December 11-12, 2010 radiolocation was carried out of the moderately large near-Earth asteroid 2010 JL33 using the Goldstone radio telescope of the Deep Space Network (Goldstone Solar System Radar). The asteroid was discovered May 6 of last year at Mt Lemmon Observatory, and it belongs to the class of potentially hazardous objects (PHA). Radiolocation helped to determine the size and shape of the heavenly body which you can see in the illustration at left.

The form of the asteroid is slightly extended, with length on the order of 1.8 km (1.1 mile). The period of rotation on its axis is 9 hours. The most interesting detail on the surface of the asteroid is a large crater, perhaps of impact origin.

At the moment of location, the asteroid was 8.5 million km from the Earth. Although it is bright enough, optical observations were hampered by the fact that 2010 JL33 had the Milky Way in the background the whole time. The observations are another success for the team of American radio astronomers conducting regular observations on the Goldstone and Arecibo radio telescopes.

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