NGC 7004

NGC 7004 is a lenticular galaxy^[1] and a type 2 Seyfert galaxy^[2] around 330 million light-years away from Earth in the constellation Indus.^[3][1] NGC 7004 has an estimated diameter of 140,000 light-years.^[1] NGC 7004 was discovered by astronomer John Herschel on October 2, 1834.^[4] NGC 7004 is a member of a group of galaxies^[5] known as [T2015] nest 200093.^[6] The group contains 12 member galaxies including NGC 7002, has a velocity dispersion of 440 km/s and an estimated mass of 1.28 × 10¹⁴ M_☉.^[5] NGC 7004 is also host to a supermassive black hole with an estimated mass of 8.1 × 10⁸ M_☉.^[7]

NGC 7004
NGC 7004 (bottom) and NGC 7002 (top) with legacy survey
Observation data (J2000 epoch)
Constellation	Indus
Right ascension	21h 04m 02.2s[1]
Declination	−49° 06′ 51″[1]
Redshift	0.025284
Heliocentric radial velocity	7580 km/s[1]
Distance	330 Mly (101 Mpc)[1]
Apparent magnitude (V)	13.8[1]
Absolute magnitude (B)	-21.87 ± 0.09 [1]
Characteristics
Type	(R')SAB0/a?(s)[1]
Size	~139,500 ly (42.78 kpc) (estimated)
Apparent size (V)	1.31× 0.44[1]
Other designations
ESO 235-46, FAIR 938, PGC 66019[1]

See also

• NGC 6861
• NGC 2787
• List of NGC objects (7001–7840)