Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...235..447c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 235, no. 1-2, Aug. 1990, p. 447-458.
Astronomy and Astrophysics
Astrophysics
4
Celestial Mechanics, Librational Motion, Phobos, Mars (Planet), Nutation, Rigid Structures, Solar Orbits
Scientific paper
Semi-numerical series for Phobos' physical libration are computed by using three recent sets of Phobos' inertial parameters. The importance of second order for arguments whose frequencies are close to the free libration frequencies is emphasized. A comparison with Borderies and Yoder's solution is given. The perturbations of Phobos' orbital motion by Phobos' figure, by Deimos and by the nutation of Mars are computed. The largest of the perturbations due to Phobos' figure are terms of about 800 meters amplitude in the coordinates of Phobos, the largest terms due to Deimos are about 50 meters in amplitude and the largest terms due to the nutation of Mars are about 30 meters in amplitude. These perturbations complete the ESAPHO theory presented in a previous paper.
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