Current estimates are based on observation of only a small fraction of a single orbit, and thus are "speculative" at best.

The scientists who presented information on this object at a recent meeting warned against "premature alarm," and a fair percentage of the others at that particular conference essentially said "who cares, until there's better data."

It's reassuring that somebody is watching such things, although their assurances that there's "plenty of time" to make plans to deflect it after better information is available aren't as heart warming as they might be if anyone had figured out just how you might do that. (There's little agreement on what kind of plans could/should be made.)

Massive budget cuts for current space programs (they are real) also don't make some of us very confident that we'll have the hardware for such a program if the need happens to creep up on us. (But maybe that was one of the points the presenters had in mind?)

John