  We investigate the motion of spinning test bodies in General Relativity. By
means of a multipolar approximation method for extended test bodies we derive
the equations of motion, and classify the orbital motion of pole-dipole test
bodies in the equatorial plane of the Kerr geometry. An exact expression for
the periastron shift of a spinning test body is given. Implications of test
body spin corrections are studied and compared with the results obtained by
means of other approximation schemes.
