is a lost asteroid with a short observation arc of 1.2 days that cannot be recovered with targeted observations and awaits serendipitous survey observations. It has a poorly constrained orbit and has not been seen since 2007. It was first observed on 20 March 2007 when the asteroid was estimated to be from Earth and had a solar elongation of 107 degrees. is the fourth largest asteroid with better than a 1-in-2 million cumulative chance of impacting Earth after (29075) 1950 DA, 1979 XB, and 101955 Bennu. With a cumulative Palermo Technical Impact Hazard Scale of –3.06, the poorly known orbit and assumed size place eighth on an unconstrained listing of the Sentry Risk Table.
Potential impacts Possible impacts were projected for 2 October 2013, 3 October 2019, and 3 October 2024. Since the asteroid has a short observation arc and the uncertainty in the orbit of the asteroid intersects Earth's orbit, simulations could not rule out the asteroid and Earth being at the same point in space on any of those dates. None of these impacts happened, nor was the asteroid detected near those dates.
+Potential impacts (past and future) Date Impactprobability(1 in) JPL Horizonsnominal geocentricdistance (AU) NEODySnominal geocentricdistance (AU) MPCnominal geocentricdistance (AU) Find_Orbnominal geocentricdistance (AU) uncertaintyregion2013-10-02 1.9 billion 2019-10-03 11 million 2024-10-03 11 million
See also 1979 XB
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