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