Models, figures, and gravitational moments of the Galilean satellites of Jupiter and icy satellites of Saturn

Details Models, figures, and gravitational moments of the Galilean satellites of Jupiter and icy satellites of Saturn Models, figures, and gravitational moments of the Galilean satellites of Jupiter and icy satellites of Saturn

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...61...92z&link_type=abstract

Icarus (ISSN 0019-1035), vol. 61, Jan. 1985, p. 92-100.

Astronomy and Astrophysics

Astronomy

36

Galilean Satellites, Gas Giant Planets, Icy Satellites, Planetary Gravitation, Planetology, Saturn Satellites, Astronomical Models, Geodesy, Gravitational Effects, Tables (Data), Jupiter, Satellites, Models, Gravity Properties, Gravity Moments, Icy Bodies, Saturn, Gravity Fields, Parameters, Titan, Calculations, Differentiation, Ganymede, Observations, Io, Mimas, Enceladus

Scientific paper

A general theory for the figures of satellites in synchronous rotation in the gravitational fields of a planet is developed, in order to derive a first order approximation. Love numbers, figure parameters, and gravitational moments are calculated for two-layer and three-layer models of the Galilean satellites, Titan, and the icy satellites of Saturn and the calculations are compared with available observational data. It is shown that the differences between equatorial semiaxes for Io and Mimas appear to be exaggerated. For Encaladus, the observed semiaxial values are in satisfactory agreement with the theoretical calculations. It is pointed out that in order to discriminate between different Encaladus trial models, it may be necessary to determine the figure parameters more precisely.

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