Claim: Pluto has something in its orbit.
Evidence: Pluto has five known moons : Charon -LRB- the largest , with a diameter just over half that of Pluto -RRB- , Styx , Nix , Kerberos , and Hydra.
Hydra is the outermost known moon of Pluto.
Kerberos is a small natural satellite of Pluto , about 12 km in its longest dimension.
Nix is a natural satellite of Pluto.