Physics – Plasma Physics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...39..286c&link_type=abstract
Icarus, vol. 39, Aug. 1979, p. 286-294. NSF-NASA-supported research.
Physics
Plasma Physics
4
Atmospheric Models, Collisionless Plasmas, Exosphere, Hydrogen Atoms, Radiation Pressure, Satellite Orbits, Graphs (Charts), Lyman Alpha Radiation, Orbital Elements, Plasma Physics, Solar Radiation, Upper Atmosphere
Scientific paper
Perturbations of hydrogen atoms in Keplerian orbits are examined by analyzing the rates of change of the classical orbital elements. There are three main effects: high inclination orbits with eccentricities e at least 0.4 are forced toward the ecliptic plane within a few weeks, the perigees of direct orbits drift rapidly toward stable positions roughly westward of the planet, and satellite orbits in or near such a stable point rapidly lower their perigees and the satellite's life is ended by a collision in the atmosphere. Thus there are effects tending to diminish the number of highly eccentric orbits with distant apogees in six principal directions. The various lifetimes are compared for a sample of initial elements.
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