10 km10 milesStyxNixKerberosHydraCharonThis composite image shows part of Pluto’s
largest moon, Charon, and all four small
moons, as resolved by the Long Range
Reconnaissance Imager on the New Horizons
spacecraft. Charon has a diameter of 751 miles
(1,212 km). Nix and Hydra have comparable
sizes, approximately 25 miles (40 km) across
in their longest dimension. Kerberos and Styx
are much smaller and have comparable sizes,
roughly 6 to 7 miles (10 to 12 km) across in
their longest dimension.
The New Horizons
spacecraft, which had
its closest encounter
with Pluto on July 14,
2015, revealed the
planet in spectacular
detail.CHARON AND THE SMALL MOONS OF PLUTO