On the orbital evolution of the Martian satellites

Details On the orbital evolution of the Martian satellites On the orbital evolution of the Martian satellites

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.5651l&link_type=abstract

Journal of Geophysical Research, vol. 84, Sept. 10, 1979, p. 5651-5658.

Physics

19

Deimos, Orbit Perturbation, Orbital Mechanics, Phobos, Acceleration (Physics), Gravitational Fields, Mars (Planet), Tides, Mars, Satellites, Orbits, Evolution, Tidal Forces, Rigidity, Q Values, Composition, Phobos, Deimos, Origin, Inclination, Capture, Observations, Acceleration, Data, Mathematical Models, Comparisons, Dissipation, Gravitational Effects, Perturbations, Physical Properties, Parameters

Scientific paper

The tidal evolution of the Martian satellites is examined as a possible source of the modification of originally eccentric orbits of captured carbonaceous chondrites. Considerations of the rigidities and Love numbers of the planet and its satellites lead to the conclusion that the orbital evolution of Phobos can be significantly influenced if tidal dissipation occurs within the satellite, particularly if this dissipation is frequency dependent. Calculations show that Phobos could have evolved from a parabolic orbit into a circular orbit within the age of the solar system, however the time for Deimos to evolve would be excessively long. When the tidal equations are integrated backward into time, a similar origin for the two satellites and the intersection of satellite orbits in the past are obtained. It is suggested that Deimos was the core of a primordial body containing a large ice mantle, which would have remained outside the orbit of Phobos after capture. The inclinations of the satellite orbits can be accounted for if they were originally members of asteroid families with large inclinations to the ecliptic.

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