Origin of chaos in the Prometheus-Pandora system

@article{Goldreich2003OriginOC,
  title={Origin of chaos in the Prometheus-Pandora system},
  author={Peter Goldreich and Nicole J. Rappaport},
  journal={Icarus},
  year={2003},
  volume={166},
  pages={320-327}
}
We demonstrate that the chaotic orbits of Prometheus and Pandora are due to interactions associated with the 121:118 mean motion resonance. Differential precession splits this resonance into a quartet of components equally spaced in frequency. Libration widths of the individual components exceed the splitting resulting in resonance overlap which causes the chaos. A single degree of freedom model captures the essential features of the chaotic dynamics. Mean motions of Prometheus and Pandora… Expand
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