On Friday astronomer said they had identified a suspected asteroid that had a 1 in 500 chance of hitting the Earth in 2030, but today they apparently downgraded the risk saying that the object would actually miss the Earth by about 3 million miles and was no longer considered a serious threat.
After 2030, though, the picture might not be so rosey. For a 2071 flyby the risks of a collision could be as high as 1 in 1,000.
And just so you know how little we know about near earth asteroids — nobody’s even sure the object really is an asteroid. There’s apparently some suspicion that it might just be an Apollo-era booster rocket!
Information on the original announcement can be found in the IAU Technical Review Team Assessment on Asteroid 2000 SG344, and a followup news story on MSNBC, Asteroid threat downgraded sums up the aftermath, including a stinging e-mail message from a scientist wondering why the IAU went public so early on such flimsy evidence.