Astronomy:NGC 819

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Short description: Galaxy in the constellation Triangulum
NGC 819
NGC819 - SDSS DR14.jpg
NGC 819 (SDSS)
Observation data (J2000.0 epoch)
ConstellationTriangulum
Right ascension 02h 08m 34.40s [1]
Declination+29° 14′ 03.00″ [1]
Redshift0.021935 [1]
Helio radial velocity6576 ± 10 km/s [1]
Distance302 Mly
Apparent magnitude (V)13.40 [2]
Apparent magnitude (B)14.30 [2]
Characteristics
TypeS? [1]
Apparent size (V)0.6 x 0.4 [2]
Other designations
PGC 8174, UGC 1632

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 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

Supernova SN 2007hb was discovered in NGC 819 on August 24, 2007 by Nearby Supernova Factory.[5] SN 2007hb had a magnitude of about 19.5 and was located at RA 02h08m34.0s, DEC +29d14m14s, J2000.0.[5][1] It was classified as a type SN Ib/c supernova.[5]

Supernova SN 2016hkn was discovered in NGC 819 on October 22, 2016 by Fabio Briganti.[6] SN 2014bu had a magnitude of about 17.2 and was located at RA 02h08m34.2s, DEC +29d14m11s, J2000.0.[6][1] It was classified as a type II supernova.[6]

NGC 819 (SDSS)

See also

References

  1. ↑ 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. ↑ 2.0 2.1 2.2 "Revised NGC Data for NGC 819". http://spider.seds.org/ngc/revngcic.cgi?NGC819. 
  3. ↑ "NGC 819". http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%20819. 
  4. ↑ 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. 
  5. ↑ 5.0 5.1 5.2 "Transient Name Server (TNS): SN 2007hb". https://wis-tns.weizmann.ac.il/object/2007hb. 
  6. ↑ 6.0 6.1 6.2 "Transient Name Server (TNS): SN 2016hkn". https://wis-tns.weizmann.ac.il/object/2016hkn. 

External links

Coordinates: Sky map 02h 08m 34.40s, 29° 14′ 03.00″



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