Spaceflight Now: Breaking News

NASA probe finds signs of the times on asteroid Eros
JHU/APL PHOTO RELEASE
Posted: April 20, 2000

Eros
Eros. Photo: JHU/APL
 
NEAR Shoemaker's investigation of Eros from low altitude orbit continues to bring the asteroid's history into sharper focus. This pair of images, taken April 18, 2000, from an orbital height of 99 kilometers (61 miles), shows the dissimilarity of two different regions of the asteroid. The left panel shows a region typical of Eros, whereas the right panel shows the inside of the saddle. As the images show, the saddle region has far fewer craters.

Craters are formed by the explosive impacts of asteroid fragments that have rained onto the surface over the eons. A freshly exposed surface will have fewer craters than a surface exposed to space for a longer time. The lesser number of craters in the saddle shows that it has been wiped clean, or "resurfaced," by geologic processes relatively late in Eros' history.

Built and managed by The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, NEAR-Shoemaker was the first spacecraft launched in NASA's Discovery Program of low-cost, small-scale planetary missions.

Earlier coverage
Space probe gets up close and personal with asteroid

Back in the asteroid saddle again

The impact of sun at high noon

NEAR Shoemaker moves even closer to asteroid Eros



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