Improvement of the Orbits of Asteroids and the Mass of (1) Ceres

Details Improvement of the Orbits of Asteroids and the Mass of (1) Ceres Improvement of the Orbits of Asteroids and the Mass of (1) Ceres

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402...91v&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 91-94

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Scientific paper

We present the results of work concerning the exploitation of the observations of asteroids made by Hipparcos, in addition to ground-based observations, to determine the mass of (1) Ceres from its perturbations on the orbits of 4 asteroids. The value obtained, (4.785 +/- 0.039) 10^(-10) M_solar, is in good agreement with most recent results obtained by other authors and shows that the value of the mass of Ceres recommended by the IAU should be decreased. A second work in progress, concerning the improvement of the orbital data of all the asteroids observed by Hipparcos, is also presented. We show that the addition of the Hipparcos data to the ground-based observations leads to a high improvement of the accuracy of the orbital elements of these asteroids, mostly for the inclination and the longitude of the node.

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