The asteroid, 2010 TD54, will have its closest approach to earth's surface at an altitude of about 45,000 km at 6:50 a.m., Xinhua quoted NASA's Jet Propulsion Laboratory ( JPL) as saying Monday.
At that time, the asteroid will be over southeastern Asia in the vicinity of Singapore, the JPL said.
A telescope of the NASA-sponsored Catalina Sky Survey north of Tucson, Arizona discovered 2010 TD54 Oct 9 during routine monitoring of the skies.
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