NASA's Goldstone Solar System Radar, located near Barstow, California, captured the rotation of asteroid 2010 JL33 -- an irregular, elongated object roughly 1.8 kilometers (1.1) miles wide. The radar observations were made December 11-12, 2010, as the asteroid safely passed Earth at a distance of 8.5 million km (5.3 million miles) . The video consists of 36 individual frames.
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