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.