Astronomy:3C 66B

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Short description: Elliptical radio galaxy in the constellation Andromeda
3C 66B
Hubble Legacy Archive visible light image of 3C 66B
Observation data (J2000 epoch)
Right ascension 02h 23m 11.4112s[1]
Declination+42° 59′ 31.385″[1]
Distance300 Mly (92 Mpc)[2]
Apparent magnitude (V)15.0 (B)
TypeFRI RG[2]
gamma-ray source[3]
Apparent size (V)2.4´X1.82´
Other designations
3C 66, 4C 42.07, QSO B0220+427[4], MAGIC J0223+430, UGC 1841, PGC 9067[3]

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]

3C 66B is an outlying member of Abell 347 which is part of the Perseus–Pisces Supercluster.[8]

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


  1. 1.0 1.1 1.2 1.3 "NASA/IPAC Extragalactic Database". Results for PGC 9067. 
  2. 2.0 2.1 2.2 2.3 "3C 66B". XJET: X-Ray Emission from Extragalactic Radio Jets. 2009-04-16. 
  3. 3.0 3.1 Errando, Manel; Lindfors; Prandini; Tavecchio (2009). "A TeV source in the 3C 66A/B region". arXiv:0907.0994 [astro-ph.HE].
  4. "UGC 1841 -- Seyfert 1 Galaxy". 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. doi:10.1126/science.1082817. PMID 12764190. Bibcode2003Sci...300.1263S. 
  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. doi:10.1086/383020. Bibcode2004ApJ...606..799J. 
  7. Perlin, Eric S. et al. (2006). "Optical Polarimetry of the Jets of Nearby Radio Galaxies. I. The Data". The Astrophysical Journal 651 (2): 735–748. doi:10.1086/506587. Bibcode2006ApJ...651..735P. 
  8. Fanti, C.; Fanti, R.; Feretti, L.; Ficarra, A.; Gioia, I. M.; Giovannini, G.; Gregorini, L.; Mantovani, F. et al. (1982-01-01). "Radio and optical observations of 9 nearby Abell clusters - A262, A347, A569, A576, A779, A1213, A1228, A2162, A2666". Astronomy and Astrophysics 105: 200–218. ISSN 0004-6361. Bibcode1982A&A...105..200F. 

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