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20 years
16.68 days
2 1/2 years
16.7 earth days
16.7 earth days
about 20 years unless you stop for dinks
Since Callisto is a moon of Jupiter, it orbits the Sun together with Jupiter - and takes just as long as Jupiter to orbit the Sun.
A year on Callisto is 10.5 Earth months.
A long time, possibly 50 billion years.
A night on Callisto is 8.35 days since a full day (including night) is 16.7 Earth days long.
Not enough information. Such "how long does it take" questions depend on the speed. You need to know that speed, or assume some speed, then divide the distance by the speed.
50 YRS No. A day on Callisto is the same as it's year; 16.6890184 earth days.