Being one of four of the Galilean moons (largest four) of Jupiter, io is one the most prominent moons in our solar system. The moon is highly active with erupting volcanoes, caused by the intense tidal gravity of Jupiter, keeping the yellow (sulfur) surface of the moon new.
Orbital period: 1.78 earth days
Orbital Speed: 12.33 km/s
Inclination: 2.21°
Mean Radius: 1821.6 km
Circumference: 1,445.5 km
Mass: 8.93×1022 kg
Surface Gravity: 1.796 m/s2
Apparent Magnitude: 5.02
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