Key facts
- Constellation
- Indus
- Right ascension
- 21 04 02.2
- Declination
- −49 ° 06 ′ 51 ″
- Heliocentric radial velocity
- 7580 km/s
- Distance
- 330 Mly (101 Mpc )
- Absolute magnitude b
- -21.87 ± 0.09
- Type
- (R')SAB0/a?(s)
- Size
- ~139,500 ly (42.78 kpc ) (estimated)
- Apparent size v
- 1.31× 0.44
via Wikipedia infobox
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Encyclopedic overview
NGC 7004 is a lenticular galaxy and a type 2 Seyfert galaxy around 330 million light-years away from Earth in the constellation Indus. NGC 7004 has an estimated diameter of 140,000 light-years. NGC 7004 was discovered by astronomer John Herschel on October 2, 1834. NGC 7004 is a member of a group of galaxies known as [T2015] nest 200093. The group contains 12 member galaxies including NGC 7002, has a velocity dispersion of 440 km/s and an estimated mass of 1.28 × 10 M☉. NGC 7004 is also host to a supermassive black hole with an estimated mass of 8.1 × 10 M☉.
See also
Excerpted from Wikipedia’s “NGC 7004” article, available under the CC BY-SA 4.0 licence.