| M101 Group | |
|---|---|
 The Pinwheel Galaxy, the brightest galaxy in the M101 Group | |
| Observation data (Epoch J2000) | |
| Constellation(s) | Ursa Major |
| Right ascension | 14h 04m[1][2] |
| Declination | +54° 31′[1][2] |
| Brightest member | Pinwheel Galaxy[1][2][3] |
| Number of galaxies | 7-9[1][2][4][3] |
| Other designations | |
| NGC 5457 Group, LGG 371,[1] NOGG H 758,[2] NOGG P1 766,[2] NOGG P2 781[2] | |
The M101 Group is a loose group of galaxies located in the constellation Ursa Major. The group is named after the brightest galaxy in the group, the Pinwheel Galaxy (M101). Most of the other members of the group are companions of the Pinwheel Galaxy.[1][2][4][3] The group itself is one of many located within the Virgo Supercluster (i.e. the Local Supercluster).[5]
- ^ a b c d e f A. Garcia (1993). "General study of group membership. II - Determination of nearby groups". Astronomy and Astrophysics Supplement. 100: 47–90. Bibcode:1993A&AS..100...47G.
- ^ a b c d e f g h G. Giuricin; C. Marinoni; L. Ceriani; A. Pisani (2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups". Astrophysical Journal. 543 (1): 178–194. arXiv:astro-ph/0001140. Bibcode:2000ApJ...543..178G. doi:10.1086/317070. S2CID 9618325.
- ^ a b c P. Fouque; E. Gourgoulhon; P. Chamaraux; G. Paturel (1992). "Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members". Astronomy and Astrophysics Supplement. 93: 211–233. Bibcode:1992A&AS...93..211F.
- ^ a b R. B. Tully (1988). Nearby Galaxies Catalog. Cambridge: Cambridge University Press. ISBN 0-521-35299-1.
- ^ R. B. Tully (1982). "The Local Supercluster". Astrophysical Journal. 257: 389–422. Bibcode:1982ApJ...257..389T. doi:10.1086/159999.