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Asteroid Watch

Rotating Shape Model of Rosetta's Comet Target

Surface impressions of Rosetta's comet


Images of Rosetta's target comet resolve structures as small as 330 feet (100 meters) across.


› Read more (July 24, 2014)


Recent News


NEOWISE Spies Activity on Comet Catalina NEOWISE Spots a Comet That Looked Like an Asteroid

Comet C/2013 UQ4 (Catalina) was originally thought to be an asteroid, but observations by NASA's NEOWISE spacecraft indicate that it's a comet.


Read more (July 23, 2014)


Rosetta Mission's Destination: Comet 67P/Churnyumov-Gerasimenko Rosetta Spacecraft Approaching Twofold Comet

Comet 67P/Churyumov-Gerasimenko, destination of the European Space Agency's Rosetta mission, reveals a two-part shape.


Read more (July 17, 2014)


NASA's Galileo spacecraft captured these four views of Jupiter as the last of Comet Shoemaker-Levy 9's large fragments struck the planet. Looking Back at the Jupiter Crash 20 Years Later

Twenty years ago, space assets from NASA/JPL watched as the fragments of comet Shoemaker-Levy 9 made their historic plunge into the atmosphere of Jupiter.


Read more (July 15, 2014)



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Next Five Close Approaches



Average distance between Earth and the moon is about 239,000 miles (385,000 kilometers).

The Asteroid Watch Widget tracks asteroids and comets that will make relatively close approaches to Earth. The Widget displays the date of closest approach, approximate object diameter, relative size and distance from Earth for each encounter. The object's name is displayed by hovering over its encounter date. Clicking on the encounter date will display a Web page with details about that object.

The Widget displays the next five Earth approaches to within 4.6 million miles (7.5 million kilometers or 19.5 times the distance to the moon); an object larger than about 150 meters that can approach the Earth to within this distance is termed a potentially hazardous object.

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Archived Ustream Events

› NASA Follows 2012 DA14 Asteroid Flyby 02.15.13

› Asteroid 2012 DA14 Flyby Preview (teleconference) 02.07.13

› The Truth About 2012 - 12.08.11

› 2005 YU55 Q & A - 11.01.11

Featured Multimedia

NEOWISE Spies Comet Pan-STARRS Against Galaxy Backdrop NEOWISE Spies Comet Pan-STARRS Against Galaxy Backdrop

NASA's NEOWISE mission captured a series of infrared images of comet C/2012 K1 -- also referred to as comet Pan-STARRS -- as it swept across our skies in May 2014.


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Yeomans' Top 10

Don Yeomans Asteroid attack, mini-me, rich neighbors and more. Learn why these are cool asteroid factoids from JPL senior research scientist Don Yeomans.

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In-depth Information

› Near Earth Objects site for technical data

› Small Worlds