Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...103..295c&link_type=abstract
Astronomy and Astrophysics, vol. 103, no. 2, Nov. 1981, p. 295-304. In French.
Astronomy and Astrophysics
Astronomy
8
Moon, Orbits, Motion, Comparisons, Models, Perturbations, Data, Tidal Effects, Ephemeris, Celestial Mechanics, Theoretical Studies, Procedure, Astronomy
Scientific paper
The semianalytical solution for the lunar orbit, called ELP-2000, is compared to results of a numerical integration, LE-51, at the Jet Propulsion Laboratory. LE-51 was designed to compare a lunar ephemeris with observations, including laser ranging. The components of ELP-2000 are described, noting the contributions to the Main Problem, perturbations due to the presence of the earth, direct and indirect planetary perturbations, etc. An ephemeris of 1980-2002 has been generated in two-day steps. The models are compared for lunar and solar parameters, reference frames, and trends in lunar angles, with specific attention to the shifting of the nodes and perigee. It is noted that the results are tentative, as ELP-2000 is as yet incomplete and LE-51 is the only model available for comparison.
Chapront Jean
Chapront-Touze Michelle
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