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Rotational dynamics and internal structure of Titan

✍ Scribed by Bruce G. Bills; Francis Nimmo

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
431 KB
Volume
214
Category
Article
ISSN
0019-1035

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✦ Synopsis

Estimates of the moments of inertia of Titan, as separately deduced from its gravitational field and spin pole orientation, are quite different. This discrepancy can be resolved if Titan is either not precessing as a rigid body (e.g. if the shell is decoupled from the interior by an ocean), or if the spin pole is not fully damped (e.g. due to atmospheric excitation). By the end of the Cassini mission, continued monitoring of the changing spin pole orientation, by Cassini radar observations, will determine which effect dominates.

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