Dec 29, 2007

Asteroid to hit Mars: Chance increases


The chance of a football field-sized asteroid plowing into Mars next month has been increased to 4 percent, NASA scientists said on Friday after analyzing some data.

"I think it'll be cool," said Don Yeomans, who heads the Near-Earth Object Program at NASA's Jet Propulsion Laboratory. "Usually when an asteroid is headed toward Earth, I'm not rooting for an impact."

The space rock, known as the nondescript 2007 WD5, was discovered in late November by the NASA-funded Catalina Sky Survey in Arizona. Based on the latest information available, scientists said last week there was a 1-in-75 chance the asteroid could hit Mars on Jan. 30.

The odds were increased to 1-in-25 this week after a Ph.D. student pored through the archives and plotted the asteroid's motions before its official discovery. The new information allowed scientists to improve their calculations of the asteroid's orbit and flight path.

Still, the asteroid poses no threat to Earth and is closing in on the Red Planet at 27,900 mph. The collision would likely blast a half-mile-wide crater north of where the rover Opportunity has been exploring since 2004. Link

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