|
|
 |
|
| Orbital semi-major axis | 39.48 A.U. 5906 million km |
| Orbital eccentricity | 0.249 |
| Perihelion | 29.66 A.U. 4437 million km |
| Aphelion | 49.31 A.U. 7376 million km |
| Mean orbital speed | 4.74 km/s |
| Sidereal orbital period | 248.0 tropical years |
| Synodic orbital period | 366.72 solar days |
| Orbital inclination to the ecliptic | 17.15° |
| Greatest angular diameter, as seen from Earth | 0.11" |
| Mass | 1.27  1022 kg0.0021 (Earth = 1) |
| Equatorial radius | 1137 km 0.18 (Earth = 1) |
| Mean density | 2060 kg/m3 0.374 (Earth = 1) |
| Surface gravity | 0.66 m/s2 0.067 (Earth = 1) |
| Escape speed | 1.2 km/s |
| Sidereal rotation period | —6.387 solar days (retrograde) |
| Axial tilt | 118° |
| Surface magnetic field | unknown |
| Magnetic axis tilt relative to rotation axis | — |
| Mean surface temperature | 40 to 60 K |
| Number of moons | 1 |
PLANETARY DATA: PLUTO