L. R. Bedin (1), G. Piotto (1), J. Anderson (2), S. Cassisi (3), I. R. King (4), Y. Momany (1), G. Carraro (1). ((1) Dipartimento di Astronomia, Universita` di Padova, ITALY; (2) Department of Physics and Astronomy, Rice University, USA; (3) Osservatorio Astronomico Collurania, ITALY; (4) Astronomy Department, University of Washington, USA)
