What is Neptune's perihelion and aphelion?

1 Answer
A. S. Adikesavan
Mar 11, 2016

4444.5 Million km and 4545.7 Million KM

Explanation:

Semi-major axis of Neptune's orbit a = 4495.1 Million km. Eccentricity of the orbit e = 0.011257, nearly.

Reference: NASA Planetary Fact Sheet.
Some other sources might give data differing slightly, in the least significant digits (lsd)..

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