Kerberos is the fourth moon of Pluto and is directly between Hydra and Nix. It is very tiny, and probably an asteroid captured by Pluto’s gravity. It is close to a 5:1 resonance with Pluto’s largest moon, Charon. It is in a nearly orbital resonance with Nix and Hydra (1:4 and 1:6 resonance). It was visited by New Horizons when it visited Pluto and the rest of Pluto’s moons.
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