← ALL CELESTIAL BODIES
Credit: NASA/JHUAPL/SwRI Public domain — NASA Media Usage Guidelines
Physical Properties
5 km
Orbit
Pluto
20.16155 d
Sources & Further Reading
- NASA — official mission / factsheet page
- Wikipedia — extensive cross-referenced article
- NASA u2014 Styx
Numerical values (radius, mass, orbital elements, temperatures) are drawn from NASA NSSDC Planetary Fact Sheets, JPL Horizons, and the JPL Small-Body Database. Last refreshed: 2026-04-18 18:19:26.
Styx is the innermost small moon of Pluto and was the last of Pluto’s five moons to be discovered, found by Hubble imaging in 2012. New Horizons observed an irregular ~16 × 9 × 8 km body.