NASA Captures New Images of Large Asteroid Passing Earth

This radar image of asteroid 2005 YU55 was obtained on Nov. 7, 2011, at 11:45 a.m. PST This radar image of asteroid 2005 YU55 was obtained on Nov. 7, 2011, at 11:45 a.m. PST (2:45 p.m. EST/1945 UTC), when the space rock was at 3.6 lunar distances, which is about 860,000 miles, or 1.38 million kilometers, from Earth. Credit: NASA/JPL-Caltech
› Full image and caption
  • submit to reddit

November 07, 2011

PASADENA, Calif. -- NASA's Deep Space Network antenna in Goldstone, Calif. has captured new radar images of Asteroid 2005 YU55 passing close to Earth.

The asteroid will safely fly past our planet slightly closer than the moon's orbit on Nov. 8. The last time a space rock this large came as close to Earth was in 1976, although astronomers did not know about the flyby at the time. The next known approach of an asteroid this size will be in 2028.

The image was taken on Nov. 7 at 11:45 a.m. PST (2:45 p.m. EST/1945 UTC), when the asteroid was approximately 860,000 miles (1.38 million kilometers) away from Earth. Tracking of the aircraft carrier-sized asteroid began at Goldstone at 9:30 a.m. PDT on Nov. 4 with the 230-foot-wide (70-meter) antenna and lasted about two hours, with an additional four hours of tracking planned each day from Nov. 6 - 10.

Radar observations from the Arecibo Planetary Radar Facility in Puerto Rico will begin Nov. 8, the same day the asteroid will make its closest approach to Earth at 3:28 p.m. PST (6:28 p.m. EST/1128 UTC).

The trajectory of asteroid 2005 YU55 is well understood. At the point of closest approach, it will be no closer than 201,900 miles (324,900 kilometers) as measured from the center of Earth.  The gravitational influence of the asteroid will have no detectable effect on Earth, including tides and tectonic plates. Although the asteroid is in an orbit that regularly brings it to the vicinity of Earth, Venus and Mars, the 2011 encounter with Earth is the closest it has come 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 at NASA's Jet Propulsion Laboratory in Pasadena, Calif., commonly called "Spaceguard," discovers these objects, characterizes some 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.

The new radar images are online at:
http://www.nasa.gov/mission_pages/asteroids/multimedia/yu55-20111107.html .

For more information about asteroids and near-Earth objects, visit: http://www.jpl.nasa.gov/asteroidwatch .

More information about asteroid radar research is available online at: http://echo.jpl.nasa.gov/  .

For more information about NASA's Deep Space Network, visit: http://deepspace.jpl.nasa.gov/dsn .

DC Agle 818-393-9011
Jet Propulsion Laboratory, Pasadena, Calif.
agle@jpl.nasa.gov 

Dwayne Brown 202-358-1726
NASA Headquarters, Washington
dwayne.c.brown@nasa.gov
2011-343



Conceptual illustration of the subduction process Scientists Find Evidence of 'Diving' Tectonic Plates on Europa

› Read more

Asteroid 2014 Earth Flyby Small Asteroid to Safely Pass Close to Earth Sunday

› Read more

Bright Outburst on Io A Hellacious Two Weeks on Jupiter's Moon Io

› Read more


Get JPL Updates
Sign Up for JPL UpdatesRegister today and receive up-to-the-minute e-mail alerts delivered directly to your inbox.
Sign Up for JPL Updates