The Orbits and Masses of the Martian Satellites and the Libration of Phobos

  title={The Orbits and Masses of the Martian Satellites and the Libration of Phobos},
  author={R. A. Jacobson},
This paper reports on an update to the orbits and masses of the Martian satellites Phobos and Deimos. We obtained the orbits by fitting a numerical integration to all available Earth-based astrometry through the opposition of 2003, spacecraft imaging observations through 2007, and the Doppler tracking of the Viking and Phobos 2 spacecraft; the Doppler data provide information on the satellite masses. Our dynamical model included the figure acceleration due to a librating Phobos; we determined… CONTINUE READING


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