  In the framework of the so-called gravitoelectromagnetic formalism, according
to which the equations of the gravitational field can be written in analogy
with classical electromagnetism, we study the gravitomagnetic field of a
rotating ring, orbiting around a central body. We calculate the gravitomagnetic
component of the field, both in the intermediate zone between the ring and the
central body, and far away from the ring and central body. We evaluate the
impact of the gravitomagnetic field on the motion of test particles and, as an
application, we study the possibility of using these results, together with the
Solar System ephemeris, to infer information on the spin of ring-like
structures.
