Io's gravity field and interior structure

Details Io's gravity field and interior structure Io's gravity field and interior structure

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10632963a&link_type=abstract

Journal of Geophysical Research, Volume 106, Issue E12, p. 32963-32970

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Planetology: Comets And Small Bodies: Atmospheres-Evolution

Scientific paper

Radio Doppler data generated by the Deep Space Network (DSN) from four encounters of the Galileo spacecraft with Io, Jupiter's innermost Galilean satellite, are used to infer Io's gravitational quadrupole moments. By combining the four flybys into a single solution for the gravity field, the response of Io to the second degree tidal and rotational potentials is accurately determined. This is characterized by the value of the second degree potential Love number k2=1.2924+/-0.0027. We construct interior models that satisfy constraints imposed by the mean radius R=1821.6+/-0.5km, the mean density ρ=3527.8+/-2.9kg/m3, and the normalized axial moment of inertia C/MR2=0.37685+/-0.00035. The gravitationally derived figure of Io has principal axes (c

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