Solar System Exploration: Planets: Jupiter: Moons: Ganymede: Facts & Figures

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Facts & Figures

Ganymede: Facts & Figures

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Facts & Figures

Discovered By

Galileo Galilei

Date of Discovery

1610

Orbit Size Around Jupiter (semi-major axis)

Metric: 1,070,400 km

Periapsis (closest)

Metric: 1,069,008 km

Apoapsis (farthest)

Metric: 1,071,792 km

Sidereal Orbit Period (Length of Year)

7.15455296 Earth days

Orbit Circumference

Metric: 6,725,518.71 km

Average Orbit Velocity

Metric: 39,165.6 km/h

Orbit Eccentricity

0.0013

Orbit Inclination

0.177 degree

Mean Radius

Metric: 2,631.2 km

Equatorial Circumference

Metric: 16,532.3 km

Volume

Metric: 76,304,506,998 km³

Mass

Metric: 148,185,846,875,052,000,000,000 kg

Scientific Notation: 1.4819 x 10²³ kg

Density

Metric: 1.942 g/cm³

Surface Area

Metric: 86,999,665.93 km²

Surface Gravity

Metric: 1.428 m/s²

Escape Velocity

Metric: 9,869 km/h

English: 6,133 mph

Scientific Notation: 2742 m/s

Sidereal Rotation Period (Length of Day)

7.155 Earth days

By Comparison: Synchronous with orbital period

Atmospheric Constituents

Oxygen

NASA Official: Kristen Erickson

Advisory: Dr. James Green, Director of Planetary Science

Outreach Manager: Alice Wessen

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