NASA Releases Updated Radar Movie of Asteroid 2005 YU55
NASA Scientists working with the Deep Space Network antenna at Goldstone, Calif., have released a second, longer, more refined movie clip of asteroid 2005 YU55.
PASADENA, Calif. - NASA Scientists working with the 230-foot-wide  (70-meter) Deep Space Network antenna at Goldstone, Calif., have released a second,  longer, and more refined, movie clip of asteroid 2005 YU55. The images were  generated from data collected at Goldstone on Nov. 7, 2011, between 11:24 a.m.  and 1:35 p.m. PST (2:24 p.m. and 4:35 p.m. EST).The movie clip can be found at:http://1.usa.gov/YU55.Each of the 28 frames required 20 minutes of data  collection by the Goldstone radar. At the time of the observations, 2005 YU55  was approximately 860,000 miles (1.4 million kilometers) from Earth. The resolution  is about 13 feet (4 meters) per pixel. 2005 YU55 takes approximately 18 hours  to complete one rotation, so the rotation in the movie appears much more rapid  than the actual asteroid rotation speed.The Goldstone observations utilized a new system to  obtain images with a resolution of 4 meters, which is five times finer than the  highest resolution previously possible at Goldstone."The encounter with 2005 YU55 has  produced an enormous amount of data that is still being processed." said radar  astronomer Lance Benner, the principal investigator for the 2005 YU55 Goldstone  observations, from NASA's Jet Propulsion Laboratory in Pasadena, Calif. "The  sequence of images we obtained shows unprecedented fine-scale detail on this  asteroid, which is comparable in size to the Empire State Building.  The Goldstone images show evidence for  concavities, a ridge near the asteroid's equator, and numerous features that  may be large boulders."The trajectory of asteroid 2005 YU55 is well  understood. Although the asteroid is in an orbit that regularly brings it to  the vicinity of Earth, (and Venus and Mars), 2005 YU55's 2011 encounter with  Earth was the closest for at least the last 200 years.NASA detects, tracks and characterizes asteroids and  comets passing close to Earth using both ground- and space-based telescopes.  The Near-Earth Object Observations Program, commonly called  "Spaceguard," discovers these objects, characterizes a subset of  them, and plots their orbits to determine if any could be potentially hazardous  to our planet.JPL manages the Near-Earth Object Program Office for NASA's Science Mission  Directorate in Washington. JPL is a division of the California Institute of  Technology in Pasadena.More information about asteroids and near-Earth objects is at:http://www.jpl.nasa.gov/asteroidwatchand via Twitter athttp://ww.twitter.com/asteroidwatch.  More information about asteroid radar  research is at:http://echo.jpl.nasa.gov/. More information about the Deep Space Network is at:http://deepspace.jpl.nasa.gov/dsn.