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Q0906+6930 or QSO J0906+6930
Observation data (Epoch J2000)
ConstellationUrsa Major
Right ascension 09h 06m 30.75s[1]
Declination+69° 30′ 30.8″[1]
Distance12.3 billion light-years
(Light travel time)[2]
Other designations
QSO B0901+6942, CLASS B0901+697, GB6 J0906+6930, QSO J0906+6930, BWE 0901+6942, GB6 B0901+6942, 87GB 090153.2+694215.
See also: Quasar, List of quasars

Q0906+6930 is the most distant known blazar[1] (redshift 5.47 / 12.2 billion light years),[2] discovered in July, 2004. The engine of the blazar is a supermassive black hole (SMBH) approximately 2 billion times the mass of the Sun[3] (the mass of the Milky Way Galaxy is around 1.5 trillion solar masses). The event horizon volume is on the order of 1,000 times that of the Solar System. It is one of the most massive black holes on record.

Distance measurements[edit]

The "distance" of a far away galaxy depends on what distance measurement you use. With a redshift of 5.47,[1][2] light from this active galaxy is estimated to have taken around 12.3 billion light-years to reach us.[2] But since this galaxy is receding from Earth at an estimated rate of 285,803 km/s[1] (the speed of light is 299,792 km/s), the present (co-moving) distance to this galaxy is estimated to be around 26 billion light-years (7961 Mpc).[2]


  • Epoch 2000.0
    • RA: 09h 06m 30.8s
    • Dec: +69° 30' 31"
  • Classification: FSRQ
  • Redshift (z) = 5.47
  • R = 19.9
  • Power (BL Lac) = 1.4-3.5

External links[edit]


  1. ^ a b c d e f g Simbad
  2. ^ a b c d e f "NASA/IPAC Extragalactic Database". Results for 0901+6942. Retrieved 2010-04-20.
  3. ^ a b Romani, Roger W. (2006). "The Spectral Energy Distribution of the High-z Blazar Q0906+6930". The Astronomical Journal. 132 (5): 1959–1963. arXiv:astro-ph/0607581. Bibcode:2006AJ....132.1959R. doi:10.1086/508216.