The Minor Planet Mailing List objects 2012TC4/2012 DA14 ..
Discussion
http://www.brera.mi.astro.it/sormano/teca.html
is 14959km a near miss?
http://tech.groups.yahoo.com/group/mpml/
Interesting group, if you like the thought of spotting "stuff" coming out way.
There is a lists of known impact craters/sites around the globe that interfaces with google earth in the files section.
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Mo.
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