About relativistic close approaches between Jupiter and quasars in the perspective of the GAIA mission

Details About relativistic close approaches between Jupiter and quasars in the perspective of the GAIA mission About relativistic close approaches between Jupiter and quasars in the perspective of the GAIA mission

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf...63s&link_type=abstract

SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.

Astronomy and Astrophysics

Astrophysics

Scientific paper

The recent improvements of ground and space observational techniques as well as the launch of specific space missions as Hipparcos has considerably increased the precisions of astrometric measurements. One of the most important goal still remaining to be done is the link between primary catalog ICRF (International Celestial Reference Frame) and the dynamical reference frame determined through the time coordinates and the trajectories of moving celestial bodies, as the Moon, the Sun and the planets. This link can be done through the close encounters between a planet (here Jupiter) and quasars. We focus preferentially on the period involving the future space mission GAIA, and also determine the corrections due to the relativistic deflection of light of the quasars around Jupiter. After defining the (α, δ) parallax effects between an Earth ground-based observational site and GAIA, we found a large number of close encounters. Then in order to understand the typical configurations of the close encounters above, we have selected examples involving the relativistic deflection of light as seen from the two observational sites (the Earth and GAIA). We conclude that these events deserve a great attention in the future in particular in the scope of a link between the dynamical reference system and the ICRF.

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