Naptune would first have to be discovered before its orbit can be determined.
26.45 years
Mercury's orbit of the sun take 88 Earth days so 0.24 Earth years
Neptune takes approximately 164.8 Earth years to orbit the sun.
76 years.
It is about365
Jupiter takes 11.8618 Earth years to orbit the sun once
2,537 years
One.
about a many days and years...
12,345,678,910 years
1
About 248 years.