New families of doubly symmetric periodic solutions of Hill problem

We consider a generalization of the well-known celestial mechanics problem - Hill problem. This generalization allows to obtain new families of periodic solutions of Hill problem from the periodic orbits of the sinodical Kepler problem by the method of generating solutions. Bifurcations of the libration points and main families of periodic orbits of sinodical Kepler problem are described. New families of doubly symmetric periodic orbits of Hill problem are computed.