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Observations of Mars 1950-1976 Compared to Ephemerides

Published online by Cambridge University Press:  14 August 2015

R. L. Duncombe ,
Y. Kubo  and
P. K. Seidelmann
R. L. Duncombe
Affiliation:
The University of Texas at Austin
Y. Kubo
Affiliation:
The University of Texas at Austin
P. K. Seidelmann
Affiliation:
The University of Texas at Austin

Extract

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The present basis for the ephemeris of Mars in the National Ephemerides is the theory of S. Newcomb (1898) as amended by the corrections of Ross (1917). These amendments by Ross, however, are empirical in nature and therefore the present ephemeris of Mars does not have a strictly gravitational basis. In order to provide a gravitationally consistent basis for the ephemeris of Mars, Clemence (1949, 1961) constructed a new general perturbation theory based on the final elements of Mars as derived by Newcomb for the epoch 1850. To test the adequacy and accuracy of this new theory, Clemence compared it against 87 observations from 1802-1839 and 1931-1950. This provided provisional values of the constants (without secular variation) for his new theory. These provisional elements and Clemence's theory were used to produce a heliocentric ephemeris of Mars for the period 1800-2000 (Duncombe and Clemence 1960, Duncombe 1964).

Type
Part III: Ephemerides, Equinox and Occultations
Information
Symposium - International Astronomical Union , Volume 81: Dynamics of the Solar System , 1979 , pp. 121 - 127
Copyright
Copyright © Reidel 1979 

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