Astronomy:QSO B0839+187

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Short description: Quasar in the constellation Cancer
QSO B0839+187
Observation data (Epoch J2000)
ConstellationCancer
Right ascension 08h 42m 05.0942s
Declination+18° 35′ 40.991″
Redshift1.27[1][2]
Distance8.4 billion light-years
(Light travel time)[2]
TypeRad
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]

References

  1. ↑ 1.0 1.1 Simbad
  2. ↑ 2.0 2.1 "NASA/IPAC Extragalactic Database". Results for 0839+1846. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=0839%2B1846&extend=no. 
  3. ↑ Fomalont, Ed; Kopeikin, Sergei (2003). "The measurement of the light deflection from Jupiter: Experimental results". The Astrophysical Journal 598 (1): 704–711. doi:10.1086/378785. Bibcode: 2003ApJ...598..704F. 
  4. ↑ Asada, Hideki (2002). "Light cone effect and the Shapiro time delay". The Astrophysical Journal Letters 574 (1): L69–L70. doi:10.1086/342369. Bibcode: 2002ApJ...574L..69A. 
  5. ↑ Stuart Samuel (2003). "On the Speed of Gravity and the v/c Corrections to the Shapiro Time Delay". Physical Review Letters 90 (23): 231101. doi:10.1103/PhysRevLett.90.231101. PMID 12857246. Bibcode: 2003PhRvL..90w1101S. 

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




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