On Sun, 28 Jul 2002, David Weinshenker wrote:
> > BTW, this kind of flyby would be a great simulator of the ability to
> > deflect an asteroid in the time between discovery and impact...
>
> Also a useful procedure in any case, to refine trajectory data on
> objects of suspected potential risk?
Alas, trajectory refinement really is better done from the ground, except
for the case where you're actually making rendezvous with the asteroid.
(Spacecraft tracking can be far more precise than any sort of astronomical
observations, but that's useful mainly if the spacecraft is actually
accompanying the asteroid. The positional data you'd get from a flyby is
not that helpful -- ground-based radar will do better.)
Henry Spencer
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