An observational test for the origin of the Titan-Hyperion orbital resonance |
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Authors: | SJ Peale |
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Institution: | Department of Physics, University of California, Santa Barbara, California 93106, USA |
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Abstract: | If Hyperion's radius is near the upper limit of recent estimates, and tidal dissipation in Hyperion is reasonably well represented by a frequency-independent Q ? 2–300, finding Hyperion rotating in the 3:2 spin-orbit resonance like Mercury would imply a primordial origin for the Titan-Hyperion 4:3 orbital resonance. Independent of this test, observation of Hyperion's spin rate will place an upper bound on the average tidal effective Q for the satellite as a function of its assumed initial angular velocity. |
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