M96 Group

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Not to be confused with Leo Cluster or Leo Triplet.
M96 Group
M95 (left) and M96 (right). Credit:Scott Anttila.
Observation data (Epoch J2000)
Constellation(s) Leo
Right ascension [1][2]
Declination [1][2]
Brightest member M96[1][2]
Number of galaxies 8-24[1][2][3][4]
Other designations
Leo I Group,[4] LGG 217,[1] NOGG H 507,[2]
NOGG P1 498,[2] NOGG P2 507[2]
See also: Galaxy groups, Galaxy clusters, List of galaxy clusters

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.[1][2][3][4] The group is one of many groups that lies within the Virgo Supercluster (i.e. the Local Supercluster).[5]


The table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog,[3] the survey of Fouque et al.,[4] the Lyons Groups of Galaxies (LGG) Catalog,[1] and the three group lists created from the Nearby Optical Galaxy sample of Giuricin et al.[2]

Members of the M96 Group
Name Type[6] R.A. (J2000)[6] Dec. (J2000)[6] Redshift (km/s)[6] Apparent Magnitude[6]
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 SB(s)0 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

Nearby groups[edit]

The Leo Triplet, which includes the spiral galaxies M65, M66, and NGC 3628,[1][2][3] is located physically near the M96 Group.[7] Some group identification algorithms actually identify the Leo Triplet at part of the M96 Group.[2][4] The two groups may actually be separate parts of a much larger group.[7]



  1. ^ a b c d e f g h 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. 
  2. ^ a b c d e f g h i j k 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. 
  3. ^ a b c d R. B. Tully (1988). Nearby Galaxies Catalog. Cambridge: Cambridge University Press. ISBN 0-521-35299-1. 
  4. ^ a b c d e P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel (1992). "Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members". Astronomy and Astrophysics Supplement 93: 211–233. Bibcode:1992A&AS...93..211F. 
  5. ^ R. B. Tully (1982). "The Local Supercluster". Astrophysical Journal 257: 389–422. Bibcode:1982ApJ...257..389T. doi:10.1086/159999. 
  6. ^ a b c d e "NASA/IPAC Extragalactic Database". Results for various galaxies. Retrieved 2006-10-24. 
  7. ^ a b L. Ferrarese, H. C. Ford, J. Huchra, R. C. Kennicutt Jr., J. R. Mould, S. Sakai, W. L. Freedman, P. B. Stetson, B. F. Madore, B. K. Gibson, J. A. Graham, S. M. Hughes, G. D. Illingworth, D. D. Kelson, L. Macri, K. Sebo, N. A. Silbermann (2000). "A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful for Distance Determinations". Astrophysical Journal Supplement 128 (2): 431–459. arXiv:astro-ph/9910501. Bibcode:2000ApJS..128..431F. doi:10.1086/313391. 
  8. ^ "A galactic maelstrom". Retrieved 31 August 2015. 

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