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During tracking, scientists will use the 34-meter, (110-foot), DSS 13 antenna at Goldstone to bounce radio waves off the asteroid. Radar echoes will in turn be collected by the National Radio Astronomy Observatory’s Green Bank Telescope in Green Bank, West Virginia, and the National Astronomy and Ionosphere Center’s Arecibo Observatory, Puerto Rico. NASA scientists hope to obtain radar images of the asteroid as sharp as about 7 feet, (2 meters), per pixel. This should reveal a wealth of detail about the object’s surface features, shape, dimensions and other physical properties.