On Tue, 1 Nov 2011 14:02:28 -0700 (PDT), Brad Guth
wrote:

It's actually kind of dark, and it'll likely get very close to our
moon, though perhaps passing more above than along side. Of course
the only public shared data is from an old March 10th swag via JPL.
Let us all hope prey its trajectory hasn't shifted, because a lunar
impact would be extremely problematic for us.

The elements posted by JPL are current as of 2011-08-27. In any case,
this object will be a few hundred thousand kilometers from the Earth,
and there is nothing that could perturb the orbit of a body like this
enough to hit either the Moon or Earth in such a short time. And it's
doubtful that a body this size hitting the Moon would cause any
problems for the Earth at all.

This body is large enough to pick up easily with a backyard telescope-
calculate your own elements if you don't like the posted ones.