Gravity Field, Shape, and Moment of Inertia of Titan

Details Gravity Field, Shape, and Moment of Inertia of Titan Gravity Field, Shape, and Moment of Inertia of Titan

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sci...327.1367i&link_type=abstract

Science, Volume 327, Issue 5971, pp. 1367- (2010).

Computer Science

37

Scientific paper

Precise radio tracking of the spacecraft Cassini has provided a determination of Titan’s mass and gravity harmonics to degree 3. The quadrupole field is consistent with a hydrostatically relaxed body shaped by tidal and rotational effects. The inferred moment of inertia factor is about 0.34, implying incomplete differentiation, either in the sense of imperfect separation of rock from ice or a core in which a large amount of water remains chemically bound in silicates. The equilibrium figure is a triaxial ellipsoid whose semi-axes a, b, and c differ by 410 meters (a - c) and 103 meters (b - c). The nonhydrostatic geoid height variations (up to 19 meters) are small compared to the observed topographic anomalies of hundreds of meters, suggesting a high degree of compensation appropriate to a body that has warm ice at depth.

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