Re: One package, but more than a single probe . . .
One good ping from Arecibo and you can get doppler info on orbit and rotation (from dispersion of returning pulse). This info, a copy of Mathematica and some continual observations to account for chaos (recombinant measurement and prediction errors) and we could predict where this think will be with a high degree of accuracy 5 years into the future.
Heck, Tycho Brahe could probably've done it if he knew about Lagrange and Hamilton.
Although, the beacon would be alot cooler....and more democratic. If the signal were strong enough, one could keep tabs on it with help from the SETI League or hard core hams.