{{Short description|Interacting galaxies in the constellation Centaurus}} {{Infobox Galaxy | name = [[New General Catalogue|NGC]] 5291 | image = Eso1547a.tif | caption = NGC 5291 image from [[ESO]]’s [[Very Large Telescope]] at the [[Paranal Observatory]]. | epoch = [[J2000]] | constellation name = [[Centaurus (constellation)|Centaurus]] | type = E pec<ref name="ned">{{cite web | website=NASA/IPAC Extragalactic Database | title=Results for object NGC 5291 | url=https://ned.ipac.caltech.edu/byname?objname=NGC+5291 | access-date=2007-04-03}}</ref> | ra = {{RA|13|47|24.5087}}<ref name="ned" /> | dec = {{DEC|-30|24|25.603}}<ref name="ned" /> | dist_ly = {{convert|54.400 ± 3.000|Mpc|Mly|abbr=on|lk=on|order=flip}}{{r|ned}} | h_radial_v = {{val|4378|6|u=km/s|fmt=commas}}{{r|ned}} | z = {{val|0.014602|0.000019}}{{r|ned}} | appmag_v = 15.1<ref name="ned" /> | size_v = {{Val|1.1|×|0.7|u=arcminute}}{{r|ned}} | size = ~{{convert|26.16|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{r|ned}} | notes = | names = {{odlist | PGC= 48893 | name= ESO 445- G 030 | MCG= -05-33-006}}<ref name="ned" /> }}
'''NGC 5291''' is a system of [[interacting galaxies]] in the [[constellation]] [[Centaurus (constellation)|Centaurus]]. Its velocity with respect to the [[cosmic microwave background]] is {{val|4648|20|u=km/s|fmt=commas}}, which corresponds to a [[Hubble's law|Hubble distance]] of {{convert|68.55 ± 4.81|Mpc|Mly|abbr=on|lk=on|order=flip}}.{{r|ned}} However, two ''non-redshift'' measurements give a closer mean distance of {{convert|54.400 ± 3.000|Mpc|Mly|abbr=on|lk=off|order=flip}}.<ref name=ned-distance>{{cite web | url = https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+5291 | title = Distance Results for NGC 5291 | website = NASA/IPAC Extragalactic Database | publisher = [[NASA]] | access-date = 27 October 2025}}</ref> It was discovered by British astronomer [[John Herschel]] on 8 May 1834.<ref name="selig">{{cite web | url = https://cseligman.com/text/atlas/ngc52a.htm#5291 | title = New General Catalogue Objects: NGC 5291 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 27 October 2025}}</ref>
NGC 5291 is surrounded by a collisional ring, containing a young and star-forming tidal dwarf galaxy,<ref>{{cite journal | author=Médéric Boquien | display-authors=4 | author2=Pierre-Alain Duc | author3=Jonathan Braine | author4=Elias Brinks | author5=Ute Lisenfeld | author6=Vassilis Charmandaris | name-list-style=amp| title=Polychromatic view of intergalactic star formation in NGC 5291 | journal=Astronomy & Astrophysics | date=2007 | volume=467 | issue=1 | pages=93–106 | bibcode=2007A&A...467...93B | doi=10.1051/0004-6361:20066692|arxiv = astro-ph/0703002 | s2cid=5822678 }}</ref> where [[dark matter]] has been detected.<ref>{{cite journal | author=Frédéric Bournaud | display-authors=4 | author2=Pierre-Alain Duc | author3=Elias Brinks | author4=Médéric Boquien | author5=Philippe Amram | author6=Ute Lisenfeld | author7=Bärbel S. Koribalski | author7-link=Bärbel Koribalski | author8=Fabian Walter | author9=Vassilis Charmandaris | name-list-style=amp | title=Missing Mass in Collisional Debris from Galaxies | journal=Science | date=2007 | volume=316 | pages=1166–1169 | bibcode=2007Sci...316.1166B | doi=10.1126/science.1142114 | pmid=17495138 | issue=5828 | arxiv=0705.1356| s2cid=20946839 }}</ref> It is also a [[Seyfert galaxy|Seyfert]] II galaxy, i.e. it has a [[quasar]]-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.<ref name=SIMBAD>{{cite simbad | title=NGC 5291 | access-date=27 October 2025}}</ref>
==See also== * [[List of NGC objects (5001–6000)]]
==References== {{reflist}}
==External links== * [https://web.archive.org/web/20070709112139/http://sscws1.ipac.caltech.edu/Imagegallery/image.php?image_name=sig05-021 Spitzer Space Telescope page on NGC 5291] * [http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+5291&extend=no&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 detailed info. on NGC 5291] * [http://www.atnf.csiro.au/people/bkoribal/ngc5291/ Link to NGC 5291]
{{Astronomical catalogs|NGC=5291|PGC=48893}} {{NGC objects:5000-5499}} {{Centaurus}} {{Sky|13|47|24.5087|-|30|24|25.603}}
{{DEFAULTSORT:NGC 5291}} [[Category:NGC objects|5291]] [[Category:Principal Galaxies Catalogue objects|048893]] [[Category:Centaurus]] [[Category:Interacting galaxies]] [[Category:Elliptical galaxies]] [[Category:Seyfert galaxies]] [[Category:Discoveries by John Herschel]] [[Category:Astronomical objects discovered in 1834|18340508]] [[Category:ESO objects|445- G 030]]
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