| Mean distance from Sun: | 5.203 AU = 7.786x108 km |
| Maximum distance from Sun: | 5.455 AU=8.157x108 km |
| Minimum distance from Sun: | 4.951 AU=7.409x108 km |
| Mean orbital velocity: | 13.1 km/s |
| Siderial period: | 11.86 yr |
| Rotation period: | 9hr 50m 30s equatorial |
| Inclination of equator to orbit: | 3° 04' |
| Inclination of orbit to ecliptic: | 1°18' |
| Orbital eccentricity: | 0.048 |
| Diameter(equatorial): | 142,984 km 133,500 km polar |
| Diameter (Earth = 1): | 11.19 10.47 polar |
| Apparent diameter from Earth:Max: | 50.1" |
| Apparent diameter from Earth:Min: | 30.4" |
| Mass: | 1.90x1027 kg |
| Mass(Earth=1): | 317.8 |
| Mean density | 1326 kg/m3 |
| Surface gravity (Earth = 1) | 2.53 |
| Escape velocity | 59.5 km/s |
| Oblateness | 0.065 |
| Mean surface temperature:cloudtops | -110°C=-166°F=163K |
| Albedo | 0.52 |
| Brightest magnitude | -2.7 |
| Mean diameter of Sun from Jupiter | 6'09" |