latitudes)
NotesA 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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