NGC 2642

NGC 2642
The barred spiral galaxy NGC 2642.
Observation data (J2000 epoch)
Constellation	Hydra
Right ascension	08h 44m 37.0s[1]
Declination	−04° 07′ 18.2″[1]
Redshift	0.014473 [1]
Heliocentric radial velocity	4339 ± 5 km/s[1]
Distance	222.8 ± 15.6 Mly (68.32 ± 4.79 Mpc)[1]
Apparent magnitude (V)	12.6[1]
Characteristics
Type	SB(r)bc[1]
Size	~140,800 ly (43.17 kpc) (estimated)[1]
Apparent size (V)	2.0' x 1.8'[1]
Other designations
IRAS 08382-0356, 2MASX J08404435-0407182, MCG -01-22-033, PGC 24395[1]

NGC 2642 is a barred spiral galaxy in the constellation of Hydra. Its velocity with respect to the cosmic microwave background is 4632 ± 21 km/s, which corresponds to a Hubble distance of 68.32 ± 4.79 Mpc (∼223 million light-years).^[1] It was discovered by British astronomer John Herschel on 19 February 1830.^[2]

According to the SIMBAD database, NGC 2642 is a Seyfert I galaxy, i.e. it has a quasar-like nuclei with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.^[3]

Three supernovae have been observed in NGC 2642: SN 2002fj (type IIn, mag. 15.8),^[4] SN 2008bh (type II, mag. 16.3),^[5] and SN 2023aaby (type Ic, mag. 17.9).^[6]

• List of NGC objects (2001–3000)

• Media related to NGC 2642 at Wikimedia Commons
• NGC 2642 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images