It takes roughly 6.4 Earth days for Neptune to rotate on it's axis.
Neptune takes 16 hours 6 minutes and 36 seconds to rotate or spin once on its axis, or 0.67125 Earth days.
IT TAKES THE EARTH 360 DAYS TO ROTATE. it actually takes 365 days to orbit the sun and 23 hours 55 min to rotate on its axis
The Moon revolves round the Earth and rotates on its own axis once every 27.3 days.
31.
Neptune takes about 165 Earth years to orbit the Sun. That's one Neptune "year" of course. Neptune's "day" is about 16 hours and 6 minutes ( 16.1 hours). That's the time it takes to spin on its axis once. From that you can work out how many Neptune days the orbit takes, if you want. I make it to be about 89838 "Neptune days". You can say Neptune "year" and Neptune "day", but the terms "week" and "month" are normally only used for planet Earth. Also when I've used "hour" in this answer I mean an Earth hour. This is normal in books on astronomy.
Neptune takes 16 hours 6 minutes and 36 seconds to rotate or spin once on its axis, or 0.67125 Earth days.
It takes 58 days for mercury to rotate on its axis.
628 days.
about 63 earth days
About .997 days per full earth rotation on its own axis.
About 27.3 days.
234 years
153.3 hours
0.345, it takes the sun 27 days to rotate on its axis once.
Mars rotates on its axis in 24.6 earth hours = 1.025 earth days.
it takes 24 hours
About 24 hours 37 minutes.