Citation
Abstract
The positions of Venus, Mars, and Jupiter have been obtained in the VLBI radio reference frame by measuring the position of a satellite (natural or artificial) of each planet relative to an extragalactic source in the radio catalogue, From the results for Mars and Venus we conclude that the offset in right ascension of the radio frame from the dynamical equinox defined in DE200 is 000 +0''04. The observations for Jupiter imply a correction to its position from DE200 of -0''18 +01'04 in right ascension and ~0''06 +0"'05 in declination on 1983 April 29. The right ascension of Jupiter relative to the inner planets has been measured independently using Doppler tracking data near Jupiter encounter from Pioneers 10 and 11 and from Voyagers I and 2 by tying the tracking station positions, through previous spacecraft missions, to the DE200 ephemerides of the inner planets. This technique yielded a correction to Jupiter’s right ascension of -0''22 01/05, in good agreement with the results from the direct radio measurements.
Details
- Volume
- 42-81
- Published
- May 15, 1985
- Pages
- 1–8
- File Size
- 616.9 KB