M81 Group
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| Galaxy groups and clusters |
List of galaxy groups and clusters |
|---|---|
| Observation data (Epoch J2000) |
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| Constellation(s): | Ursa Major/Camelopardalis |
| Right ascension | |
| Declination | |
| Number of galaxies: | ~30 |
| Brightest member: | M81 |
| Other designations | |
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The M81 Group is a group of galaxies in the constellation Ursa Major. It is one of the nearest groups to the Local Group. The group is estimated to have a total mass of (1.03 ± 0.17)×1012M☉.[1] The group itself is one of many located within the Virgo Supercluster (i.e. the Local Supercluster).[2]
[edit] Members
| Name | Type | Distance from sun (million ly) |
Magnitude |
|---|---|---|---|
| M81 | SAb | 11.8 | +6.93 |
| M82 | SBab (or IBm) | 11.5 | +8.4 |
| BK3N | 13.1 | ||
| BK5N | 12.3 | ||
| BK6N | 12.6 | ||
| DDO 33 | dGalaxy | +15.7? | |
| DDO 38 | dG. | +17? | |
| DDO 39 | dG. | +17? | |
| DDO 44 | dG. | 10.4 | +19 |
| DDO 51 | SBc | +14.9 | |
| DDO 53 | dG. | 11.6 | +15.4 |
| DDO 71 (KDG 63) | dG. | 11.4 | +18 |
| DDO 77 | SB | +14.8 | |
| DDO 78 | dG. | 12.1 | +15.8 |
| DDO 80 | SBm | +14.6 | |
| DDO 82 | dG. | 13.0 | +15.1 |
| DDO 86 | +15.4 | ||
| DDO 87 | dG. | +17 | |
| DDO 122 | dG. | +14.6 | |
| DDO 123 | IAm | +15.3 | |
| DDO 165 | dG. | 14.9 | +14.1 |
| F8D1 | 12.3 | ||
| FM1 | 11.2 | ||
| Holmberg I (AC0 936, DDO 63) | 12.5 | ||
| Holmberg II (AC0 814, DDO 50) | 11.1 | +17.1? | |
| Holmberg IX (DDO 66) | dIAm | ~12 | +16.5 |
| HS 117 | ~12 | ||
| IC 356 | SAbc pec. | +13.3 | |
| IC 560 | SA0 (or S0a) | +14.6 | |
| IC 2574 (DDO 81) | dG. | 13.1 | +11.2? |
| IKN | ~12 | ||
| KDG 52 (M81dwA) | 11.6 | ||
| KDG 61 | 11.7 | ||
| KDG 64 | 12.1 | ||
| KDG 73 | 12.1 | ||
| KK 77 | 11.4 | ||
| KKH 57 | 12.8 | ||
| NGC 2366 (DDO 42) | IAm | 10.4 | +11.6 |
| NGC 2403 | SAc | 10.8 | +8.4 |
| NGC 2976 | SAcp | 11.6 | +10.85 |
| NGC 3077 | IAm | 12.5 | +10 |
| NGC 4236 | SBdm | 14.5 | +10.1 |
| UGC 4483 | 10.5 | ||
| UGC 6456 | 14.2 |
Distances are taken from[3] unless otherwise noted.
[edit] External links
[edit] References
- ^ Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics 49 (1): 3-18.
- ^ R. B. Tully (1982). "The Local Supercluster". Astrophysical Journal 257: 389-422.
- ^ Karachentsev, Igor D. (2005). "The Local Group and Other Neighboring Galaxy Groups". The Astronomical Journal 129 (1): 178-188.
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