Tidal evolution of the Uranian satellites. I - Passage of Ariel and Umbriel through the 5:3 mean-motion commensurability

Statistics – Computation

Scientific paper

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Ariel, Miranda, Orbital Resonances (Celestial Mechanics), Planetary Evolution, Umbriel, Uranus Satellites, Computational Astrophysics, Jupiter Satellites, Three Body Problem, Titania, Voyager 2 Spacecraft, Uranus, Tidal Effects, Evolution, Satellites, Ariel, Umbriel, Motion, Celestial Mechanics, Dissipation, Resonance, Orbits, Eccentricity, Thermal History, Calculations, Numerical Methods, Trajectory

Scientific paper

A significant chaotic zone is associated with the 5:3 mean-motion commensurability resonance through which Ariel and Umbriel would have passed, in the event that Uranus' specific dissipation function were less than 100,000; the standard theory for passage through orbital resonances would in this case be inapplicable, in view of significant changes in the probability and the mechanism of capture into the resonance. It is suggested that tidal evolution within the chaotic zone may have pushed eccentrocities to comparatively high values at which the probability of escape from resonance remained. Eccentricities sufficiently great to affect Ariel's thermal history have not been found.

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