Styx

Styx
Date of discovery	Date of discovery::June 26, 2012
Name of discoverer	Discoverer::M. R. Showalter
Name origin	Name origin::River of the underworld, and object of an oath binding even on the gods.
Orbital characteristics
Celestial class	Member of::Moon
Primary	Primary::Pluto
Order from primary	Order::2
Perihadion	Periapsis::42,409 km
Aphadion	Apoapsis::42,903 km
Semi-major axis	Semi-major axis::42,656 km
Orbital eccentricity	Orbital eccentricity::0.005787
Sidereal month	Sidereal period::20.16155 da
Inclination	Inclination::0.809° to Pluto's equator
Physical characteristics
Color	Color::#AAAAAA

Styx is the second presently known moon of Pluto. M. R. Showalter of the New Horizons Imaging Team discovered it in 2012. They were searching carefully for any stray object with which their robot rocket probe New Horizons might collide in its passage through the Plutonian system.