  The features of equatorial motion of an extended body in Kerr spacetime are
investigated in the framework of the Mathisson-Papapetrou-Dixon model. The body
is assumed to stay at quasi-equilibrium and respond instantly to external
perturbations. Besides the mass, it is completely determined by its spin, the
multipolar expansion being truncated at the quadrupole order, with a
spin-induced quadrupole tensor. The study of the radial effective potential
allows to analytically determine the ISCO shift due to spin and the associated
frequency of the last circular orbit.
