101955 Bennu is a carbonaceous asteroid in the Apollo group discovered by the LINEAR Project on 11 September 1999. It is a potentially hazardous object that is listed on the Sentry Risk Table with the second-highest cumulative rating on the Palermo Technical Impact Hazard Scale.

Radius: 900′

Mass: 78 billion kg

Orbital period: 438 days

Orbits: Sun

Proper orbital period: 1.19548 yr; (436.649 d)

Did you know: Every six years, it comes close to Earth.