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About Styx
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.
Physical Properties
5 km
Orbit
Pluto
20.16155 d
Gallery
Hand-picked mission imagery of Styx sourced from NASA and partner archives. Click any photo for full resolution and source attribution.
Imagery on this page is provided by the original mission teams. Full attribution terms: Image Rights & Credits.
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: 2026-06-08 01:37:02.