Other
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999baas...31.1589f&link_type=abstract
American Astronomical Society, DPS Meeting #31, late abstracts, #59.32; Bulletin of the American Astronomical Society, Vol. 31,
Other
1
Scientific paper
In this work, we have begun the first adjustement of the analytical theories of the planets built at the IMC-BDL, VSOP.We had gather together several types of observations, reduce and homogenize them. There are very different types of data: old and recent transit observations spread on a period of more than 2 centuries (1750-1997), photographic and CCD observations, radar ranging data and positions of planets deduced from tracking observations of space probe by the use of the VLBI techniques. We also used positions of outer planets deduced from satellites absolute positions. We have treated an important number of data limiting our first study to the planets Mercury, Venus, Jupiter and Saturn. From the first fit made on Mercury and Venus observations, we have deduced a new link between the inertiel dynamical reference frame of VSOP and the inertiel cinematic reference frame of the ICRS. We choosed to test the quality of the new solution of motion of the Earth-Moon barycenter by including this solution in the fitted orbit of the outer planets.We made a second fit based on observations of Jupiter and Saturn, computed in the reference frame deduced from the fit on Mercury and Venus observations. We increased the accuracy of a factor 2 on the positions of Jupiter when we compared positions deduced from the fitted solution and observed positions (made at La Palma in 1983-1993) which are not inclued in the fit. Finally, we made one of the first wavelet analysis on non-regularly sampled time series (see other presentation).
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