[Video] Asteroid 2012 DA14 to pass close by Earth tonight

Saturday, February 16, 2013
Artists concept of asteroid 2012 DA14 [Image Credit: NASA]
Washington: New images obtained by various optical observatories worldwide show asteroid 2014 DA14 on its way to a record-close approach to Earth on Friday.

DA14 is the largest known object of its size to pass this close. Scientists have ruled out any impact of this rare celestial incident.

The graphic demonstrates why the asteroid is invisible to northern hemisphere observers until just before 
close approach: it is approaching from "underneath" our planet [Image Credit: NASA/ JPL-Caltech]
Asteroid 2012 DA14 is about 150 feet (45 meters) in diameter. It is expected to fly about 17,200 miles (27,000 kilometers) above Earth's surface at the time of closest approach, which is about 19.40 GMT (1.10 IST) Feb 15-16. It will not be visible with naked eyes but can be seen using binoculars in clear sky conditions.

Graphic depicts the trajectory of asteroid 2012 DA14 on Feb 15, 2013. In this view, we 
are looking down from above Earth's north pole [Image credit: NASA/JPL-Caltech]
One image, taken by amateur astronomer Dave Herald of Murrumbateman, Australia, on Thursday, shows the asteroid as a tiny white dot in the field of view.

Another set of animated images, obtained by the Faulkes Telescope South in Siding Springs, Australia, on Feb. 14, and animated by the Remanzacco Observatory in Italy, shows the asteroid as a bright spot moving across the night sky.

These are some of many images that may be taken of the asteroid during its close - but safe - encounter with Earth. It will be observed by numerous optical observatories worldwide in an attempt to determine its rough shape, spin rate and composition.

NASA scientists will use NASA's Goldstone Solar System Radar, located in California's Mojave Desert, to take radar images of the asteroid to determine its precise size and shape on Feb. 16, 18, 19 and 20. The NASA Near Earth Object Observation (NEOO) Program will continue to track the asteroid and predict its future orbit.

This distance is well away from Earth and the swarm of low Earth-orbiting satellites, including the International Space Station, but it is inside the belt of satellites in geostationary orbit (about 22,200 miles, or 35,800 kilometers, above Earth's surface.) The flyby of 2012 DA14 is the closest-ever predicted approach to Earth for an object this large.

The NASA Near Earth Object Observation (NEOO) Program detects and tracks asteroids and comets passing close to Earth using ground- and space-based telescopes. The network of projects supported by this 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.
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