Abstract
The photogravitational oblate restricted three-body problem is carried out within the post-Newtonian framework. The primaries are assumed to be oblate as well as radiant sources. The perturbed location of the collinear point is computed. A series form of location is obtained as a new analytical results. In order to introduce a semi-analytical view, a Mathematica program is constructed so as to draw the locations of collinear point versus the mass ratio taking into account one or more of the considered perturbations. All the obtained figures are analyzed.