NGC 6251

NGC 6251
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 a Seyfert galaxy^[3] located in the constellation Ursa Minor. This galaxy may have an association with gamma-ray source 3EG J1621+8203.^[3] This is a radio galaxy, with a linear extent of 3.0 Mpc. It was the largest such known in 1978.^[4]

References

1. ^ ^{a b c d} "NASA/IPAC Extragalactic Database". Results for NGC 6251. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC++6251&extend=no. Retrieved 2006-10-26. 
2. ^ "Distance and Length". Online-Unit-Converter.com. http://www.online-unit-converter.com/distance-and-length/. Retrieved 2010-03-29. 
3. ^ ^{a b c} SIMBAD
4. ^ New Scientist, "Largest radio galaxy is well organised mechanically", 29 June 1978

External links

• www.jb.man.ac.uk/atlas/
• Wikisky image of NGC 6251
• Hubble Finds a Bare Black Hole Pouring Out Light (Probing the heart of the active galaxy NGC 6251 -- September 10, 1997)