QSO B0839+187

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QSO B0839+187
Observation data (Epoch J2000)
Right ascension 08h 42m 05.0942s
Declination+18° 35′ 40.991″
Distance8.4 billion light-years
(Light travel time)[2]
Apparent magnitude (V)16.36
Other designations
LEDA 2825583, PKS J0842+1835, PKS 0839+187, 2MASS J08420509+1835411, QSO B0839+1846
See also: Quasar, List of quasars

QSO B0839+187 (PKS 0839+187) is a quasar[1] that was used to measure the speed of gravity in VLBI experiment conducted by Edward Fomalont and Sergei Kopeikin in September 2002.


  1. ^ a b Simbad
  2. ^ a b "NASA/IPAC Extragalactic Database". Results for 0839+1846. Retrieved 2010-04-20.

Coordinates: Sky map 08h 42m 05.0942s, +18° 35′ 40.991″