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Asteroid Watch

Comet 67P from 1,200 Miles Away

Rosetta's Comet: Imaging the Coma


A distinct coma surrounds Comet 67P/Churyumov-Gerasimenko as seen from Rosetta.


› Read more (July 31, 2014)


Recent News


This graphic depicts the orbit of comet C/2013 A1 Siding Spring NASA Mars Spacecraft Prepare for Close Comet Flyby

NASA is taking steps to protect its Mars orbiters, while preserving opportunities to gather valuable science, as Comet C/2013 A1 Siding Spring nears Mars on Oct. 19.


Read more (July 25, 2014)


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)


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)



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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