Orbit

Styx orbits the Pluto-Charon barycenter at a distance of 42,656 km, putting it between the orbits of Charon and Nix. All of Pluto's moons appear to travel in orbits that are very nearly circular and coplanar, described by Styx's discoverer Mark Showalter as "neatly nested ... a bit like Russian dolls".

Its orbital period of 20.16155 days is about 5.0% from a

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