| Distance From Sun
|
| Perihelion
| 740,600,000 km
(460,200,000 mi)
|
| Mean
| 778,400,000 km
(483,600,000 mi)
|
| Aphelion
| 816,000,000 km
(507,000,000 mi)
|
| Distance From Earth
|
| Shortest
| 628,760,000 km
(390,700,000 mi)
|
| Greatest
| 970,000,000 km
(600,000,000 mi)
|
| Size
|
| Mass (earth=1)
| 317.8
|
| Radius (earth=1)
| 11.2
|
| Mean density (water=1)
| 1.3
|
|
| Orbit/Rotation
|
Rotation period
(about axis)
| 9.8 hours
|
| Period of revolution about sun
| 11.86 years
|
Inclination of orbit
(degrees)
| 1.30°
|
| Eccentricity of orbit
| 0.05
|
| Temperature
|
| -125° to 17° C
|
| (-193° to 63° F)
|
| Number of Satellites
|
| 16
|
| Atmosphere
|
| Hydrogen, helium (also traces of methane, ammonia, carbon monoxide, ethane, acetylene, phosphine, and water vapor).
|
|