3C 171

3C 171 is a Seyfert galaxy located in the constellation Lynx, classfied as a radio galaxy, containing an extended emission-line region.^[3][4] It is also a relatively isolated galaxy, not belonging to any other rich galaxy clusters.^[5]

3C 171
3C 171 by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation	Lynx
Right ascension	06h 55m 14.7s[1]
Declination	+54° 08′ 89″[1]
Redshift	0.238400[2]
Distance	930 megaparsecs (3.0×109 ly) h−1 0.73[2]
Apparent magnitude (V)	19.08[1]
Characteristics
Type	Sy2, Rad, AGN, QSO, G[1] G, FR II, Sy 2[2]
Other designations
LEDA 2817570, 3C 171, 4C +54.11, QSO B0651+542

The inner regions of 3C 171 is said to be similar to an ordinary Fanaroff-Riley Class 2, but instead of radio lobes, it contains low-surface brightness plumes.^[4] Using the multi-radio-frequency study, the plumes of 3C 171 are shown to flow in a reverse direction from both the primary and secondary hotspots, found separated. In one of the plumes located north-west, the region shows enhanced brightness, making it a quasi-hotspot.^[6] Further evidence also points the emission lines in 3C 171 are made up of plasma, hinting the gas might be cooling.^[7]

See also

• Lists of galaxies