3C 66B

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3C 66B
Hubble Legacy Archive visible light image of 3C 66B
Observation data (J2000 epoch)
Constellation Andromeda
Right ascension 02h 23m 11.4112s[1]
Declination +42° 59′ 31.385″[1]
Redshift 0.021258[1]
Distance 300 million light-years
92 Mpc[2]
Apparent magnitude (V) 15.0 (B)
Type FRI RG[2]
gamma-ray source[3]
Apparent size (V) 2.4´X1.82´
Other designations

UGC 1841, LEDA 9067, 3C 66, 4C 42.07,

PGC 9067, QSO B0220+427,[4] MAGIC J0223+430[3]
See also: Galaxy, List of galaxies

3C 66B is an elliptical Fanaroff and Riley class 1 radio galaxy[2] located in the constellation Andromeda. With an estimated redshift of 0.021258,[1] the galaxy is about 300 million light-years away.[2]

The orbital motion of 3C 66B showed supposed evidence for a supermassive black hole binary (SMBHB) with a period of 1.05 ± 0.03 years,[5] but this claim was later proven wrong (at 95% certainty).[6]

Messier 87 (M87), about 55 million light years away, is the largest giant elliptical galaxy near the Earth, and also contains an active galactic nucleus. The smooth jet of 3C 66B rivals that of M87.[7]

Hubble Legacy Archive Near-UV image of the jet coming out of 3C 66B.


  1. ^ a b c d "NASA/IPAC Extragalactic Database". Results for PGC 9067. Retrieved 2006-10-26. 
  2. ^ a b c d "3C 66B". XJET: X-Ray Emission from Extragalactic Radio Jets. 2009-04-16. Retrieved 2010-04-05. 
  3. ^ a b Errando, Manel; Lindfors; Prandini; Tavecchio. "A TeV source in the 3C 66A/B region". arXiv:0907.0994Freely accessible. 
  4. ^ SIMBAD
  5. ^ Sudou, H.; Iguchi, S.; Murata, Y.; Taniguchi, Y. (2003). "Orbital Motion in the Radio Galaxy 3C 66B: Evidence for a Supermassive Black Hole Binary". Science. 300 (5623): 1263–1265. arXiv:astro-ph/0306103Freely accessible. Bibcode:2003Sci...300.1263S. doi:10.1126/science.1082817. PMID 12764190. Retrieved 2010-11-12. 
  6. ^ Jenet, F.; Lommen, A.; Larson, S. L.; Wen, L. (2004). "Constraining the Properties of Supermassive Black Hole Systems Using Pulsar Timing: Application to 3C 66B". The Astrophysical Journal. 606 (2): 799–803. arXiv:astro-ph/0310276Freely accessible. Bibcode:2004ApJ...606..799J. doi:10.1086/383020. Retrieved 2010-11-12. 
  7. ^ 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/0606119Freely accessible. Bibcode:2006ApJ...651..735P. doi:10.1086/506587. 

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