Scientists say it is quite unlikely and in fact, you can sleep well as the article reveals that "scientists have ruled out the chances of an Earth impact for all of these 784 large NEOs. Still, lesser objects also pose a risk, and researchers estimate more than 100 large NEOS remain to be found."
A few years ago, a book titled "The Black Swan" came out. No, it's not about swans that get singled out by the Cambridge Police Department for breaking into their own roosts, but about sudden, unpredictable events occurring far more often than we'd like to think. There are flocks of black swans out there.In 2008, science writer Gregg Easterbrook surveyed preparedness for a "space-object strike" for the Atlantic magazine. He found that even though serious experts believe there's as much as a 1-in-10 chance of a significant Earth-strike within the next century, NASA doesn't much care.