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Table 2

Main frequencies and periods that describe the orbit of Phobos used in the analysis.

Arg. Freq (rad/days) Per (days) Month

19.694 0.3190 anomalistic month (periapse to periapse)
D 19.693 0.3191 synodic month (new moon to new moon)
F 19.710 0.3188 draconic month (node to node)
0.009145 687.07
ψ 6.124 1.026
ϖ ∗′ 3.06 × 10-7 20.5 × 106

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