Long-term Dynamics of Methone, Anthe and Pallene, Small Satellites of Saturn

Details Long-term Dynamics of Methone, Anthe and Pallene, Small Satellites of Saturn Long-term Dynamics of Methone, Anthe and Pallene, Small Satellites of Saturn

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.6802c&link_type=abstract

American Astronomical Society, DPS meeting #41, #68.02

Astronomy and Astrophysics

Astronomy

Scientific paper

We numerically investigate the long-term dynamics of the Saturn's small satellites Methone (S/2004 S1), Anthe (S/2007 S4) and Pallene (S/2004 S2). In our numerical integrations, these satellites are disturbed by non-spherical shape of Saturn and the six nearest regular satellites. The stability of the small bodies is studied here by analyzing long-term evolution of their orbital elements.
We show here that long-term evolution of Pallene is dictated by a quasi-secular resonance involving the ascending nodes and longitudes of pericentric distances of Mimas and Pallene. Long-term orbital evolution of Methone and Anthe are probably chaotic since: i) their orbits randomly cross the orbit of Mimas in time scales of thousands years); ii) numerical simulations involving both small satellites are strongly affected by small changes in initial conditions.

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