Equipotential Surface and normal gravity of the Galilean satellites

Details Equipotential Surface and normal gravity of the Galilean satellites Equipotential Surface and normal gravity of the Galilean satellites

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002acasn..43..197z&link_type=abstract

Acta Astronomica Sinica, vol.43, no.2, p. 197-204

Astronomy and Astrophysics

Astronomy

Celestial Meclianics: Satellites, Normal Gravity Field

Scientific paper

In this article, expanded equations of normal gravity on the equipotential surface is proposed for a natural orbit synchronous satellite whose orbital plane is close to its equatorial plane. Tidal effects on the normal gravity are also discussed. The authors apply these to the Galilean satellites. Calculations suggests that tides raised by Jupiter weakly affect the Galilean satellites. The radial displacements of the gravity due to tides raised by Jupiter are in the range between 10-3 ms-2 and 10-5 ms-2, which are similar to the latitudinal and longitudinal displacements.Especially, the variations along the latitude circle are larger than those along the longitude circle. It can be concluded from estimates that tidal effects on most of the Galilean satellites are larger than that on the Moon.

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