jplephem Package supporting JPL planetary ephemeris computations
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Planetary JPL ephemeris

jplephem Description

jplephem lets you consult a Jet Propulsion Laboratory ephemeris for the position and velocity of one of the planets, or the magnitude and rate-of-change of the Earth's nutation or the Moon's libration. To determine the position of Mars using the DE421 ephemeris, for example, you would start by installing two packages:pip install jplephempip install de421Then you can compute positions using a script like this:import de421from jplephem import Ephemerise = Ephemeris(de421)jed = 2444391.5 # 1980.06.01print e.compute('mars', jed)The result should be a tuple providing the object's position in the Solar System given in kilometers, as well as its velocity in kilometers per second:(x, y, z, xrate, yrate, zrate)The ephemerides currently available as Python packages (the following links explain the differences between them) are:- DE405 (May 1997)- DE406 (May 1997)- DE421 (February 2008)- DE422 (September 2009)- DE423 (February 2010)Product's homepage

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