| M109 Group | |
|---|---|
| Observation data (Epoch J2000) | |
| Constellation(s) | Ursa Major |
| Right ascension | 11h 55m [1][2] |
| Declination | +51° 20′[1][2] |
| Brightest member | Messier 109[1][2] |
| Number of galaxies | 41–58[1][2][3] |
| Other designations | |
| NGC 3992 Group, LGG 258,[1] NOGG H 547,[2] NOGG P1 588,[2] NOGG P2 597[2] | |
The M109 Group (also known as the NGC 3992 Group or Ursa Major cloud) is a group of galaxies about 55 million light-years away[4] in the constellation Ursa Major. The group is named after the brightest galaxy within the group, the spiral galaxy M109.
- ^ a b c d e 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 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.
- ^ Cite error: The named reference
nbgwas invoked but never defined (see the help page). - ^ The Ursa Major Groups