<< This particular object is no ?Armageddon? asteroid, however: Based on its brightness, astronomers are guessing that the object is 30 to 70 meters (yards) wide. The upper end of that range would put 2000 SG344 on the level of the Tunguska Meteorite, which flattened a wide swath of Siberian forest in 1908. That blast was thought to be the equivalent of 15 million tons of TNT ? compared with a 20,000-ton yield for the Hiroshima bomb.
?You certainly wouldn?t want to be at the impact point, because there?s a good chance it would make it through the atmosphere ? but at most we would have really local consequences,? said astronomer Paul Chodas of NASA?s Near-Earth Object Program office at the Jet Propulsion Laboratory in Pasadena, Calif. >>
guys it's just a small one. 30-70 meters wide?? Sure it will be a powerful explosion but the effects will only be local. It's not going to block out sunlight for 10 years..that's something a several mile wide asteroid would do. They would know exactly where it would hit and people could leave if it was a populated area. AND it's 30 years away. So who gives a sh!t now?