Ursa Major Cluster
The Ursa Major Cluster is a spiral-rich galaxy cluster of the Virgo Supercluster.
Some of its largest members are NGC 3631, NGC 3953, M109 on North and NGC 3726, NGC 3938, NGC 4051 on South.
The Ursa Major cluster is located at a distance of 18.6 megaparsecs and contains about 30% of the light emitted but only 5% of the mass of the nearby Virgo Cluster.
