Abstract
We have determined the relativistic light deflection of the quasar J0842+1835 as Jupiter passed within 37 on 2002 September 8, by measuring the time delay using the Very Long Baseline Array (VLBA) and Effelsberg radio telescopes at 8.4 GHz. At closest approach, general relativity (GR) predicts a radial (static) deflection of 1190 μas and a tangential (retarded) deflection in the direction of Jupiter's motion of 51 μas. Our experiment achieved an rms position error of ≤10 μas and measured this retarded deflection to be 0.98 ± 0.19 (rms error) times that predicted by GR. The increased positional accuracy for this VLBI phase-referencing experiment was achieved by using two calibrator sources. Comments on the interpretation of this experiment are given.
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