PlanEph

Planetary Ephemerides
A Dynamic Link Library (DLL) for Microsoft® Windows™
And also an Addin to use with Microsoft® Office™ Excel
Planetary Ephemerides implements several functions to get positions of major and minor planets and artificial satellites, using well known solutions developed and released by development centers as “Jet Propulsion Laboratory” (JPL), Institut De Mécanique Céleste Et De Calcul Des Éphémérides” (IMCCE) and “North American Aerospace Defense Command” (NORAD). It needs binary files to get JPL DEXXX ephemerides and IMCCE INPOPXX ephemerides. The library also implements VSOP87 ephemerides, which do not need any external files. It also implements SGP4/SDP4 ephemerides for artificial satellites, by calling the sgp4 function delivered by David A. Vallado. Positions of minor planets from its orbital elements. SOFA functions call.
WARNING: Excel Addin has become unreliable in Excel 2013 and above. Using it may cause unexpected results.

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