Relativistic Warning to Space Missions Aimed to Reach Phobos

Alexander P.  Yefremov

doi:10.4236/ijaa.2011.14025

Alexander P. Yefremov

Abstract: Disagreement in estimations of the observed acceleration of Phobos yields several theories empirically modifying classical description of motion of the satellite, but its orbital positions detected by Mars-aimed spacecraft differ from predictions. It is shown that the satellite’s orbital perturbations can be explained as manifestations of the relativistic time-delay effect ignored in classical models. So computed limits of Phobos’ acceleration essentially exceed the experimental values. The satellite’s expected orbital shift is calculated for the moment of contact with a landing module of the Phobos-Grunt project; the shift assessed in kilometers may prevent the mission success. Limits of the apparent relativistic accelerations are predicted for fast satellites of Jupiter.

Keywords: Planet, Satellite, Earth, Mars, Phobos, Acceleration, Shift, Quaternion, Relativity

Cite this paper: nullA. Yefremov, "Relativistic Warning to Space Missions Aimed to Reach Phobos," International Journal of Astronomy and Astrophysics, Vol. 1 No. 4, 2011, pp. 200-203. doi: 10.4236/ijaa.2011.14025.

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