TITLE: $J_2$ effect and elliptic inclined periodic orbits in the collision restricted three--body problem 2008 SIAM Journal on Applied Dynamical Systems, 7 (1), pp 1--17 AUTHORS: Esther Barrabes, Josep M. Cors, Conxita Pinyol i Jaume Soler E-mails: barrabes@ima.udg.edu, cors@epsem.upc.edu, conxita.pinyol@uab.cat, jaume.soler.villanueva@upc.edu ABSTRACT: The existence of a new class of inclined periodic orbits of the collision restricted three--body problem is shown. The symmetric periodic solutions found are perturbations of elliptic kepler orbits and they exist only for special values of the inclination and are related to the motion of a satellite around an oblate planet.