NASA/JPL DE405 Astronomical Ephemerides

This Section Contains Some Basic Astronomical Ephemerides Of Planetary Positions
Based On the NASA/JPL DE405 Solar System Model.

The DE405 (Development Ephemeris Version 405) is one of several versions of various mathematical models of the solar system used in the planning of NASA space missions.  It was developed over several years by the JPL (Jet Propulsion Laboratory) with NASA and is used to compute the high-precision coordinates of several solar system bodies in space at any given moment over extended periods.  The DE405 is the basis of the annual Astronomical Almanac published by the U.S. Naval Observatory.

For more information on the JPL Development Ephemeris, see this Wiki-Ref:
 http://en.wikipedia.org/wiki/Jet_Propulsion_Laboratory_Development_Ephemeris 


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