Periodic orbits around L4 in the Restricted three body problem have been determined where the primaries are axes symmetric bodies and source of radiation pressure. Throughout the studies, a constant U has been introduced in the Lagrangian in such a way that the energy constant (h) vanishes at L4. A mobile coordinate system is used to determine the periodic orbits by giving displacement to these coordinates along the normal and the tangent. An algorithm is constructed in two stages, to draw the periodic orbits. These are: first predictor-part and then corrector-part. In each chapter, five...