Lunar Ephemeris: Delaunay's Theory Revisited
André Deprit 1,
Jacques Henrard 1, and
Arnold Rom 1
1 Boeing Scientific Research Laboratories, Seattle, Washington 98124
Delaunay's reduced Hamiltonian of the main problem in lunar theory is checked against a new analytical theory based on Lie transforms. It is found to be correct up to order 9 with the exception of one error in addition at order 7