Henize 2-10

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Henize 2-10
Observation data (J2000 epoch)
Constellation Pyxis
Right ascension 08h 36m 15s
Declination −26° 24′ 34″
Redshift 0.002912
Helio radial velocity 873 km/s
Galactocentric velocity 657 km/s
Distance 34.24 million ly
Type dwarf
Apparent dimensions (V) 1.8 arcmin
Apparent magnitude (V) 11.09 (R Band)
References: [1]
See also: Galaxy, List of galaxies

Henize 2-10 is a dwarf galaxy located 34 million light years away in the constellation of Pyxis.[1] It is the first dwarf galaxy ever discovered that contains, at its center, a supermassive black hole.[2] This discovery was surprising since the black hole was about one quarter of the size of the black hole at the center of the Milky Way Galaxy, despite the fact that the galaxy is roughly one thousandth the size of the Milky Way. This discovery suggests that the black holes found at the center of most large galaxies may have formed before the galaxies themselves.[3]


  1. ^ a b "NED entry for HE 2-10". Retrieved 1 June 2011. 
  2. ^ Kaufman, Rachel (10 January 2011). "Huge Black Hole Found in Dwarf Galaxy". National Geographic. Retrieved 1 June 2011. 
  3. ^ Grossman, Lisa (10 January 2011). "Baby Galaxy Hosts Monster Black Hole". Wired News. Retrieved 3 July 2011.