NGC 6251

From Wikipedia, the free encyclopedia
Jump to: navigation, search
NGC 6251
NGC 6251HST.jpg
Hubble image of the heart of the active galaxy NGC 6251
Observation data (J2000 epoch)
Constellation Ursa Minor
Right ascension 16h 32m 31.9700s[1]
Declination +82° 32′ 16.400″[1]
Redshift 0.02471[1]
Distance 340 million light-years[2]
Type E[1]
Apparent dimensions (V) 1.82´X1.55´
Apparent magnitude (V) 14.3[3]
Other designations
NGC 6251, UGC 10501, LEDA 58472, 6C 1636+8239, QSO B1637+826
See also: Galaxy, List of galaxies

NGC 6251 is an active supergiant elliptical radio galaxy in the constellation Ursa Minor, and is more than 340 million light-years away from Earth. The galaxy has a Seyfert 2 active galactic nucleus,[3] and is one of the most extreme examples of a Seyfert galaxy. This galaxy may be associated with gamma-ray source 3EG J1621+8203, which has high-energy gamma-ray emission.[3] It is also noted for its radio lobe.

References[edit]

  1. ^ a b c d "NASA/IPAC Extragalactic Database". Results for NGC 6251. Retrieved 2006-10-26. 
  2. ^ "Distance and Length". Online-Unit-Converter.com. Retrieved 2010-03-29. 
  3. ^ a b c SIMBAD

External links[edit]