Abstract
Thej=2 lunar ephemeris is based on a flattening of the Earth which is slightly different from the 1964 IAU recommended value. The total effects of Earth-oblateness on the analytical lunar theory are determined, and the corrections, which are about 0″.02 in lunar longitude and latitude, are derived.
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Van Flandern, T.C. Note on the Earth-figure perturbations in the lunar theory. Celestial Mechanics 13, 511–514 (1976). https://doi.org/10.1007/BF01229104
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DOI: https://doi.org/10.1007/BF01229104