| NGC 6166 | |
|---|---|
 NGC 6166 bySpitzer Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Hercules |
| Right ascension | 16h 28m 38.276s |
| Declination | +39° 33′ 04.97″ |
| Redshift | z = −0.030354 (minus sign indicatesblueshift) |
| Heliocentric radial velocity | −9100 km/s |
| Distance | 490Mly (142Mpc) |
| Apparent magnitude (V) | 12.78[1] |
| Absolute magnitude (V) | −24.1 |
| Characteristics | |
| Type | cD2 pec. |
| Apparent size (V) | 1.9’ x 1.4’ |
| Other designations | |
| UGC 10409,PGC 58265, CGCG 2205.6+3107 0504,MCG +07-34-060,3C 338 | |
NGC 6166 is anelliptical galaxy in theAbell 2199 cluster. It lies 490 million light years away in the constellationHercules. The primary galaxy in the cluster, it is one of the most luminous galaxies known in terms ofX-ray emissions.[2]
NGC 6166 is a supermassive, typecD galaxy, with several smaller galaxies within its envelope.[3]
Suspected to have formed through a number of galaxy collisions, NGC 6166 has a large number ofglobular clusters (estimated as between 6,200 and 22,000 in 1996)[2] orbiting the galaxy.[4] A 2016 study, however, gave an even higher number (around 39,000) suggesting also that the halo of this galaxy blends smoothly with the intra-cluster medium.[5]Because of that, the galaxy has the richest globular cluster system known.The galaxy harbors a supermassiveblack hole at its center with a mass of nearly 30 billionM☉ based on dynamical modelling.[6]
NGC 6166 is known to host anactive nucleus, classified as an FR Isource, which powers two symmetric parsec-scale radio jets and radio lobes. These are caused by the infall of gas into its center due to acooling flow that deposits 200solar masses of gas every year there.[7]
It has been proposed that a number ofO-type stars may be present in the center of NGC 6166.[8][9]
Twosupernovae have been observed in NGC 6166:
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Media related toNGC 6166 at Wikimedia Commons| Stars |
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 | Thiselliptical galaxy article is astub. You can help Wikipedia byadding missing information. |
