M96 Group

"Leo Group" redirects here. For the company, see The Leo Group. For the cluster of galaxies, see Leo Cluster. For the galaxy triplet, see Leo Triplet.

The M96 Group (also known as the Leo I Group) is a group of galaxies in the constellation Leo. This group contains between 8 and 24 galaxies, including three Messier objects.^[3][4][5][6] It also contains the Leo Ring. The group is one of many groups that lies within the Virgo Supercluster (the combined Local Group and Virgo Cluster).^[7]

M96 Group
M95 (left) and M96 (right). Credit:Scott Anttila.
Observation data (Epoch J2000[1][2])
Constellation(s)	Leo[3][4]
Right ascension	10h 48m 34.7s [1]
Declination	+12° 40′ 15″ [1]
Brightest member	M96[3][4]
Number of galaxies	8-24[3][4][5][6]
Distance	11.3 Mpc (37 Mly) [1]
Other designations
Leo I Group,[6] LGG 217,[3] NOGG H 507,[4] NOGG P1 498,[4] NOGG P2 507[4]

Members

The table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog,^[5] the survey of Fouque et al.,^[6] the Lyons Groups of Galaxies (LGG) Catalog,^[3] and the three group lists created from the Nearby Optical Galaxy sample of Giuricin et al.^[4]

Members of the M96 Group

Name	Type[8][9]	R.A. (J2000)[8][9]	Dec. (J2000)[8][9]	Redshift (km/s)[8][9]	Apparent Magnitude[8][9]
M95	SB(r)b	10h 43m 57.7s	+11° 42′ 14″	778 ± 4	11.4
M96	SAB(rs)ab	10h 46m 45.7s	+11° 49′ 12″	897 ± 4	10.1
M105	E1	10h 47m 49.6s	+12° 34′ 54″	911 ± 2	10.2
NGC 3299	SAB(s)dm	10h 36m 23.8s	+12° 42′ 27″	641 ± 6	13.3
NGC 3377	E5.5	10h 47m 42.4s	+13° 59′ 08″	665 ± 2	11.2
NGC 3384	E7	10h 48m 16.9s	+12° 37′ 46″	704 ± 2	10.9
NGC 3412	SB(s)0	10h 50m 53.3s	+13° 24′ 44″	841 ± 2	11.5
NGC 3489	SAB(rs)0	11h 00m 18.6s	+13° 54′ 04″	677 ± 2	11.1
Leo Ring	H I region	10h 48m 19.0s	+12° 41′ 21″	960 ± 80

Nearby groups

The Leo Triplet, which includes the spiral galaxies M65, M66, and NGC 3628,^[3][4][5] is located physically near the M96 Group.^[10] Some group identification algorithms actually identify the Leo Triplet at part of the M96 Group.^[4][6] The two groups may actually be separate parts of a much larger group.^[10]

M96 Group also includes the bright galaxies Messier 105 and Messier 95.^[11]

See also

• Leo II Groups
• Virgo II Groups
• Virgo III Groups