08h42m05.0942s, +18° 35′ 40.991″| QSO B0839+187 | |
|---|---|
| Observation data (Epoch J2000) | |
| Constellation | Cancer |
| Right ascension | 08h42m 05.0942s |
| Declination | +18° 35′ 40.991″ |
| Redshift | 1.27[1][2] |
| Distance | 8.4 billion light-years (Light travel time)[2] |
| Type | Rad |
| 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 for a VLBI experiment conducted by Edward Fomalont and Sergei Kopeikin in September 2002. They claimed to measure the speed of gravity, but this is disputed.[3][4][5]
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