The orbit of Neptune around the sun is about 164.79 earth years.
The wording of the question might simply be an error; planetary orbits around the sun are almost always the orbits of interest. But in fact Neptune does orbit the earth, if there is no requirement that an orbit has to directly involve the gravitational force between the two bodies involved. Whenever Neptune completes an orbit around the sun, it has effectively orbited all the other planets closer to the sun than it is. You could make the length of this event a little more accurate if you start and end with the same phases of Neptune from earth's perspective that give a total time closest to Neptune's orbital period. So Neptune's orbit of earth will be an exact multiple of Neptune's synodic period relative to earth, which is 367.49 days.
2.5 months. Collusion is set for Earth on 7/21/12
it take Triton about 6 days to orbit Neptune
It takes Neptune around 165 years to complete one orbit around the sun.
One year on Neptune is 165 years on Earth.
Neptune's orbit takes 125 years to get around the sun.
One year on Neptune is 164.79 earth years. So, a decade would be ten times as much, or 1647.9 earth years.
164.8 Earth Years
Nobody actually knows how long it took for Neptune to form because it is so far away. We can not take samples to test how old the rocks are either because our equipmen can't make it through the methane atmosphere.
It takes Neptune about 164.8 Earth years to complete one orbit around the Sun.
It takes 165 Earth years for Neptune to go around the sun.It takes 16 Earth hours to have a full day.
One orbit of Neptune around the sun takes about 164.79 earth years. Since its discovery in the mid-1840s it took until 2010 to complete one orbit.
The rotation period of Neptune is 16.1 earth hours.