Astronomy:NGC 819
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| NGC 819 | |
|---|---|
 NGC 819 (SDSS) | |
| Observation data (J2000.0 epoch) | |
| Constellation | Triangulum |
| Right ascension | 02h 08m 34.40s [1] |
| Declination | +29° 14′ 03.00″ [1] |
| Redshift | 0.021935 [1] |
| Helio radial velocity | 6576 ± 10 km/s [1] |
| Distance | 302 Mly |
| Apparent magnitude (V) | 13.40 [2] |
| Apparent magnitude (B) | 14.30 [2] |
| Characteristics | |
| Type | S? [1] |
| Apparent size (V) | 0.6 x 0.4 [2] |
| Other designations | |
| IRAS 02056+2859, UGC 1632, PGC 8174 | |
NGC 819 is a spiral galaxy approximately 302 million light-years away from Earth in the constellation of Triangulum.[1][3] It forms a visual pair with the galaxy NGC 816 (fr) 5.7' WNW.[4]
Discovery
NGC 819 was discovered by German astronomer Heinrich Louis d'Arrest on September 20, 1865 with the 11-inch refractor at Copenhagen.[4] Édouard Stephan independently found the galaxy again on September 15, 1871 with the 31" reflector at Marseille Observatory.[4]
Supernovae
Four supernovae have been observed in NGC 819:
- SN 2007hb (Type Ib/c, mag. 19.5) was discovered by Nearby Supernova Factory on August 24, 2007.[5][6] It was located at RA 02h 08m 34.0s, DEC +29° 14′ 14″, J2000.0.[6][1]
- SN 2016hkn (Type II, mag. 17.2) was discovered by Paolo Campaner on October 22, 2016.[7] It was located at RA 02h 08m 34.23s, DEC +29° 14′ 11.1″.[7][1]
- SN 2020mbe (Type Ic, mag. 18.6) was discovered by Gaia Photometric Science Alerts on January 10, 2020.[8]
- SN 2026fau (Type II, mag. 18.5942) was discovered by the Zwicky Transient Facility on March 7, 2026.[9]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NASA/IPAC Extragalactic Database". http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+819.
- ↑ 2.0 2.1 2.2 "Revised NGC Data for NGC 819". http://spider.seds.org/ngc/revngcic.cgi?NGC819.
- ↑ "NGC 819". http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%20819.
- ↑ 4.0 4.1 4.2 "Data for NGC 819". http://www.astronomy-mall.com/Adventures.In.Deep.Space/NGC%201%20-%20999%20(11-30-17).htm.
- ↑ Rigaudier, G.; Pecontal, E.; Buton, C.; Copin, Y.; Gangler, E.; Smadja, G.; Tao, C.; Antilogus, P. et al. (2007). "Supernovae 2007gx, 2007gy, 2007gz, 2007ha, 2007hb, 2007hc". Central Bureau Electronic Telegrams (1043): 1. Bibcode: 2007CBET.1043....1R. http://www.cbat.eps.harvard.edu/cbet/001000/CBET001043.txt.
- ↑ 6.0 6.1 "SN 2007hb". IAU. https://www.wis-tns.org/object/2007hb.
- ↑ 7.0 7.1 "SN 2016hkn". IAU. https://www.wis-tns.org/object/2016hkn.
- ↑ "SN 2020mbe". IAU. https://www.wis-tns.org/object/2020mbe.
- ↑ "SN 2026fau". IAU. https://www.wis-tns.org/object/2026fau.
External links
- NGC 819 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
Coordinates: 
02h 08m 34.40s, 29° 14′ 03.00″
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