NASA says while there is a risk, there is an 'extremely small chance' Bennu will hit Earth on September 24, 2182.

With the date falling near the end of the 22nd century, we don't have to worry for a good while yet too.

Bennu is around a third of a mile wide which makes it half the size of the asteroid that is thought to have killed dinosaurs. If Bennu crashes into Earth, it will cause devastation 600 miles from the crash site, but it's not large enough to cause worldwide extinction.