Original: IAU Circular No. 8625 describing the discovery The satellite orbits the barycenter of the system in the same plane as Charon and Nix, at a distance of about 65,000 km.
Simplified: IAU Circular No. 8625 describing the discovery The moon orbits the barycenter of the system in the same plane as Charon and Nix, at a distance of about 65,000 km.