Corpus ID: 19977838

Chaotic Motions of F-Ring Shepherds

  title={Chaotic Motions of F-Ring Shepherds},
  author={P. Goldreich and N. Rappaport},
  journal={arXiv: Astrophysics},
  • P. Goldreich, N. Rappaport
  • Published 2002
  • Physics
  • arXiv: Astrophysics
  • Recent HST images of the Saturnian satellites Prometheus and Pandora show that their longitudes deviate from predictions of ephemerides based on Voyager images. Currently Prometheus is lagging and Pandora leading these predictions by somewhat more than 20°. We show that these discrepancies are fully accounted for by gravitational interactions between the two satellites. These peak every 24.8 days at conjunctions and excite chaotic perturbations. The Lyapunov exponent for the Prometheus-Pandora… CONTINUE READING
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