NGC 5605

{{Short description|Galaxy in the constellation Libra}} {{Infobox Galaxy | name = [[New General Catalogue|NGC]]{{nbsp}}5605 | image = [[file:NGC 5605 PanS.jpg|250px]] | caption= NGC{{nbsp}}5605 imaged by [[Pan-STARRS]] | constellation name = [[Libra_(constellation)|Libra]] | epoch = [[J2000]] | type = (R')SAB(rs)c pec?<ref name="ned">{{cite web | website = NASA/IPAC Extragalactic Database | publisher = [[NASA]] and [[California_Institute_of_Technology|Caltech]] | title = Results for object NGC 5605 | url = http://ned.ipac.caltech.edu/byname?objname=NGC+5605 | access-date = 1 September 2024}}</ref> | ra = {{RA|14|25|07.57}}<ref name="ned" /> | dec = {{DEC|-13|09|46.8}}<ref name="ned" /> | dist_ly = {{convert|53.61 ± 3.76|Mpc|Mly|abbr=on|lk=on|order=flip}}<ref name="ned" /> | group_cluster = | z = 0.011294<ref name="ned" /> | h_radial_v = 3386 ± 3 km/s<ref name="ned" /> | appmag_v = 12.3<ref name="ned" /> | size_v = {{Val|1.5|×|1.3|u=arcminute}}<ref name="ned" /> | size = ~{{convert|36.50|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)<ref name ="ned" /> | notes = The only galaxy known to have 3 supernovae visible at the same time | names = {{odlist | PGC= 51492 | MCG= -02-37-003 | IRAS= 14223-1256 | 2MASX= J14250757-1309467}}<ref name="ned" /> }}

'''NGC{{nbsp}}5605''' is an [[intermediate spiral galaxy]] in the [[constellation]] of [[Libra_(constellation)|Libra]]. Its velocity with respect to the [[cosmic microwave background]] is 3635 ± 18{{nbsp}}km/s, which corresponds to a [[Hubble's law|Hubble distance]] of {{convert|53.61 ± 3.76|Mpc|Mly|abbr=on|lk=on|order=flip}}.<ref name="ned" /> In addition, three ''non redshift'' measurements give a farther distance of {{convert|59.700 ± 0.208|Mpc|Mly|abbr=on|order=flip}}.<ref>{{cite web | url = https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+5605 | title = Distance Results for NGC{{nbsp}}5605 | website = NASA/IPAC EXTRAGALACTIC DATABASE | publisher = [[NASA]] | access-date = 1 September 2024}}</ref> The galaxy was discovered by German-British astronomer [[William Herschel]] on 11 May 1784.<ref name="selig">{{cite web | url = https://cseligman.com/text/atlas/ngc56.htm#5605 | title = NGC{{nbsp}}5605 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 1 September 2024 }}</ref>

The [[SIMBAD]] database lists NGC{{nbsp}}5605 as 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> {{cite simbad |title=NGC 5605 |access-date=1 September 2024 }}</ref>

== Unique Trio of Supernovae== NGC{{nbsp}}5605 is the only galaxy known where three [[supernova]]e were visible at the same time:<ref>{{cite web | url = https://www.rochesterastronomy.org/snimages/double_sn.html | title = Multiple Supernovae in the same galaxy | last = Bishop | first = David | website = Rochester Astronomy | access-date = 1 September 2024 }}</ref><ref>{{cite web | url = https://www.syfy.com/syfy-wire/bad-astronomy-three-supernovae-at-the-same-time-in-a-single-galaxy | title = For the first time, three supernovae are seen at the same time in a single galaxy! | last = Plait | first = Phil | date = 12 April 2022 | website = SYFY | publisher = NBCUniversal | access-date = 1 September 2024 }}</ref> * '''SN{{nbsp}}2022bn''' ([[Type_Ib_and_Ic_supernovae|Type{{nbsp}}Ib]], mag. 18.55) was discovered by [[Asteroid Terrestrial-impact Last Alert System|ATLAS]] on 5 January 2022.<ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}2022bn | url=https://www.wis-tns.org/object/2022bn | publisher = [[International_Astronomical_Union|IAU]] | access-date=1 September 2024}}</ref> * '''SN 2022ec''' ([[Type_II_supernova|Type{{nbsp}}II]], mag. 18.835) was discovered by ATLAS on 7 January 2022.<ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}2022ec | url=https://www.wis-tns.org/object/2022ec | publisher = [[International_Astronomical_Union|IAU]] | access-date=1 September 2024}}</ref> * '''SN 2022pv''' (Type{{nbsp}}II, mag. 19.165) was discovered by ATLAS on 13 January 2022.<ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}2022pv | url=https://www.wis-tns.org/object/2022pv | publisher = [[International_Astronomical_Union|IAU]] | access-date=1 September 2024}}</ref>

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

==References== {{reflist}}

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

[[Category:NGC objects|5605]] [[Category:Principal Galaxies Catalogue objects|051492]] [[Category:MCG objects|-02-37-003]] [[Category:IRAS catalogue objects|14223-1256]] [[Category:Libra_(constellation)]] [[Category:Astronomical objects discovered in 1784|17840511]] [[Category:Discoveries by William Herschel]] [[Category:Intermediate spiral galaxies]] [[Category:Seyfert galaxies]]