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Dynamics of the Mimas-Tethys System

Published online by Cambridge University Press:  12 April 2016

Sylvain Champenois
Sylvain Champenois*
Affiliation:
Laboratoire d’Astronomie, 1 Impasse de l’Observatoire, 59000 LILLE, E-mail:[email protected]

Abstract

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The role of the 200 yr-long period found recently in the mean longitude of Mimas (Vienne and Duriez 1992) is investigated through numerical integrations. It is shown that it has a deciding effect on the descriptions of the resonance motion of the Mimas-Tethys system, as considered up to now. As a result, Mimas’s inclination before capture may have been higher (up to 0.7°) or lower (down to 0.03°) than the value previously considered (0.42°). Also, Tethys’s eccentricity on capture may have been quite higher (≈ 0.008 versus 0). Moreover, the probability of capture is found to be very sensitive to Tethys’s eccentricity, and possibly much higher (up to 1) than the value considered before (0.04).

Type
Extended Abstracts
Information
International Astronomical Union Colloquium , Volume 172: Impact of Modern Dynamics in Astronomy , 1999 , pp. 419 - 424
Copyright
Copyright © Kluwer 1999

References

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