Check on JPL DExxx using HIPPARCOS and TYCHO Observations

Details Check on JPL DExxx using HIPPARCOS and TYCHO Observations Check on JPL DExxx using HIPPARCOS and TYCHO Observations

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..149m&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 149-152

Computer Science

3

Scientific paper

Obervations of the positions of Europa (J2) and Titan (S6) by Hipparcos, and Ganymede (J3) and Callisto (J4) by Tycho are analysed to give checks on the latest JPL ephemerides of the planets Jupiter and Saturn. The observed positions of the satellites are compared with DExxx using the G5 theory of the Galilean satellites and D.B. Taylor's theory of Titan to calculate their offsets from the barycentres of the two systems. The Hipparcos observations of J2, and Tycho of J3 and J4 put tight constraints on the orbit of Jupiter, and agree closely with the series of ground-based observations made by the Carlsberg Meridian Telescope.

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