Is this possible?

On Sat, 13 Sep 2003 18:53:51 +0000, thole wrote:

DE406 is a numerical integration that covers the time period from -3000
to +3000 and includes the Moon. While not an algorithm itself, one could
in principal develop an algorithm that fits the integration and then use
it to extrapolate back to -4712. Unfortunately, I know of nothing against
which you could test the accuracy of the extrapolation, but a 1700 year
extrapolation from a baseline of 6000 years isn't too bad. The biggest
problem might be the unknown value for the correction from the ephemeris
time variable (atomic time, a uniform time interval) to Earth time (UT,
for example, which is not uniform due to the tidal evolution of the
Earth's rotation rate).

Could you give me some links where I can learn about DE406?
I think it's worth pursuing.

Thanks much, tholen!