Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...190..342c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 190, no. 1-2, Jan. 1988, p. 342-352.
Astronomy and Astrophysics
Astronomy
46
Celestial Mechanics, Moon, Planet Ephemerides, Secular Variations, Tides, Moon, Ephemerides, History, Celestial Mechanics, Astronomy, Models, Analytical Methods, Calculations, Motion, Comparisons, Tidal Effects, Stability, Parameters, Eccentricity, Compter Methods
Scientific paper
New expressions for mean lunar arguments are obtained. With respect to ELP 2000-82, the main improvement consists in computing secular terms proportional to powers 3 and 4 of time. Such terms arise from secular variations of solar eccentricity and longitude of perigee, Earth figure effects and tidal effects. A semi-analytical solution for the lunar motion, ELP 2000-85, is presented which is valid over a time span of few thousand years and easily handled. Its estimated internal precision varies from 0".5 to about 10" over the time span (2000A.D. - 1500B.C.). A comparison of ELP 2000-85 with the JPL numerical integration LE 51, over a similar time span, has been performed. The leading point of the comparison is a secular drift of 0".0351/cy2 in mean mean longitude between the two solutions. After removing this secular drift the differences have the same magnitude as the estimated internal precision of ELP 2000-85. For historical times, this secular drift as well as internal uncertainty of ELP 2000-85 are far below the uncertainties resulting from the tidal secular acceleration. For practical purpose, we give in an appendix, an abridged solution usable to compute a low precision lunar ephemeris (20") over a long time span for a given value of the tidal secular acceleration (-23".895/cy2).
Chapront Jean
Chapront-Touze Michelle
No associations
LandOfFree
ELP 2000-85 - A semi-analytical lunar ephemeris adequate for historical times does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with ELP 2000-85 - A semi-analytical lunar ephemeris adequate for historical times, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ELP 2000-85 - A semi-analytical lunar ephemeris adequate for historical times will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1043632