Evolution of the Janus-Epimetheus coorbital resonance due to torques from Saturn's rings

Details Evolution of the Janus-Epimetheus coorbital resonance due to torques from Saturn's rings Evolution of the Janus-Epimetheus coorbital resonance due to torques from Saturn's rings

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...64..425l&link_type=abstract

Icarus (ISSN 0019-1035), vol. 64, Dec. 1985, p. 425-434.

Physics

23

Celestial Mechanics, Janus, Saturn Rings, Saturn Satellites, Torque, Fourier Analysis, Kinematics, Resonance

Scientific paper

The effects of the gravitational interactions between Saturn's rings and the coorbital satellites, Janus and Epimetheus, on the 1:1 horseshoe resonance between these moons is examined. It is shown that the 7:6 resonance of these moons, which presumably maintains the sharp outer edge of the A ring, leads to a rapid tightening of the coorbital lock. The results lead to the prediction that the orbital configuration might evolve from the current horseshoe-type lock to one of tadpole orbits around a single Lagrangian point in about 20 myr.

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