I added the full JPL DE406 ephemeris data to FIND_ORB as you
outlined in a previous post. That should make it good for the
period -3000 to +3000. I notice, however, that if I try to set the
epoch in FIND_ORB to any date before 1600 it just seems to ignore it
and use a date closer to that of the observations. This is probably
academic as I don't think it likely that anyone really needs
asteroid elements set to an epoch before 1600. Just wondered if
there is a way to get it to work. Thanks.