Origin of Prometheus Eccentricity

Details Origin of Prometheus Eccentricity Origin of Prometheus Eccentricity

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p34a..07r&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #P34A-07

Physics

6265 Planetary Rings, 6280 Saturnian Satellites

Scientific paper

A number of Saturn's small satellites, from Atlas to the coorbital satellites Janus and Epimetheus, move on orbits just outside the main rings of the planet. These satellites undergo extremely rapid resonant interaction with the rings and outward motion, strongly suggesting that they originated in Saturn's A ring. However, their eccentricities, of the order of 1/1000 are several orders of magnitude larger than what could be expected if the small satellites formed in the ring. This paper represents a first step to providing an explanation for this phenomenon, by focusing on the dynamical processes that have affected the eccentricity of Prometheus. The explanation invokes past resonances with the coorbital satellites combined with chaos due to overlapping of these resonances.

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