628 days.
It takes 58 days for mercury to rotate on its axis.
Mercury is weird. It circles the sun every 88 days, and takes 58.6 days to rotate once on its axis !That's 1,406 hours .
It takes roughly 6.4 Earth days for Neptune to rotate on it's axis.
To revolve around the sun, it takes 88 days. To rotate on its own axis, it takes 58.6 days. One rotation takes 175.97 Earth days
7.5
about 63 earth days
About .997 days per full earth rotation on its own axis.
About 27.3 days.
I believe it is 88 days.
234 years
153.3 hours
Neptune takes 16 hours 6 minutes and 36 seconds to rotate or spin once on its axis, or 0.67125 Earth days.