R. Brent Tully's Nearby Galaxies Catalog lists a total of 8 members of this group; in addition to the two Messier galaxies and M51's companion NGC 5195, they are: NGCs 5023 and 5229 as well as UGCs 8313, 8331 and 8683.
This group is rather loose and clearly dominated by the two Messier galaxies.
The following table lists some data for the galaxies in the M51 group:
Name | RA(h:m) | Dec(d:m) | type | m_v | dim | RV |
---|---|---|---|---|---|---|
NGC 5023 | 13:12.2 | +44:02 | Sc: | 12.25p | 6.5x1.0 | 484 |
UGC 8313 | 13:13.8 | +42:12 | SBc | 14.63p | 1.9x0.6 | 699 |
UGC 8331 | 13:15.5 | +47:30 | Ir+ | 14.52p | 2.7x1.0 | 358 |
M63 | 13:15.8 | +42:02 | Sb+ | 8.57 | 12.3x7.6 | 575 |
M51 | 13:29.9 | +47:12 | Sc | 8.38 | 11.0x7.8 | 573 |
NGC 5195 | 13:30.0 | +47:16 | Pec | 9.63 | 5.4x4.3 | 658 |
NGC 5229 | 13:34.1 | +47:55 | SBd: | 13.90p | 3.3x0.7 | 476 |
UGC 8683 | 13:42.6 | +39:40 | Ir- | 14.28p | 2.0x1.9 | 748 |
Key: Name: Some catalog number or name; RA/Dec: Position 2000.0; type: Hubble type; m_v: apparent visual magnitude; dim: dimension in arc minutes; RV: radial velocity (all data from the Sky Catalog 2000 when available).
Last Modification: 18 Apr 1998, 21:00 MEST