The other moons of Pluto , Nix , Hydra , Kerberos and Styx , orbit the same barycenter .
Moons are not large enough to be spherical , and moons are simply considered to be satellites of Pluto ( or of Pluto -- Charon ) .
The other moons of Pluto , Nix , Hydra , Kerberos and Styx , orbit the same barycenter , but they are not large enough to be spherical , and they are simply considered to be satellites of Pluto ( or of Pluto -- Charon ) .