Based on radio tracking of the Cassini spacecraft, we present a preliminary estimate of the gravity field of Saturn's mid-sized icy moon Dione. Combining this [1–5] with a shape model based on limb profile analyses [6,7], we conclude that Dione is differentiated, with a preferred moment of inertia of ~0.33MR^2, and that its ~300 meters of non-hydrostatic degree-2 topography may be isostatically compensated, consistent with the presence of an internal ocean.
Dione's Internal Structure Inferred from Cassini Gravity and Topography
ZANNONI, MARCO;TORTORA, PAOLO;
2016
Abstract
Based on radio tracking of the Cassini spacecraft, we present a preliminary estimate of the gravity field of Saturn's mid-sized icy moon Dione. Combining this [1–5] with a shape model based on limb profile analyses [6,7], we conclude that Dione is differentiated, with a preferred moment of inertia of ~0.33MR^2, and that its ~300 meters of non-hydrostatic degree-2 topography may be isostatically compensated, consistent with the presence of an internal ocean.File in questo prodotto:
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