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Celestial Billiards Threaten Hit in 2880

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Science  05 Apr 2002:
Vol. 296, Issue 5565, pp. 27
DOI: 10.1126/science.296.5565.27a

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Summary

On page 132 of this issue, a team of researchers reports that the 1-kilometer asteroid 1950 DA has up to a 1-in-300 chance of clobbering Earth with a 10,000-megaton punch on 16 March 2880. But a pivotal uncertainty is how the asteroid spins.