Secular tidal changes in lunar orbit and Earth rotation

  title={Secular tidal changes in lunar orbit and Earth rotation},
  author={James G. Williams and Dale H. Boggs},
  journal={Celestial Mechanics and Dynamical Astronomy},
Small tidal forces in the Earth–Moon system cause detectable changes in the orbit. Tidal energy dissipation causes secular rates in the lunar mean motion n, semimajor axis a, and eccentricity e. Terrestrial dissipation causes most of the tidal change in n and a, but lunar dissipation decreases eccentricity rate. Terrestrial tidal dissipation also slows the rotation of the Earth and increases obliquity. A tidal acceleration model is used for integration of the lunar orbit. Analysis of lunar… 

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