Resonant forcing of Mercury's libration in longitude

Details Resonant forcing of Mercury's libration in longitude Resonant forcing of Mercury's libration in longitude

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009icar..199....1p&link_type=abstract

Icarus, Volume 199, Issue 1, p. 1-8.

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11

Scientific paper

The period of free libration of Mercury's longitude about the position it would have had if it were rotating uniformly at 1.5 times its orbital mean motion is close to resonance with Jupiter's orbital period. The Jupiter perturbations of Mercury's orbit thereby lead to amplitudes of libration at the 11.86 year period that may exceed the amplitude of the 88 day forced libration determined by radar. Mercury's libration in longitude may be thus dominated by only two periods of 88 days and 11.86 years, where other periods from the planetary perturbations of the orbit have much smaller amplitudes.

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