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King of the Planets
The most massive planet in our solar system -- with dozens of moons and an enormous magnetic field -- Jupiter forms a kind of miniature solar system. It resembles a star in composition, but did not grow big enough to ignite. The planet's swirling cloud stripes are punctuated by massive storms such as the Great Red Spot, which has raged for hundreds of years.

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  About Jupiter Moons Facts & Figures Jupiter vs. ... Missions FAQ

Discovered By
Known by the Ancients
Date of Discovery
Unknown
Orbit Size Around Sun (semi-major axis)
Metric: 778,340,821 km
English: 483,638,564 miles
Scientific Notation: 7.7834082 x 108 km (5.2028870 A.U.)
By Comparison: 5.203 x Earth
Perihelion (closest)
Metric: 740,679,835 km
English: 460,237,112 miles
Scientific Notation: 7.40680 x 108 km (4.951 A.U.)
By Comparison: 5.035 x Earth
Aphelion (farthest)
Metric: 816,001,807 km
English: 507,040,015 miles
Scientific Notation: 8.16002 x 108 km (5.455 A.U.)
By Comparison: 5.365 x Earth
Sidereal Orbit Period (Length of Year)
11.862615 Earth years
4,332.82 Earth days
By Comparison: 11.863 x Earth
Orbit Circumference
Metric: 4,887,595,931 km
English: 3,037,011,311 miles
Scientific Notation: 4.888 x 109 km
By Comparison: 5.200 x Earth
Average Orbit Velocity
Metric: 47,002 km/h
English: 29,205 mph
Scientific Notation: 1.3056 x 104 m/s
By Comparison: 0.438 x Earth
Orbit Eccentricity
0.04838624
By Comparison: 2.895 x Earth
Orbit Inclination
1.304 degrees
Equatorial Inclination to Orbit
3.1 degrees
Mean Radius
Metric: 69,911 km
English: 43,440.7 miles
Scientific Notation: 6.9911 x 104 km
By Comparison: 10.9733 x Earth
Equatorial Circumference
Metric: 439,263.8 km
English: 272,945.9 miles
Scientific Notation: 4.39264 x 105 km
By Comparison: 10.9733 x Earth
Volume
Metric: 1,431,281,810,739,360 km3
English: 343,382,767,518,322 mi3
Scientific Notation: 1.43128 x 1015 km3
By Comparison: 1321.337 x Earth
Mass
Metric: 1,898,130,000,000,000,000,000,000,000 kg
Scientific Notation: 1.8981 x 1027 kg
By Comparison: 317.828 x Earth
Density
Metric: 1.326 g/cm3
By Comparison: 0.241 x Earth
Surface Area
Metric: 61,418,738,571 km2
English: 23,713,907,537 square miles
Scientific Notation: 6.1419 x 1010 km2
By Comparison: 120.414 x Earth
Surface Gravity
Metric: 24.79 m/s2
English: 81.3 ft/s2
By Comparison: If you weigh 100 pounds on Earth, you would weigh 253 pounds on Jupiter.
Escape Velocity
Metric: 216,720 km/h
English: 134,664 mph
Scientific Notation: 6.020 x 104 m/s
By Comparison: 5.380 x Earth
Sidereal Rotation Period (Length of Day)
0.41354 Earth days
9.92496 hours
By Comparison: 0.41467 x Earth
Effective Temperature
Metric: -148 °C
English: -234 °F
Scientific Notation: 125 K
Atmospheric Constituents
Hydrogen, Helium
Scientific Notation: H2, He

Additional Information:

Namesake: King of the Roman gods

Discovered By
Known by the Ancients
Date of Discovery
Unknown
Orbit Size Around Sun (semi-major axis)
Metric: 778,340,821 km
English: 483,638,564 miles
Scientific Notation: 7.7834082 x 108 km (5.2028870 A.U.)
By Comparison: 5.203 x Earth
Perihelion (closest)
Metric: 740,679,835 km
English: 460,237,112 miles
Scientific Notation: 7.40680 x 108 km (4.951 A.U.)
By Comparison: 5.035 x Earth
Aphelion (farthest)
Metric: 816,001,807 km
English: 507,040,015 miles
Scientific Notation: 8.16002 x 108 km (5.455 A.U.)
By Comparison: 5.365 x Earth
Sidereal Orbit Period (Length of Year)
11.862615 Earth years
4,332.82 Earth days
By Comparison: 11.863 x Earth
Orbit Circumference
Metric: 4,887,595,931 km
English: 3,037,011,311 miles
Scientific Notation: 4.888 x 109 km
By Comparison: 5.200 x Earth
Average Orbit Velocity
Metric: 47,002 km/h
English: 29,205 mph
Scientific Notation: 1.3056 x 104 m/s
By Comparison: 0.438 x Earth
Orbit Eccentricity
0.04838624
By Comparison: 2.895 x Earth
Orbit Inclination
1.304 degrees
Equatorial Inclination to Orbit
3.1 degrees
Mean Radius
Metric: 69,911 km
English: 43,440.7 miles
Scientific Notation: 6.9911 x 104 km
By Comparison: 10.9733 x Earth
Equatorial Circumference
Metric: 439,263.8 km
English: 272,945.9 miles
Scientific Notation: 4.39264 x 105 km
By Comparison: 10.9733 x Earth
Volume
Metric: 1,431,281,810,739,360 km3
English: 343,382,767,518,322 mi3
Scientific Notation: 1.43128 x 1015 km3
By Comparison: 1321.337 x Earth
Mass
Metric: 1,898,130,000,000,000,000,000,000,000 kg
Scientific Notation: 1.8981 x 1027 kg
By Comparison: 317.828 x Earth
Density
Metric: 1.326 g/cm3
By Comparison: 0.241 x Earth
Surface Area
Metric: 61,418,738,571 km2
English: 23,713,907,537 square miles
Scientific Notation: 6.1419 x 1010 km2
By Comparison: 120.414 x Earth
Surface Gravity
Metric: 24.79 m/s2
English: 81.3 ft/s2
By Comparison: If you weigh 100 pounds on Earth, you would weigh 253 pounds on Jupiter.
Escape Velocity
Metric: 216,720 km/h
English: 134,664 mph
Scientific Notation: 6.020 x 104 m/s
By Comparison: 5.380 x Earth
Sidereal Rotation Period (Length of Day)
0.41354 Earth days
9.92496 hours
By Comparison: 0.41467 x Earth
Effective Temperature
Metric: -148 °C
English: -234 °F
Scientific Notation: 125 K
Atmospheric Constituents
Hydrogen, Helium
Scientific Notation: H2, He

Additional Information:

Namesake: King of the Roman gods