{{Short description|Galaxy in the constellation Coma Berenices}} {{Notability|Astro|date=April 2024}} {{Infobox galaxy|name=IC 831|image=File:IC831 - SDSS DR14.jpg|caption=[[Sloan Digital Sky Survey]] of IC 831|constellation name=[[Coma Berenices (constellation)|Coma Berenices]]|z=0.02129|h_radial_v=6,406 km/s |epoch=J2000 |ra={{RA|12|52|44.10}}<ref name=LEDA/> |dec={{DEC|+26|28|13.8}}<ref name=LEDA/> |dist_ly=300 Mly (92 Mpc)|type=E|size=60,000 ly|appmag_v=17.93|names=[[Principal Galaxies Catalogue|PGC]] 43708, [[2MASX]] J12524408+2628135, [[Morphological Catalogue of Galaxies|MCG]]+05-30-113, AGC 221803, CAIRNS J125244.02+262813.6, [[Sloan Digital Sky Survey|SDSS]] J125244.06+262813.4, [DFO95] 113, [[Lyon-Meudon Extragalactic Database|LEDA]] 43708|notes=Galaxy host of supernova [[iPTF14atg]]}}
'''IC 831''' is a type E-S0<ref name=LEDA>{{Cite web |title=HyperLeda -object description |url=http://atlas.obs-hp.fr/hyperleda/ledacat.cgi?o=IC%20831 |access-date=2024-04-22 |website=atlas.obs-hp.fr}}</ref> [[elliptical galaxy]] located 300 million [[light-year]]s away from the [[Solar System]] in the constellation of [[Coma Berenices]].<ref name=":0">{{Cite web |title=Your NED Search Results |url=https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=32050&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1 |access-date=2024-04-22 |website=ned.ipac.caltech.edu}}</ref><ref>{{Cite web |last=Ford |first=Dominic |title=IC831 (Galaxy) |url=https://in-the-sky.org//data/object.php?id=IC831 |access-date=2024-04-22 |website=In-The-Sky.org |language=en}}</ref> It is estimated to be 60,000 light-years in diameter<ref name=":0" /> and was first discovered on 25 February 1892 by [[Rudolf Ferdinand Spitaler|Rudolf Spitaler]], an Austrian astronomer.<ref>{{Cite web |title=Index Catalog Objects: IC 800 - 849 |url=https://cseligman.com/text/atlas/ic8.htm#ic831 |access-date=2024-04-22 |website=cseligman.com}}</ref> It is not known whether it has an [[active galactic nucleus]].
== Supernova == [[Type Ia supernova]], [[iPTF14atg]] was discovered in IC 831 on May 3, 2015, which was similar to [[SN 2002es]] that exploded prior to that, in [[UGC 2708]], a [[lenticular galaxy]].<ref>{{Cite web |title=Supernova hits star, results shocking |url=https://www.spacedaily.com/reports/Supernova_hits_star_results_shocking_999.html |access-date=2024-04-22 |website=spacedaily.com}}</ref><ref>{{Cite journal |last1=Kromer |first1=M. |last2=Fremling |first2=C. |last3=Pakmor |first3=R. |last4=Taubenberger |first4=S. |last5=Amanullah |first5=R. |last6=Cenko |first6=S. B. |last7=Fransson |first7=C. |last8=Goobar |first8=A. |last9=Leloudas |first9=G. |last10=Taddia |first10=F. |last11=Roepke |first11=F. K. |last12=Seitenzahl |first12=I. R. |last13=Sim |first13=S. A. |last14=Sollerman |first14=J. |date=2016-07-11 |title=The peculiar Type Ia supernova iPTF14atg: Chandrasekhar-mass explosion or violent merger? |journal=Monthly Notices of the Royal Astronomical Society |volume=459 |issue=4 |pages=4428–4439 |doi=10.1093/mnras/stw962 |doi-access=free |issn=0035-8711|arxiv=1604.05730 }}</ref> The progenitor type was a [[white dwarf]], in which when it exploded, some of the shockwaves impacted its companion star.<ref>{{Cite web |title=Supernova collides with its companion star |url=https://www.sciencedaily.com/releases/2015/05/150520133557.htm |access-date=2024-04-22 |website=ScienceDaily |language=en}}</ref> It was discovered by [[Palomar Transient Factory|Intermediate Palomar Transient Factory]] in California.
== References == <references />
{{Coma Berenices}}
[[Category:IC objects|0831]] [[Category:Elliptical galaxies]] [[Category:Coma Berenices]] [[Category:Principal Galaxies Catalogue objects|043708]] [[Category:LEDA objects|043708]] [[Category:Astronomical objects discovered in 1892]] [[Category:MCG objects|+05-30-113]] [[Category:Discoveries by Rudolf Ferdinand Spitaler]]