On the Dynamics of a Deformable Satellite in the Gravitational Field of a Spherical Rigid Body

Details On the Dynamics of a Deformable Satellite in the Gravitational Field of a Spherical Rigid Body On the Dynamics of a Deformable Satellite in the Gravitational Field of a Spherical Rigid Body

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cemda..86....1o&link_type=abstract

Celestial Mechanics and Dynamical Astronomy, v. 86, Issue 1, p. 1-28 (2003).

Astronomy and Astrophysics

Astronomy

2

Scientific paper

In this paper, a model is developed for the dynamics of a system of two bodies whose material points are under the influence of a central gravitational force. One of the bodies is assumed to be rigid and spherically symmetric, while the other is assumed to be deformable. To develop a tractable model for the system, the deformable body is modeled using Cohen and Muncaster's theory of a pseudo-rigid body. The resulting model of the system has several of the features, such as angular momentum conservation, exhibited by more restrictive models. We also show how the self-gravitation of the deformable body can be accommodated using appropriate constitutive equations for a force tensor. This enables our model to subsume many existing models of ellipsoidal figures of equilibrium. After the model and its conservations have been discussed, attention is restricted to steady motions of the system. Several results, which generalize recent works on rigid satellites, are established for these motions. For a specific choice of constitutive equations for the pseudo-rigid body, we determine the steady motions with the aid of a numerical continuation method. These results can also be considered as generalizations of earlier works on Roche's ellipsoids of equilibrium.

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