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 | |
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 one-sided radio jet—one of the brightest known—discovered in 1977.[4]
References
- 1 2 3 4 "NASA/IPAC Extragalactic Database". Results for NGC 6251. Retrieved 2006-10-26.
- ↑ "Distance and Length". Online-Unit-Converter.com. Retrieved 2010-03-29.
- 1 2 3 SIMBAD
- ↑ Perley, R. A.; Bridle, A. H.; Willis, A. G. (1984). "High-resolution VLA Observations of the Radio Jet in NGC 6251". Astrophysical Journal Supplement Series 54: 291–334. Bibcode:1984ApJS...54..291P. doi:10.1086/190931.
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)
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