NGC 819

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]

NGC 819
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

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 magnitude about 19.5 and was located at (coordinates: RA 02h08m34.0s, DEC +29d14m14s, J2000.0).[5][1] It was classified as 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 magnitude about 17.2 and was located at (coordinates: RA 02h08m34.2s, DEC +29d14m11s, J2000.0).[6][1] It was classified as type II supernova. [6]

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See also

References
  1. "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved March 4, 2019.
  2. "Revised NGC Data for NGC 819". spider.seds.org. Retrieved March 4, 2019.
  3. "NGC 819". Retrieved March 4, 2019.
  4. "Data for NGC 819". www.astronomy-mall.com. Retrieved March 4, 2019.
  5. "Transient Name Server (TNS): SN 2007hb". wis-tns.weizmann.ac.il. Retrieved March 4, 2019.
  6. "Transient Name Server (TNS): SN 2016hkn". wis-tns.weizmann.ac.il. Retrieved March 4, 2019.


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