Gazetteer of Planetary Nomenclature
International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)
Planetary Names: Plutonian System

Plutonian System

Moons of Pluto

Satellites in the plutonian system are named for characters and creatures in the myths surrounding Pluto (Greek Hades) and the classical Greek and Roman Underworld.

The largest and nearest satellite, Charon, was discovered in 1978 and is approximately 1200 km in diameter.

Styx, Nix, Kerberos, and Hydra are much smaller. They were not discovered until much later, Nix and Hydra in 2005, Kerberos in 2011, and Styx in 2012.