Titlebook: Dynamics of Natural and Artificial Celestial Bodies; Proceedings of the U Halina Pretka-Ziomek,Edwin Wnuk,David L. Richardso Conference pro

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Changes in Rotational Angular Momentum Due to Gravitational Interactions Between Two Finite Bodies of the change in rotational angular momentum of the non-spherical body are derived over one interaction (i.e. periapsis passage) between the bodies. The estimated changes are expressed in terms of trigonometric functions and generalized Hansen coefficients.

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Quasi-Static Motions of Viscoelastic Satellitesing that the stiffness of the ring is large and the dissipation is small enough, we study the quasi-static motion which is set in after free elastic oscillations have damped. In particular, the steady-state motions in the weakly elliptic orbit are found and their stability is investigated.