Styx
Natural satellite
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Styx is a small natural satellite of Pluto whose discovery was announced on 11 July 2012. It was discovered by use of the Hubble Space Telescope, and is the smallest of the five known moons of Pluto. Wikipedia
Discovered: June 26, 2012
Orbital period: 20 days
Discoverer: Mark Showalter
Alternative names: S/2012 (134340) 1; S/2012 P 1
Axial tilt: 82° (to orbital plane)
Eccentricity: 0.005787±0.001144
Inclination: 0.809°±0.162°