View source for Astronomy:NGC 819

{{Short description|Galaxy in the constellation Triangulum}}
{{Infobox Galaxy
| name               = [[Astronomy:New General Catalogue|NGC]] 819
| image              = NGC819 - SDSS DR14.jpg
| caption            = NGC 819 ([[Astronomy:Sloan Digital Sky Survey|SDSS]])
| epoch = [[Astronomy:J2000.0|J2000.0]]
| constellation name = Triangulum
| ra                 = {{RA|02|08|34.40}} <ref name="Database" />
| dec                = {{DEC|+29|14|03.00}} <ref name="Database" />
| z                  = 0.021935 <ref name="Database" />
| h_radial_v         = {{nowrap|6576 ± 10 [[Metre per second|km/s]]}} <ref name="Database" />
| dist_ly            = 302 M[[Astronomy:Light-year|ly]]
| appmag_b           = 14.30 <ref name="seds" />
| appmag_v           = 13.40 <ref name="seds" />
| type = S? <ref name="Database" />
| size_v = 0.6 x 0.4 <ref name="seds" />
| names = [[Astronomy:Principal Galaxies Catalogue|PGC]] 8174, [[Astronomy:Uppsala General Catalogue|UGC]] 1632
}}

'''NGC 819''' is a [[Spiral galaxy|spiral galaxy]] approximately 302 million [[Astronomy:Light-year|light-year]]s away from Earth in the [[Astronomy:Constellation|constellation]] of Triangulum.<ref name="Database" /><ref name="simbad" /> It forms a visual pair with the galaxy NGC 816 5.7' WNW.<ref name="astronomy-mall" />

== Discovery ==
NGC 819 was discovered by German astronomer [[Biography:Heinrich Louis d'Arrest|Heinrich Louis d'Arrest]] on September 20, 1865 with the 11-inch refractor at [[Place:Copenhagen|Copenhagen]].<ref name="astronomy-mall" /> 
[[Biography:Édouard Stephan|Édouard Stephan]] independently found the galaxy again on September 15, 1871 with the 31" reflector at Marseille Observatory.<ref name="astronomy-mall" />

== Supernovae ==
Supernova '''SN 2007hb''' was discovered in NGC 819 on August 24, 2007 by [[Astronomy:Nearby Supernova Factory|Nearby Supernova Factory]].<ref name="tns_2007hb" /> SN 2007hb had a magnitude of  about 19.5 and was located at RA 02h08m34.0s, DEC +29d14m14s, [[Astronomy:J2000.0|J2000.0]].<ref name="tns_2007hb" /><ref name="Database" /> It was classified as a type SN Ib/c supernova.<ref name="tns_2007hb" />

Supernova '''SN 2016hkn''' was discovered in NGC 819 on October 22, 2016 by Fabio Briganti.<ref name="tns_2016hkn" /> SN 2014bu had a magnitude of about 17.2 and was located at RA 02h08m34.2s, DEC +29d14m11s, [[Astronomy:J2000.0|J2000.0]].<ref name="tns_2016hkn" /><ref name="Database" /> It was classified as a [[Astronomy:Type II supernova|type II supernova]].<ref name="tns_2016hkn" />

[[Image:NGC 0819 SDSS.jpg|thumb|left|NGC 819 ([[Astronomy:Sloan Digital Sky Survey|SDSS]])]]

== See also ==
* [[Astronomy:List of NGC objects (1–1000)|List of NGC objects (1–1000)]]

==References==
{{reflist|refs=
<ref name="Database">{{cite web|title=NASA/IPAC Extragalactic Database|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+819|website=ned.ipac.caltech.edu|access-date=March 4, 2019}}</ref>

<ref name="seds">{{cite web|title=Revised NGC Data for NGC 819|url=http://spider.seds.org/ngc/revngcic.cgi?NGC819|website=spider.seds.org|access-date=March 4, 2019}}</ref>

<ref name="simbad">{{Cite news|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%20819|title=NGC 819|access-date=March 4, 2019}}</ref>

<ref name="astronomy-mall">{{cite web|title=Data for NGC 819|url=http://www.astronomy-mall.com/Adventures.In.Deep.Space/NGC%201%20-%20999%20(11-30-17).htm|website=www.astronomy-mall.com|access-date=March 4, 2019}}</ref>

<ref name="tns_2007hb">{{cite web|title=Transient Name Server (TNS): SN 2007hb|url=https://wis-tns.weizmann.ac.il/object/2007hb|website=wis-tns.weizmann.ac.il|access-date=March 4, 2019}}</ref>

<ref name="tns_2016hkn">{{cite web|title=Transient Name Server (TNS): SN 2016hkn|url=https://wis-tns.weizmann.ac.il/object/2016hkn|website=wis-tns.weizmann.ac.il|access-date=March 4, 2019}}</ref>
}}

== External links ==
* {{WikiSky}}
* [http://spider.seds.org/ngc/revngcic.cgi?NGC819 SEDS]

{{Stars of Triangulum}}
{{Catalogs|PGC=8174|UGC=1632|NGC=819}}
{{Sky|02|08|34.40||29|14|03.00|190000000}}

{{DEFAULTSORT:NGC 819}}
[[Category:Spiral galaxies]]
[[Category:Triangulum]]
[[Category:NGC objects|819]]
[[Category:Principal Galaxies Catalogue objects|8174]]

{{Sourceattribution|NGC 819}}