NGC 4331

NGC 4331 is an irregular galaxy located 74 million light-years away^[2] in the constellation Draco. The galaxy was discovered by astronomer William Herschel on December 12, 1797.^[3] The galaxy is host to a black hole with an estimated mass of 4.6×10⁵ solar masses.^[4]

NGC 4331
Image of NGC 4331 by PanSTARRS.
Observation data (J2000 epoch)
Constellation	Draco
Right ascension	12h 22m 35.9s[1]
Declination	76° 10′ 21″[1]
Redshift	0.005234[1]
Heliocentric radial velocity	1569 km/s[1]
Distance	73.8 Mly (22.63 Mpc)[1]
Group or cluster	NGC 4291 Group
Apparent magnitude (V)	14.64[1]
Characteristics
Type	Im?[1]
Size	~48,100 ly (14.74 kpc) (estimated)[1]
Apparent size (V)	2.2 x 0.4[1]
Other designations
UGC 07449, PGC 040085, MCG +13-09-026, VII Zw 451[1]

NGC 4331 is a member of the NGC 4291 Group, which also contains the active galaxy NGC 4319^[5][6][7][8] and is an X-ray bright member of the group.^[9] The NGC 4291 Group is located within the Canes Venatici-Camelopardalis Cloud,^[5] which lies in the First Upper Plane of the Virgo Supercluster.^[6]

See also

• List of NGC objects (4001–5000)