Article,

Mystery of Callisto: Is it undifferentiated?

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Icarus, 130 (2): 540--543 (1997)

Abstract

The Galileo-determined moment-of-inertia factor for Callisto of 0.406 +/- 0.039 (1 sigma) is consistent with only a small amount of ice-rock differentiation (<10%), because the moment-of-inertia for a totally undifferentiated Callisto is 0.38 (not 0.40), The apparently high value for the moment-of-inertia may include nonhydrostatic contributions originating in Callisto's lithosphere., The anhydrous rock/(rock + water-ice) mass ratio for Callisto is approximate to 0.45, close to the theoretically predicted value of approximate to 0.40. (C) 1997 Academic Press.

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