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Use of optical and radio astrometric observations of planets, satellites and spacecraft for ephemeris astronomy

E. V. Pitjeva

Proceedings of IAU Symposium No. 248, W. J. Jin, I. Platais, M.A.C. Perryman (Eds.) A giant step: from milli- to micro-arcsecastrometry, 20-22 (2008)

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Different types of radiometric observations of planets and spacecraft, as well as optical data used for constructing modern high-precision planet ephemerides are presented. New mass values for planets and asteroids are given. The IAA RAS EPM ephemerides (Ephemerides of Planets and the Moon) are the basis for the Russian “Astronomical Yearbook” and are used in the navigation program “GLONASS” and the cosmic program “Phobos-Grunt”.