Motion of the center of two masses and their motion about the center results from ingtegrals (6) and (8). At the proximity the masscenter moves along a orbit which slightly deviates from elliptical one, as much less as the planets are nearer one to other, regardless the mass-relation. The motion about the center takes place in a plane which is as much stable as the mass-relation is nearer to 1, but changes can be large when it is not so. in case $\varphi < 10^{-6}r$ can occur conversion from the temporary to the long proximity, but probability is infinitesimal. More less are possibilites that then occurs a realy collision of planets (it their surfaces are very rough).