NGC 991 | |
---|---|
Observation data ( J2000 epoch) | |
Constellation | Cetus |
Right ascension | 02h 35m 32.68341s [1] |
Declination | −07° 09′ 15.8406″ [1] |
Redshift | 0.005126 [2] |
Heliocentric radial velocity | 1532.8 km/s [2] |
Distance | 62.9 ± 4.5 Mly (19.28 ± 1.37 Mpc) [3] |
Apparent magnitude (B) | 12.36 [2] |
Characteristics | |
Type | SAB(rs)c [3] |
Other designations | |
MCG -01-07-023, PGC 9846 [2] |
NGC 991 is an intermediate spiral galaxy the constellation Cetus. This galaxy was discovered by astronomer William Herschel in 1785. [4] [5] [6]
A type Ib supernova designated SN 1984L was discovered in this galaxy in late August 1984 by R. Evans. [7] SN 1984L (type II, mag. 13.5), [8]
NGC 991 | |
---|---|
Observation data ( J2000 epoch) | |
Constellation | Cetus |
Right ascension | 02h 35m 32.68341s [1] |
Declination | −07° 09′ 15.8406″ [1] |
Redshift | 0.005126 [2] |
Heliocentric radial velocity | 1532.8 km/s [2] |
Distance | 62.9 ± 4.5 Mly (19.28 ± 1.37 Mpc) [3] |
Apparent magnitude (B) | 12.36 [2] |
Characteristics | |
Type | SAB(rs)c [3] |
Other designations | |
MCG -01-07-023, PGC 9846 [2] |
NGC 991 is an intermediate spiral galaxy the constellation Cetus. This galaxy was discovered by astronomer William Herschel in 1785. [4] [5] [6]
A type Ib supernova designated SN 1984L was discovered in this galaxy in late August 1984 by R. Evans. [7] SN 1984L (type II, mag. 13.5), [8]