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NGC 819

From Wikipedia, the free encyclopedia

NGC 819
NGC 819 (SDSS)
Observation data (J2000.0 epoch)
ConstellationTriangulum
Right ascension02h 08m 34.40s [1]
Declination+29° 14′ 03.00″ [1]
Redshift0.021935 [1]
Heliocentric 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. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved March 4, 2019.
  2. ^ a b c "Revised NGC Data for NGC 819". spider.seds.org. Retrieved March 4, 2019.
  3. ^ "NGC 819". Retrieved March 4, 2019.
  4. ^ a b c "Data for NGC 819". www.astronomy-mall.com. Retrieved March 4, 2019.
  5. ^ a b c "Transient Name Server (TNS): SN 2007hb". wis-tns.weizmann.ac.il. Retrieved March 4, 2019.
  6. ^ a b c "Transient Name Server (TNS): SN 2016hkn". wis-tns.weizmann.ac.il. Retrieved March 4, 2019.

External links

Wikimedia Commons has media related to NGC 819.
This page was last edited on 6 June 2023, at 01:26
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