Planetary data for Jupiter

mean distance from Sun 778,000,000 km (5.2 AU)

eccentricity of orbit 0.049

inclination of orbit to ecliptic 1.3°

Jovian year (sidereal period of revolution) 11.86 Earth years

visual magnitude at mean opposition -2.70

mean synodic period* 398.88 Earth days

mean orbital velocity 13.1 km/sec

equatorial radius** 71,492 km

polar radius** 66,854 km

mass 18.99 × 10²⁶ kg

mean density 1.33 g/cm³

gravity** 2,312 cm/sec²

escape velocity 59.5 km/sec

rotation periods

System I (±10° from equator) 9 hr 50 min 30 sec

System II (higher latitudes) 9 hr 55 min 41 sec

System III (magnetic field) 9 hr 55 min 29 sec

inclination of equator to orbit 3.13°

dimensions of Great Red Spot 20,000 × 12,000 km

magnetic field strength at equator 4.3 gauss

number of known moons more than 60

planetary ring system 1 main ring; 3 less-dense components

*Time required for the planet to return to the same position in the sky relative to the Sun as seen from Earth.

**Calculated for the altitude at which 1 bar of atmospheric pressure is exerted.