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Dynamical Constants and Reference Parameters for Mars

Published online by Cambridge University Press:  12 April 2016

William H. Michael Jr.  and
George M. Kelly
William H. Michael Jr.
Affiliation:
NASA-Langley Research Center and Analytical Mechanics Associates, Inc.Hampton, Virginia 23665, USA
George M. Kelly
Affiliation:
NASA-Langley Research Center and Analytical Mechanics Associates, Inc.Hampton, Virginia 23665, USA

Abstract

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Dynamical constants and other fundamental reference parameters for Mars have been derived from analyses of Viking lander ranging and Doppler tracking data covering a time span of nearly four years. Precise values have been obtained for the coordinates of the spin axis and for the rotation rate, suggesting that these Viking-derived values are definitive and are suitable for adoption by the IAU. Preliminary results have been obtained for a small seasonal variation in the rotation rate, and progress has been made toward a direct determination of the precession constant.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 56: Reference Coordinate Systems for Earth Dynamics , August 1980 , pp. 325 - 328
Copyright
Copyright © Reidel 1981

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