There appears to be no such thing. "the radius for a selenostationary orbit is much farther than the Hill radius, meaning that no stable orbit can be achieved

There appears to be no such thing. "the radius for a selenostationary orbit is much farther than the Hill radius, meaning that no stable orbit can be achieved as it would be too much perturbed by the Earth and/or the Sun" "all of the Lagrangian points of the Earth-Moon system are stationary relative to the Moon surface" ...but then it is explained that stationary doesn't mean stable. Links: https://astronomy.stackexchange.com/questions/20499/is-it-possible-to-achieve-a-stable-lunarstationary-orbit-around-the-moon https://astronomy.stackexchange.com/questions/20499/is-it-po... https://en.wikipedia.org/wiki/Hill_sphere https://en.wikipedia.org/wiki/Hill_sphere