It takes 85 hours 3½ Earth days for Europa to rotate on its axis. It also takes 85 hours for Europa to complete one orbit around Jupiter.
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Eris takes approximately 550 Earth years to rotate on its axis.
About 28 days.
365 and 1 to 4 days
16.11 hours.
It takes about 59 Earth days for Mercury to rotate once on its own axis, so in 1 day on Mercury, it rotates only a fraction of its total rotation.