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Ephemeris Calculator

Compute Neptune ephemerides for any date and time between 01 Jan 1900 and 01 Jan 2100 and display the predicted position in an interactive sky map.

Time: : UTC

How Far is Neptune from Earth?

The distance of Neptune from Earth is currently 4,380,255,480 kilometers, equivalent to 29.280199 Astronomical Units. Light takes 4 hours, 3 minutes and 30.9596 seconds to travel from Neptune and arrive to us.

4,380,255,480
29.280199
4 hours, 3 minutes and 30.9596 seconds

The following chart shows the distance of Neptune from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Neptune from Earth between January 1900 and January 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of Neptune from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Neptune to Earth

Between January 1900 and January 2100 the closest approach of Neptune to Earth happens on Tue Oct 29 2041 at a distance of 28.81417197 Astronomical Units, or 4,310,538,781 kilometers:

Tue Oct 29 2041
4,310,538,781
28.814172

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

See Also