Bennu is a carbon-rich asteroid that is about one-third of a mile wide and has a diameter of about 500 meters. It orbits the sun every 1.2 years and comes close to Earth every six years. These close encounters make it likely that Bennu will impact Earth in the late 22nd century. However, models of Bennu's and Earth's orbital trajectories show that the paths of the two bodies might intersect in 2182, with an impact probability of 1 in 2,700