If your asking how long the day is, then it is 16.11hr., if your asking the length of the year, then 60190 days.
"it takes 20 earth days to reach neptune from earth"
60,190.03 Earth days (164.79 Earth years) (89,666 Neptune days)
Neptune orbits the sun, not Earth. Its orbital period is 60,182 Earth days, or about 165 Earth years.
One orbit for Neptune takes nearly 165 Earth years (164.79 years). This is approximately 60,190 Earth days. But a day (complete rotation) for Neptune is much shorter than Earth's, about 16 Earth hours. So there are about 89,666 "Neptune days" in a "Neptune year".
The rotation of the planet Neptune is much faster than Earth's. It completes a rotational "day" in about 16 Earth hours. So in an Earth year (365.25 Earth days), Neptune completes about 544 Neptune days. In a Neptune year, there are about 89,666 Neptune days.
58
60225 earth days = one year on Neptune
16 hours or 0.67125 earth days
I'm not sure how many days in one of Neptune years but one of Neptune's days is 16 hours and 7 minutes long. And one year is 165 earth years so 365 x 165 = 60225 earth days in one Neptune year.
It takes roughly 6.4 Earth days for Neptune to rotate on it's axis.
it's actually 1 sec on earth
60182 earth days.