Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978icar...33..336h&link_type=abstract
Icarus, vol. 33, Feb. 1978, p. 336-341.
Astronomy and Astrophysics
Astronomy
28
Flyby Missions, Galilean Satellites, Jupiter Probes, Planetary Structure, Astronomical Models, Callisto, Europa, Ganymede, Gravitational Fields, Harmonics, Io, Spacecraft Trajectories, Tides, Jupiter, Satellites, Orbital Observations, Spacecraft, Solar System, Evolution, Orbits, Io, Ganymede, Europa, Callisto, Rotation, Gravitational Fields, Hydrostatics, Equilibrium, Models, Tides
Scientific paper
Flyby encounters of the Galilean satellites from a Jupiter orbiter spacecraft could yield information about the second-degree gravity harmonics of these satellites. The expected values of these harmonics have been calculated for a range of plausible interior models in hydrostatic equilibrium. Because the satellites respond to comparable perturbations from rotation and tides, an independent test of hydrostatic equilibrium is feasible. For Io and Ganymede, the expected measurement accuracy from a nominal encounter should make possible an excellent discrimination from the ensemble of interior models. For Europa, a qualitative distinction between near-uniform and centrally condensed models seems feasible. Only for Callisto is the proposed experiment of marginal value.
Anderson John D.
Hubbard William B.
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