Editing Seyfert's Sextet

{{Short description|Group of galaxies in the constellation Serpens}}
{{Galaxy cluster
| name = Seyfert's Sextet
| image = [[File:Seyfert Sextet full.jpg|250px]]
|caption = A [[Hubble Space Telescope]] (HST) image of Seyfert's Sextet. All galaxies (left to right):
[[NGC 6027e]], [[NGC 6027]], [[NGC 6027d]] (below NGC 6027), [[NGC 6027c]] (bottommost galaxy), [[NGC 6027a]] ([[Lenticular galaxy]] with a [[dust lane]] above NGC 6027c), [[NGC 6027b]] (above NGC 6027a).<br />Credit: HST/[[NASA]]/[[ESA]].
| epoch=[[J2000]]
| ra={{RA|15|59|11.9}}<ref name="ned">{{cite web
  | title=NASA/IPAC Extragalactic Database
  | work=Results for HCG 79
  | url=http://nedwww.ipac.caltech.edu/
  | accessdate=2006-10-29}}</ref>
| dec={{DEC|+20|45|31}}<ref name="ned" />
| constellation = [[Serpens]]
| member_no = 6<ref name="ned" />
| brightest_member = [[NGC 6027]]
| other_names = Serpens Sextet, HCG 79, [[Uppsala General Catalogue|UGC]] 10116,<br /> [[VV]] 115, VII Zw 631<ref name="ned" />
}}
'''Seyfert's Sextet''' is a [[Galaxy group|group of galaxies]] about [[1 yottametre|190 million]] [[light-year]]s away<ref>{{cite web |url=http://hubblesite.org/newscenter/archive/releases/2002/22/image/a/ |title=HubbleSite - NewsCenter - Hubble Watches Galaxies Engage in Dance of Destruction (12/12/2002) - Release Images |website=hubblesite.org |url-status=dead |archive-url=https://web.archive.org/web/20070110025235/http://hubblesite.org/newscenter/archive/releases/2002/22/image/a/ |archive-date=2007-01-10}} </ref> in the [[constellation]] [[Serpens]]. The group appears to contain six members, but one of the galaxies, [[NGC 6027d]], is a background object (700 million light years behind the group) and another "galaxy," [[NGC 6027e]], is actually a part of the tail from galaxy [[NGC 6027]]. The [[interacting galaxies|gravitational interaction]] among these galaxies should continue for hundreds of millions of years. Ultimately, the galaxies will merge to form a single giant [[elliptical galaxy]].

==Discovery==
[[France|French]] astronomer [[Édouard Stephan]] discovered [[NGC 6027]] on 20 March 1882, but he was unable to resolve the individual galaxies in the group.<ref name="selig">{{cite web | url = https://cseligman.com/text/atlas/ngc60.htm#6027 | title = New General Catalogue Objects: NGC{{nbsp}}6027 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 28 August 2024 }}</ref> The group members were discovered by [[Carl Keenan Seyfert]] using photographic plates made at the [[Barnard Observatory (Vanderbilt)|Barnard Observatory]] of [[Vanderbilt University]].  When these results were first published in 1951, this group was the most compact group ever identified.<ref name="bajajaetal1984">{{cite journal
  | author=C. K. Seyfert
  | title=A Dense Group of Galaxies in Serpens
  | journal=[[Publications of the Astronomical Society of the Pacific]]
  | year=1951
  | volume=371
  | issue=371
 | pages=72–75
  | bibcode=1951PASP...63...72S
  | doi=10.1086/126319| doi-access=free
  }}</ref>

== Members ==
{| class="wikitable" style="text-align:center;border-collapse:collapse;" cellpadding="2"
|+ '''Members of Seyfert's Sextet'''
|-
! style="background:#efefef;" | Name
! style="background:#efefef;" | [[Galaxy morphological classification|Type]]
! style="background:#efefef;" | Distance from [[Sun]]<br />(million [[light-year|ly]])
! style="background:#efefef;" | [[Apparent magnitude|Magnitude]]
|-
| [[NGC 6027]]
| S0 pec.
| ~190
| +14.7
|-
| [[NGC 6027a]]
| Sa pec.
| ~190
| +15.4
|-
| [[NGC 6027b]]
| S0 pec.
| ~190
| +15.4
|-
| [[NGC 6027c]]
| SB(S)c
| ~190
| +16
|-
| [[NGC 6027d]]
| SB(S)bc pec.
| ~877<ref name="ngc6027d">{{cite web
  | title=NASA/IPAC Extragalactic Database
  | work=Results for NGC 6027d
  | url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+6027d&img_stamp=yes&extend=no
  | accessdate=2013-04-02}}</ref>
| +15.6
|-
| [[NGC 6027e]]
| Tidal Tail.
| ~190
| +16.5
|}

==See also==
* [[Wild's Triplet]]
* [[Zwicky's Triplet]]
* [[Robert's Quartet]]
* [[Stephan's Quintet]] and [[NGC 7331 Group]] (also known as the Deer Lick Group); about half a degree northeast of Stephan's Quintet
* [[Copeland Septet]]

==References==
{{Reflist}}

==External links==
*[http://www.ne.jp/asahi/stellar/scenes/object_e/ngc6027.htm ASAHI Net Free Address Service: Seyfert's Sextet (Galaxy Group in Serpens)] {{Webarchive|url=https://web.archive.org/web/20090305100245/http://www.ne.jp/asahi/stellar/scenes/object_e/ngc6027.htm |date=2009-03-05 }}
*{{APOD |date=24 January 2003 |title=Seyfert's Sextet}}
*[https://web.archive.org/web/20070227143018/http://www.seds.org/~spider/spider/Misc/seyfert6.html SEDS: Seyfert's Sextet (HCG 79)]
*{{WikiSky|NGC 6027}}

{{Sky|15|59|11.9|+|20|45|31|190000000}}
{{Serpens|state=collapsed}}

{{DEFAULTSORT:Seyfert's Sextet}}
[[Category:Hickson Compact Groups|79]]
[[Category:UGC objects|10116]]
[[Category:Serpens]]