Source: https://ssd.jpl.nasa.gov/planets/approx_pos.html
Title: JPL approximate planetary positions
Selected source excerpts (not the complete document).

the elements are not valid outside the given time-interval over which they were fit.

Keplerian elements and their rates, with respect to the mean ecliptic and equinox of J2000, valid for the time-interval 1800 AD - 2050 AD.

EM Bary = Earth/Moon Barycenter

The former planet Pluto has also been removed.

given Julian ephemeris date, T\(_{\rm eph}\) (equivalent to the post-2006 IAU Barycentric Dynamical Timescale, JDTDB),
