Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...125..150n&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 125, no. 1, Aug. 1983, p. 150-167. NASA-supported research.
Astronomy and Astrophysics
Astronomy
159
Astrometry, Planet Ephemerides, Errors, Least Squares Method, Libration, Lunar Rangefinding, Numerical Integration, Orbital Mechanics, Radar Measurement, Planets, Moon, Astronomy, Ephemeris, Analysis, Procedure, Observations, Radar Observations, Laser Ranging, Models, Accretion, Comparisons, History, Theoretical Studies, Parameters
Scientific paper
It is pointed out that the 1960's were the turning point for the generation of lunar and planetary ephemerides. All previous measurements of the positions of solar system bodies were optical angular measurements. New technological improvements leading to immense changes in observational accuracy are related to developments concerning radar, Viking landers on Mars, and laser ranges to lunar corner cube retroreflectors. Suitable numerical integration techniques and more comprehensive physical models were developed to match the accuracy of the modern data types. The present investigation is concerned with the first integrated ephemeris, DE 102, which covers the entire span of the historical astronomical observations of usable accuracy which are known. The fit is made to modern data. The integration spans the time period from 1411 BC to 3002 AD.
Newhall X. X.
Standish Miles E.
Williams James G.
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