Lunar Ephemeris: Delaunay's Theory Revisited

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Science  26 Jun 1970:
Vol. 168, Issue 3939, pp. 1569-1570
DOI: 10.1126/science.168.3939.1569


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

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