{{Short description|Galaxy in the constellation Coma Berenices}} {{Use dmy dates|date=December 2025}} {{Infobox Galaxy | name = [[New General Catalogue|NGC]] 4189 | image = NGC 4189 imaged by Legacy Surveys.jpg | caption = NGC 4189 imaged by [[Dark Energy Spectroscopic Instrument#DESI Legacy Imaging Surveys|Legacy Surveys]] | alt = | epoch = [[J2000]] | constellation name = [[Coma Berenices]] | ra = {{RA|12|13|47.2668}}{{r|ned}} | dec = {{DEC|+13|25|29.074}}{{r|ned}} | z = {{val|0.006997|0.0000110}}{{r|ned}} | h_radial_v = {{val|2098|3|u=km/s|fmt=commas}}{{r|ned}} | dist_ly = {{convert|29.935 ± 1.419|Mpc|Mly|abbr=on|lk=on|order=flip}}{{r|ned}} | group_cluster = M88 group (LGG 285) | type = SAB(rs)cd{{r|ned}} | size = ~{{convert|31.78|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{r|ned}} | appmag_v = 12.5B{{r|ned}} | size_v = {{Val|2.4|×|1.7|u=arcminute}}{{r|ned}} | notes = | names = {{odlist | 2MASX= J12134727+1325294 | CGCG= 069-092 | IC= 3050 | IRAS= 12112+1342 | MCG= +02-31-054 | PGC= 39025 | UGC= 7235 | name= VCC 89}}{{r|ned}} }}
'''NGC 4189''' is an [[intermediate spiral galaxy]] in the [[constellation]] of [[Coma Berenices]]. Its velocity with respect to the [[cosmic microwave background]] is {{val|2432|24|u=km/s|fmt=commas}}, which corresponds to a [[Hubble's law|Hubble distance]] of {{convert|35.88 ± 2.54|Mpc|Mly|abbr=on|lk=on|order=flip}}.{{r|ned}} However, 20 ''non-redshift'' measurements give a closer mean distance of {{convert|29.935 ± 1.419|Mpc|Mly|abbr=on|lk=off|order=flip}}.{{r|ned-distance}} It was discovered by German-British astronomer [[William Herschel]] on 8 April 1784.{{r|herschel|selig}} It was also observed by German astronomer [[Friedrich Karl Arnold Schwassmann|Arnold Schwassmann]] on 16 November 1900, and added to the [[New General Catalogue#Index Catalogue|Index Catalogue]] as '''IC 3050'''.{{r|selig}}
NGC 4189 has a possible [[active galactic nucleus]], i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.{{r|AGN|SIMBAD}}
==M88 group== According to A.M. Garcia, NGC 4189 is a member of the M88 group (also known as [[Lyons Groups of Galaxies|LGG]] 285). This [[galaxy group|group of galaxies]] contains at least 44 members, of which 17 appear in the [[New General Catalogue]] and 18 in the Index Catalogue.{{r|garcia|LGG285}}
==Supernova== One [[supernova]] has been observed in NGC 4189: * '''SN 1966E''' (type unknown, mag. 15.5) was discovered by Swiss astronomer [[Paul Wild (Swiss astronomer)|Paul Wild]] on 12 July 1966.{{r|IAUC1960|TNS-1966E}}
== See also == * [[List of NGC objects (4001–5000)]]
==References== <references>
<ref name=ned>{{cite web | website = NASA/IPAC Extragalactic Database | publisher = [[NASA]] and [[California Institute of Technology|Caltech]] | title = Results for object NGC 4189 | url = https://ned.ipac.caltech.edu/byname?objname=NGC+4189 | access-date = 15 December 2025}}</ref>
<ref name=ned-distance>{{cite web | url = https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4189 | title = Distance Results for NGC 4189 | website = NASA/IPAC Extragalactic Database | publisher = [[NASA]] | access-date = 15 December 2025}}</ref>
<ref name=herschel>{{cite journal |last=Herschel |first=William |date=1786 |title=Catalogue of One Thousand New Nebulae and Clusters of Stars |journal=[[Philosophical Transactions of the Royal Society of London]] |volume=76 |pages=457–499 |bibcode=1786RSPT...76..457H |doi=10.1098/rstl.1786.0027 |url=https://zenodo.org/record/1432282/files/article.pdf |doi-access=free }}</ref>
<ref name=selig>{{cite web | url = https://cseligman.com/text/atlas/ngc41a.htm#4189 | title = New General Catalogue Objects: NGC 4189 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 15 December 2025}}</ref>
<ref name=SIMBAD>{{cite simbad | title=NGC 4189 | access-date=15 December 2025}}</ref>
<ref name=AGN>{{cite journal |last1=Asmus |first1=D. |last2=Greenwell |first2=C. L. |last3=Gandhi |first3=P. |last4=Boorman |first4=P. G. |last5=Aird |first5=J. |last6=Alexander |first6=D. M. |last7=Assef |first7=R. J. |last8=Baldi |first8=R. D. |last9=Davies |first9=R. I. |last10=Hönig |first10=S. F. |last11=Ricci |first11=C. |last12=Rosario |first12=D. J. |last13=Salvato |first13=M. |last14=Shankar |first14=F. |last15=Stern |first15=D. |title=Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC |journal=Monthly Notices of the Royal Astronomical Society |date=2020 |volume=494 |issue=2 |page=1784 |doi=10.1093/mnras/staa766 |doi-access=free |arxiv=2003.05959 |bibcode=2020MNRAS.494.1784A}}</ref>
<ref name=garcia>{{cite journal | bibcode=1993A&AS..100...47G | title=General study of group membership. II. Determination of nearby groups | last1=Garcia | first1=A. M. | journal=Astronomy and Astrophysics Supplement Series | date=1993 | volume=100 | page=47}}</ref>
<ref name=LGG285>{{cite simbad | title=LGG 285 | access-date=15 December 2025}}</ref>
<ref name=IAUC1960>{{cite journal | url = http://www.cbat.eps.harvard.edu/IAUCs/IAUC1960.jpg | title = SUPERNOVA IN NGC 4189 | last1 = Schürer | first1 = M. | last2 = Wild | first2 = P. | editor-last1 = Gingerich | editor-first1 = Owen | date = 15 July 1966 | journal = Central Bureau for Astronomical Telegrams | volume = 1960 | pages = 1 | publisher = [[International Astronomical Union|IAU]] | access-date = 15 December 2025 }}</ref>
<ref name=TNS-1966E>{{cite web | website=Transient Name Server | title= SN 1966E | url= https://www.wis-tns.org/object/1966E | publisher= [[International Astronomical Union|IAU]] | access-date= 15 December 2025}}</ref>
</references>
==External links== * {{commons category-inline}} {{WikiSky}}
{{Sky|12|13|47.2668|+|13|25|29.074}} {{Coma Berenices}} {{ngc50}} {{Catalogs|NGC=4189|UGC=7235}}
[[Category:NGC objects|4189]] [[Category:IC objects]] [[Category:UGC objects|07235]] [[Category:MCG objects|+02-31-054]] [[Category:IRAS catalogue objects|12112+1342]] [[Category:Principal Galaxies Catalogue objects|039025]] [[Category:Coma Berenices]] [[Category:Intermediate spiral galaxies]] [[Category:Astronomical objects discovered in 1784|17840408]] [[Category:Discoveries by William Herschel]] [[Category:Virgo Cluster]]