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| Orbital semi-major axis | 19.19 A.U. 2871 million km |
| Orbital eccentricity | 0.047 |
| Perihelion | 18.29 A.U. 2736 million km |
| Aphelion | 20.10 A.U. 3006 million km |
| Mean orbital speed | 6.80 km/s |
| Sidereal orbital period | 83.75 tropical years |
| Synodic orbital period | 369 .66 solar days |
| Orbital inclination to the ecliptic | 0.77° |
| Greatest angular diameter, as seen from Earth | 4.1" |
| Mass | 8.68 14.54 (Earth = 1) |
| Equatorial radius | 25,559 km 4.01 (Earth = 1) |
| Mean density | 1271 kg/m3 0.230 (Earth = 1) |
| Surface gravity* | 8.87 m/s2 0.91 (Earth = 1) |
| Escape speed | 21.3 km/s |
| Sidereal rotation period | 0.72 solar days (retrograde) |
| Axial tilt** | 97.92° |
| Surface magnetic field | 0.74 (Earth = 1) |
| Magnetic axis tilt relative to rotation axis | 58.6° |
| Mean surface temperature | 58 K |
| Number of moons | 17 |