Centaurus A/M83 Group
| Centaurus A/M83 group | |
|---|---|
The Centaurus A galaxy is the largest and most massive galaxy in the group | |
| Observation data (Epoch ) | |
| Constellation(s) | Hydra, Centaurus, and Virgo |
| Right ascension | 13h 20m |
| Declination | −44° 58′ |
| Brightest member | Centaurus A |
| Number of galaxies | 44 |
| Other designations | |
| NGC 5128 Group, Centaurus A Group, LGG 344 | |
The Centaurus A/M83 Group is a complex group of galaxies in the constellations Hydra, Centaurus, and Virgo. The group may be roughly divided into two subgroups. The Cen A Subgroup, at a distance of 11.9 Mly (3.66 Mpc), is centered on Centaurus A, a nearby radio galaxy. The M83 Subgroup, at a distance of 14.9 Mly (4.56 Mpc), is centered on the Messier 83 (M83), a face-on spiral galaxy.
This group is sometimes identified as one group and sometimes identified as two groups. Hence, some references will refer to two objects named the Centaurus A Group and the M83 Group. However, the galaxies around Centaurus A and the galaxies around M83 are physically close to each other, and both subgroups appear not to be moving relative to each other.
The Centaurus A/M83 Group is part of the Virgo Supercluster, the local supercluster of which the Local Group is an outlying member.