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Credit: NASA/JHUAPL/SwRI Public domain — NASA Media Usage Guidelines
Physical Properties
25 km
4.5e16 kg
Orbit
Pluto
24.85463 d
Sources & Further Reading
- NASA — official mission / factsheet page
- Wikipedia — extensive cross-referenced article
- NASA u2014 Nix
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.
Nix is a small, elongated moon of Pluto, about 50 km on its longest axis, discovered by the Hubble Space Telescope in 2005. It rotates chaotically (its rotation axis and period change unpredictably because of torques from Pluto and Charon). Imaged by New Horizons in 2015.