56 days
A long time.
The sun does not orbit itself!
It takes Mars 1.9 Earth years to orbit around the Sun.
About three months.
29 days
it take Triton about 6 days to orbit Neptune
One orbit around the Sun is what determines what one year is. Your answer is, "one year".
it take a year which is 365 days
Mercury has no moons.
87.9691 Earth days.
a year obviously
164.8 Earth years