{{Short description|Group of galaxies in the constellation Draco}} {{Galaxy cluster | name = [[New General Catalogue|NGC]] 5866 Group | image =[[File:Ngc5866 hst big.png|300px]] | caption = [[NGC 5866]], one of the brightest galaxies in the NGC 5866 Group. | credit = [[NASA]]/[[ESA]] | epoch=[[J2000]] | ra = 15<sup>h</sup> 12<sup>m</sup><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 | author=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> | dec = +56° 26{{prime}}<ref name="garcia1993" /><ref name="giuricinetal2002" /> | constellation = [[Draco (constellation)|Draco]] | member_no = 3–7<ref name="garcia1993" /><ref name="giuricinetal2002" /><ref name="nbg" /> | brightest_member = [[NGC 5907]]<ref name="garcia1993" /><ref name="giuricinetal2002" /> | other_names = [[New General Catalogue|NGC]] 5907 Group, [[Lyons Groups of Galaxies|LGG]] 396,<ref name="garcia1993" /> NOGG H 836,<ref name="giuricinetal2002" /><br />NOGG P1 841,<ref name="giuricinetal2002" /> NOGG P2 856<ref name="giuricinetal2002" /> }} The '''NGC 5866 Group''' is a small [[group of galaxies]] located in the [[constellation]] [[Draco (constellation)|Draco]]. The group is named after [[NGC 5866]], the galaxy with the highest [[apparent magnitude]] in the group, although some galaxy group catalogs list [[NGC 5907]] as the brightest member.<ref name="garcia1993" /><ref name="giuricinetal2002" />
==Members== The table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog,<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> 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" />
{| class="wikitable" style="text-align:center;" |+'''Members of the NGC 5866 Group''' |- ! Name ! [[Galaxy morphological classification|Type]]<ref name="ned">{{cite web | title=NASA/IPAC Extragalactic Database | work=Results for various galaxies | url=http://nedwww.ipac.caltech.edu/ | access-date=2006-10-17}}</ref> ! [[Right Ascension|R.A.]] ([[J2000]])<ref name="ned" /> ! [[Declination|Dec.]] ([[J2000]])<ref name="ned" /> ! [[Redshift]] (km/[[second|s]])<ref name="ned" /> ! [[Apparent Magnitude]]<ref name="ned" /> |- | [[NGC 5866]] | S0 | {{RA|15|06|29.5}} | {{DEC|+55|45|48}} | 672 ± 9 | 10.7 |- | [[NGC 5879]] | SA(rs)bc | {{RA|15|09|46.8}} | {{DEC|+57|00|01}} | 772 ± 5 | 12.4 |- | [[NGC 5907]] | SA(s)c | {{RA|15|15|53.8}} | {{DEC|+56|19|44}} | 667 ± 3 | 11.1 |- |}
Other possible members galaxies (galaxies listed in only one or two of the lists from the above references) include [[NGC 5866B]], [[NGC 5963]], [[UGC 9776]], and [[UGC 9816]].
==Nearby groups== The NGC 5866 Group is located to the northwest of both the [[M101 Group]] (which contains the [[Pinwheel Galaxy|Pinwheel Galaxy (M101)]] and its companion galaxies) and the [[M51 Group]] (which contains the [[Whirlpool Galaxy|Whirlpool Galaxy (M51)]], the [[Sunflower Galaxy|Sunflower Galaxy (M63)]], and several other galaxies).<ref name="ferrareseetal00">{{cite journal | author=L. Ferrarese | display-authors=4 | 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> The distances to these three groups (as determined from the distances to the individual member galaxies) are similar, which suggests that the M51 Group, the M101 Group, and the NGC 5866 Group are actually part of a large, loose, elongated structure.<ref name="ferrareseetal00" /> However, most group identification methods (including those used by the references cited above) identify these three groups as separate entities.
==See also== * [[Leo Triplet]] – ''another small group of galaxies''
==References== {{Reflist}}
==External links== {{WikiSky}}
{{Sky|15|12|00|+|56|26|00|50300000}}
[[Category:NGC 5866 Group| ]] [[Category:Virgo Supercluster]] [[Category:Draco (constellation)]] [[Category:Galaxy clusters]]