NGC 819 | |
---|---|
Observation data ( J2000.0 epoch) | |
Constellation | Triangulum |
Right ascension | 02h 08m 34.40s [1] |
Declination | +29° 14′ 03.00″ [1] |
Redshift | 0.021935 [1] |
Heliocentric radial velocity | 6576 ± 10 km/s [1] |
Distance | 302 M ly |
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 | |
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]
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]
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]