Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...191..161l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 191, no. 1, Feb. 1988, p. 161-166.
Astronomy and Astrophysics
Astronomy
35
Ceres Asteroid, Orbital Elements, Planetary Mass, Solar Orbits, Planet Ephemerides, Precession, Asteroids, Ceres, Mass, Orbital Elements, Pallas, Astronomy, Orbits, Parameters, Calculations, Procedure, Perturbations, Analysis, Earth-Based Observations
Scientific paper
Improved values for the mass of Ceres and for the orbital elements of Pallas have been derived from 1577 observations and normal places of Pallas 1802 - 1987. The result for the mass of Ceres is 5.21±0.07×10-10solar masses, the true uncertainty is about ±0.3×10-10solar masses. Elements of Pallas as a basis of precise ephemerides for occultation predictions are given for several epochs. From all observational material, no significant correction of the precession constant and the motion of the equinox adopted from the FK5 system is indicated.
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