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jpl_planets
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jpl_planets
orbital elements from http://ssd.jpl.nasa.gov/elem_planets.html
"Mean orbit solutions from a 250 yr. least squares fit of the
DE200 planetarty ephemeris to a Keplerian orbit where each element
is allowed to vary linearly with time. This solution fits the
terrestrial planets to 25" or better, but achieves only 600" for
Saturn. Elements are referenced to mean ecliptic and equinox
of J2000 at the J2000 epoch (2451545.0 JD)."
J2000 = 2000 January 1.5
WARNING: these elements are 1.5 JD later than sch_planets
definitions:
argument of perihelion = longitude of perihelion -
longitude of ascending node
mean anomaly = mean longitude - longitude of perihelion
1 Julian century = 36525 days
keyword, defined at i/kepler.i line 434
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