3C 371

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3C 371
Hubble Legacy Archive Near-UV image of the jet coming out of 3C 371
Observation data (Epoch J2000)
Constellation Draco
Right ascension 18h 06m 50.681s[1]
Declination +69° 49′ 28.11″[1]
Redshift 0.051[1][2]
Distance 730 million light-years
224 Mpc[3]
Type BL Lac[1][2][3]
Apparent magnitude (V) 14.4[2] ±1.5[5]
Other designations
UGC 11130, PGC 61417, 2E 4023, 7C 180717.90+694858.00, QSO B1807+698[1]
See also: Quasar, List of quasars

3C 371 is a BL Lac object[1][2] located in the constellation Draco. With a redshift of 0.051,[2] this active galaxy is about 730 million light-years away.[3]

3C 371 is a well known object, first associated with the BL Lac class by Miller in 1975,[4] and is among the nearest and brightest BL Lacs.[4] Optical jet emission from 3C 371 was first detected in ground based images by Nilsson et al. in 1997, and confirmed with HST (Scarpa et al.) in 1999.[4] The implied viewing angle may be less than 18 degrees.[4] But no superluminal motion has been detected, despite frequent monitoring by the Very Long Baseline Array (VLBA).[4]

There are photos of this object dating back to 1895, and they suggest that this objects magnitude can vary by ±1.5.[5]


  1. ^ a b c d e f "3C 371". SIMBAD Astronomical Database. Retrieved 2010-04-11. 
  2. ^ a b c d e "NASA/IPAC Extragalactic Database". Results for 3C 371. Retrieved 2010-04-11. 
  3. ^ a b c "3C 371". XJET: X-Ray Emission from Extragalactic Radio Jets. 2008-01-11. Retrieved 2010-04-11. 
  4. ^ a b c d e f Perlin, Eric S.; Padgett; Georganopoulos; Sparks; Biretta; et al. (2006). "Optical Polarimetry of the Jets of Nearby Radio Galaxies. I. The Data". The Astrophysical Journal. 651 (2): 735–748. arXiv:astro-ph/0606119free to read. Bibcode:2006ApJ...651..735P. doi:10.1086/506587. 
  5. ^ a b Usher, Peter D.; Manley, Oscar P. (1968). "The Unusual Long-Term Behavior of 3c 371". Astrophysical Journal. 151: L79–L82. Bibcode:1968ApJ...151L..79U. doi:10.1086/180147. 

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