Outermost of the four big moons Galileo found, and the most cratered object we know of.
Callisto is roughly one and a third times as wide as the Moon.
Callisto sits about five times the Earth-to-Moon distance from Jupiter.
Callisto takes about 17 Earth days to go once round Jupiter.
Callisto turns round once in about 17 Earth days; Earth takes about 24 hours. Its orbit takes exactly as long, so Callisto keeps the same face turned towards Jupiter the whole time.
Callisto has roughly one and a half times the mass of the Moon.
Callisto has roughly two and two thirds times the volume of the Moon.
On Callisto you would weigh roughly one eighth of what you weigh on Earth.
On Callisto it is −140 °C. Earth runs from −89.2 to 56.7 °C.
| Across | 4,821 km |
|---|---|
| Distance from the centre of the planet it orbits | 1.883 million km |
| Once round its orbit | 16.69 days |
| One spin | 16.69 days |
| Temperature | −140 °C |
| Also found there | water, rock |
Show Callisto in the model
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