The Apothis asteroid is the one to be slightly concerned about, its orbit brings it close to the Earth in 2029 and close again in 2036, as more information is known about its orbit better predictions can be made.
The date it will be passing the Earth is a little worrying though, April 13th 2036, which just happens to be a Friday

but not to worry the chance of it hitting Earth is about 4 in a million so you stand a better chance of winning the X lotto!
http://search.nasa.gov/search/search.js ... s+asteriod" onclick="window.open(this.href);return false;