The Heliocentric Osculating Orbital Elements referred to the mean ecliptic and equinox of
date were removed from The Astronomical Almanac beginning with the 2008 edition. They
are now available only on this website.
The orbital elements for the Earth refer to the Earth/Moon barycenter. The coordinates are
in astronomical units. Linear interpolation of these orbital elements usually lead to errors
of about 1 or 2 arcseconds in the geocentric positions of the Sun and planets. The errors
may however reach about 7 arcseconds for Venus at inferior conjunction and about 3 arcseconds
for Mars at opposition.