NGC 5784

{{Short description|Galaxy in the constellation Boötes}} {{Use dmy dates|date=November 2024}} {{Sky|14|54|16.4726|+|42|33|28.356}} {{Infobox Galaxy | name = [[New General Catalogue|NGC]] 5784 | image = NGC 5784 SDSS2.jpg | caption = NGC 5784 imaged by [[Sloan Digital Sky Survey]] | constellation name = [[Boötes]] | epoch = [[J2000]] | type = S0<ref name="ned">{{cite web | website = NASA/IPAC Extragalactic Database | publisher = [[NASA]] and [[California Institute of Technology|Caltech]] | title = Results for object NGC 5784 | url = https://ned.ipac.caltech.edu/byname?objname=NGC+5784 | access-date = 8 August 2024}}</ref> | ra = {{RA|14|54|16.4726}}<ref name="ned" /> | dec = {{DEC|+42|33|28.356}}<ref name="ned" /> | dist_ly = {{convert|81.01 ± 5.68|Mpc|Mly|abbr=on|lk=on|order=flip}}<ref name="ned" /> | z = 0.017912<ref name="ned" /> | h_radial_v = 5370 ± 16 km/s<ref name="ned" /> | appmag_v = 12.4<ref name="ned" /> | size_v = {{Val|1.9|×|1.8|u=arcminute}}{{r|ned}} | size = ~{{convert|45.82|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)<ref name ="ned" /> | names = {{odlist | PGC= 53265 | UGC= 9592 | CGCG= 221-009 | MCG= +07-31-006 | IRAS= 14524+4245 | 2MASX= J14541645+4233279}}<ref name="ned" /> }}

'''NGC 5784''' is a [[lenticular galaxy]] in the [[constellation]] of [[Boötes]]. Its velocity with respect to the [[cosmic microwave background]] is 5493 ± 18 km/s, which corresponds to a [[Hubble's law|Hubble distance]] of 81.01 ± 5.68 [[Megaparsec|Mpc]] (~264 million [[light-years]]).<ref name="ned" /> It was discovered by German-British astronomer [[William Herschel]] on 9 April 1787.<ref name="selig">{{cite web | url = https://cseligman.com/text/atlas/ngc57a.htm#5784 | title = New General Catalogue Objects: NGC{{nbsp}}5784 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 16 December 2024}}</ref>

== NGC 5739 Group == According to Abraham Mahtessian, NGC 5784 is part of the seven member NGC 5739 [[Galaxy group|group]] (also known as [M98j] 234). The other six galaxies are: [[NGC 5598]], [[NGC 5603]], {{ill|NGC 5696|fr}}, {{ill|NGC 5739|fr}}, {{ill|NGC 5787|fr}}, and {{ill|NGC 5860|fr}}.<ref>{{cite journal| doi=10.1007/BF03036100 |title=Groups of galaxies. III. Some empirical characteristics |date=1998 |last1=Mahtessian |first1=A. P. |journal=Astrophysics |volume=41 |issue=3 |pages=308–321 |bibcode=1998Ap.....41..308M }}</ref>

==Supernovae== Two [[supernova]]e have been observed in NGC 5784: * '''SN 2018mef''' ([[type Ia supernova|Type Ia]], mag. 17.52) was discovered by the [[Zwicky Transient Facility]] on 7 June 2018.<ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}2018mef | url=https://www.wis-tns.org/object/2018mef | publisher = [[International Astronomical Union|IAU]] | access-date=16 December 2024}}</ref> * '''SN 2023bch''' (Type Ia, mag. 15.4) was discovered by [[All Sky Automated Survey for SuperNovae|ASAS-SN]] on 30 January 2023.<ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}2023bch | url=https://www.wis-tns.org/object/2023bch | publisher = [[International Astronomical Union|IAU]] | access-date=16 December 2024}}</ref>

== See also == * [[List of NGC objects (5001–6000)]]

==References== {{reflist}}

==External links== * {{commons category-inline}} {{WikiSky}}

[[Category:NGC objects|5784]] [[Category:Principal Galaxies Catalogue objects|053265]] [[Category:MCG objects|+07-31-006]] [[Category:UGC objects|09592]] [[Category:IRAS catalogue objects|14524+4245]] [[Category:Boötes]] [[Category:Astronomical objects discovered in 1787|17870409]] [[Category:Discoveries by William Herschel]] [[Category:Lenticular galaxies]]