Free librations of the two-layer Moon and the possibilities of their detection

Details Free librations of the two-layer Moon and the possibilities of their detection Free librations of the two-layer Moon and the possibilities of their detection

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008adspr..42.1398p&link_type=abstract

Advances in Space Research, Volume 42, Issue 8, p. 1398-1404.

Physics

1

Scientific paper

Based on the forthcoming second stage of the Japanese Lunar mission ILOM (2013), when an optical telescope will be set on the surface near one of the Lunar poles, the possibility to detect free Lunar modes (Chandler-like wobble and free-core nutation) is considered. The difference between the Lunar Eulerian and Chandler-like wobble is explained. The terms “arbitrary libration” and “free libration” are discussed. The geometrical and physical interpretations of the free polar motion over the Lunar surface are considered from the viewpoints of Lunar surface-based observations and the Lunar Navigation Almanac. The dependencies of the free libration period on the core’s radius, density, and ellipticity are modelled and discussed.

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