Periodic orbits around areostationary points in the Martian gravity field

Details Periodic orbits around areostationary points in the Martian gravity field Periodic orbits around areostationary points in the Martian gravity field

2012-03-08

arxiv.org/abs/1203.1775v2

Research in Astronomy and Astrophysics , Vol. 12, No. 5, pp. 551-562, 2012

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

25 pages, 10 figures, accepted for publication in Research in Astronomy and Astrophysics

Scientific paper

This study investigates the problem of areostationary orbits around Mars in the three-dimensional space. Areostationary orbits are expected to be used to establish a future telecommunication network for the exploration of Mars. However, no artificial satellites have been placed in these orbits thus far. In this paper, the characteristics of the Martian gravity field are presented, and areostationary points and their linear stability are calculated. By taking linearized solutions in the planar case as the initial guesses and utilizing the Levenberg-Marquardt method, families of periodic orbits around areostationary points are shown to exist. Short-period orbits and long-period orbits are found around linearly stable areostationary points, and only short-period orbits are found around unstable areostationary points. Vertical periodic orbits around both linearly stable and unstable areostationary points are also examined. Satellites in these periodic orbits could depart from areostationary points by a few degrees in longitude, which would facilitate observation of the Martian topography. Based on the eigenvalues of the monodromy matrix, the evolution of the stability index of periodic orbits is determined. Finally, heteroclinic orbits connecting the two unstable areostationary points are found, providing the possibility for orbital transfer with minimal energy consumption.

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