Asteroid imaged, now less of a risk

NASA‘s Jet Propulsion Laboratory‘s Asteroid Watch has downgraded the danger from Asteroid 2005 YU55. Uncertainty in our knowledge of the 400 metre object meant there was a possibility that it could hit us. Now data gathered by the Arecibo Radar Telescope in Puerto Rico when the asteroid was 2.3 million kilometres away has provided both an image of the near spherical thing and information on its orbit that has reduced the uncertainty by a factor of 50% in such a way that rules out an impact within the next century.


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