title: Lunar Ephemeris: Delaunay's Theory Revisited.
abstract: 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.
authors.forename: A
authors.initials: A
authors.lastname: Deprit
authors.forename: J
authors.initials: J
authors.lastname: Henrard
authors.forename: A
authors.initials: A
authors.lastname: Rom