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| Mass (kg) | 1.90 x 1027 |
| Diameter (km) | 142,800 |
| Mean density (kg/m3) | 1314 |
| Escape velocity (m/s) | 59500 |
| Average distance from Sun | 5.203 AU (778,412,020 km) |
| Rotation period (length of day in Earth days) | 0.41 (9.8 Earth hours) |
| Revolution period (length of year in Earth years) | 11.86 |
| Obliquity (tilt of axis degrees) | 3.08 |
| Orbit inclination (degrees) | 1.3 |
| Orbit eccentricity (deviation from circular) | 0.048 |
| Mean surface temperature (K) | 120 (cloud tops) |
| Visual geometric albedo (reflectivity) | 0.44 |
| Atmospheric components | 90% hydrogen, 10% helium, .07% methane |
| Rings | Faint ring. Infrared spectra imply dark rock fragments. |
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