{{short description|Galaxy group in the constellation Leo}} {{redirect|Leo Group|the company|The Leo Group|the cluster of galaxies|Leo Cluster|the galaxy triplet|Leo Triplet}} {{sky|10|48|34.7|+|12|40|15|37000000}} {{Galaxy cluster | name = M96 Group | image = 350px |caption = M95 (left) and M96 (right). Credit:Scott Anttila. | constellation = Leo<ref name="garcia1993">{{cite journal | author=A. Garcia | title=General study of group membership. II - Determination of nearby groups | journal=Astronomy and Astrophysics Supplement | date=1993 | volume=100 | pages=47–90 | bibcode=1993A&AS..100...47G}}</ref><ref name="giuricinetal2002">{{cite journal |author1=G. Giuricin |author2=C. Marinoni |author3=L. Ceriani |author4=A. Pisani | title=Nearby Optical Galaxies: Selection of the Sample and Identification of Groups | journal=Astrophysical Journal | date=2000 | volume=543 | issue=1 | pages=178–194 | bibcode=2000ApJ...543..178G | doi=10.1086/317070|arxiv = astro-ph/0001140 |s2cid=9618325 }}</ref> | epoch=J2000<ref name="ned-M96Group"> {{cite web | publisher=NASA/IPAC Extragalactic Database | title=MESSIER 096 GROUP | url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=Leo+Group&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES | accessdate=2015-11-05}}</ref><ref name="simbad-M96Group"> {{cite simbad | title=NAME M96 GROUP | accessdate=2015-10-24}}</ref> | ra = {{RA|10|48|34.7}} <ref name="ned-M96Group"/> | dec= {{DEC|+12|40|15}} <ref name="ned-M96Group"/> | distance= {{convert|11.3|Mpc|Mly|abbr=on|lk=on}} <ref name="ned-M96Group"/> | member_no = 8-24<ref name="garcia1993" /><ref name="giuricinetal2002" /><ref name="nbg" /><ref name="fouqueetal1992" /> | brightest_member = M96<ref name="garcia1993" /><ref name="giuricinetal2002" /> | other_names = Leo I Group,<ref name="fouqueetal1992" /> LGG 217,<ref name="garcia1993" /> NOGG H 507,<ref name="giuricinetal2002" /><br />NOGG P1 498,<ref name="giuricinetal2002" /> NOGG P2 507<ref name="giuricinetal2002" /> }}
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.<ref name="garcia1993" /><ref name="giuricinetal2002" /><ref name="nbg">{{cite book | author=R. B. Tully | date=1988 | title=Nearby Galaxies Catalog | edition= | publisher=Cambridge University Press | location=Cambridge | isbn=0-521-35299-1}}</ref><ref name="fouqueetal1992">{{cite journal |author1=P. Fouque |author2=E. Gourgoulhon |author3=P. Chamaraux |author4=G. Paturel | title=Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members | journal=Astronomy and Astrophysics Supplement | date=1992 | volume=93 | pages=211–233 | bibcode=1992A&AS...93..211F}}</ref> 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).<ref name="tully1982">{{cite journal | author= R. B. Tully | title=The Local Supercluster | journal=Astrophysical Journal | date=1982 | volume=257 | pages=389–422 | bibcode=1982ApJ...257..389T | doi=10.1086/159999| doi-access=free }}</ref>
==Members==
The table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog,<ref name="nbg" /> the survey of Fouque et al.,<ref name="fouqueetal1992" /> the Lyons Groups of Galaxies (LGG) Catalog,<ref name="garcia1993" /> and the three group lists created from the Nearby Optical Galaxy sample of Giuricin et al.<ref name="giuricinetal2002" />
{{clear}} {| class="wikitable" style="text-align:center;" |+'''Members of the M96 Group''' |- ! Name ! Type<ref name="ned">{{cite web | title=NASA/IPAC Extragalactic Database | work=Results for various galaxies | url=http://nedwww.ipac.caltech.edu/ | accessdate=2006-10-24}}</ref><ref name="simbad"> {{cite web | title=SIMBAD | url=http://simbad.u-strasbg.fr | accessdate=2015-10-24}}</ref> ! R.A. (J2000)<ref name="ned" /><ref name="simbad" /> ! Dec. (J2000)<ref name="ned" /><ref name="simbad" /> ! Redshift (km/s)<ref name="ned" /><ref name="simbad" /> ! Apparent Magnitude<ref name="ned" /><ref name="simbad" /> |- | M95 | SB(r)b | {{RA|10|43|57.7}} | {{DEC|+11|42|14}} | 778 ± 4 | 11.4 |- | M96 | SAB(rs)ab | {{RA|10|46|45.7}} | {{DEC|+11|49|12}} | 897 ± 4 | 10.1 |- | M105 | E1 | {{RA|10|47|49.6}} | {{DEC|+12|34|54}} | 911 ± 2 | 10.2 |- | NGC 3299 | SAB(s)dm | {{RA|10|36|23.8}} | {{DEC|+12|42|27}} | 641 ± 6 | 13.3 |- | NGC 3377 | E5.5 | {{RA|10|47|42.4|}} | {{DEC|+13|59|08}} | 665 ± 2 | 11.2 |- | NGC 3384 | E7 | {{RA|10|48|16.9}} | {{DEC|+12|37|46}} | 704 ± 2 | 10.9 |- | NGC 3412 | SB(s)0 | {{RA|10|50|53.3}} | {{DEC|+13|24|44}} | 841 ± 2 | 11.5 |- | NGC 3489 | SAB(rs)0 | {{RA|11|00|18.6}} | {{DEC|+13|54|04}} | 677 ± 2 | 11.1 |- | Leo Ring | H I region | {{RA|10|48|19.0}} | {{DEC|+12|41|21}} | 960 ± 80 | |- |}
==Nearby groups==
The Leo Triplet, which includes the spiral galaxies M65, M66, and NGC 3628,<ref name="garcia1993" /><ref name="giuricinetal2002" /><ref name="nbg" /> is located physically near the M96 Group.<ref name="ferrareseetal00">{{cite journal |author1=L. Ferrarese |author2=H. C. Ford |author3=J. Huchra |author4=R. C. Kennicutt Jr. |author5=J. R. Mould |author6=S. Sakai |author7=W. L. Freedman |author8=P. B. Stetson |author9=B. F. Madore |author10=B. K. Gibson |author11=J. A. Graham |author12=S. M. Hughes |author13=G. D. Illingworth |author14=D. D. Kelson |author15=L. Macri |author16=K. Sebo |author17=N. A. Silbermann | title=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 | journal=Astrophysical Journal Supplement | date=2000 | volume=128 | issue=2 | pages=431–459 | bibcode=2000ApJS..128..431F | doi=10.1086/313391|arxiv = astro-ph/9910501 |s2cid=121612286 }}</ref> Some group identification algorithms actually identify the Leo Triplet at part of the M96 Group.<ref name="giuricinetal2002" /><ref name="fouqueetal1992" /> The two groups may actually be separate parts of a much larger group.<ref name="ferrareseetal00" />
[[File:A galactic maelstrom.jpg|thumb|M96 Group also includes the bright galaxies Messier 105 and Messier 95.<ref>{{cite web|title=A galactic maelstrom|url=http://www.spacetelescope.org/images/potw1535a/|accessdate=31 August 2015}}</ref>]]
==See also== *Leo II Groups *Virgo II Groups *Virgo III Groups
==References==
{{Reflist}}
==External links== * [http://www.beskeen.com/gallery/galaxy/m95m96m105.shtml Leo I Galaxy Group]
Category:M96 Group Category:Leo (constellation)