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NASA Science [1]

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Date: 2018-07-12 17:23:20-04:00

About Bennu

Bennu is about one-third of a mile wide at its equator.

The rocks Bennu is made of formed nearly 4.6 billion years ago on a primeval world that has since been destroyed by a giant collision. Bennu coalesced from a small portion of the leftover rubble about 1 to 2 billion years ago. It may have formed in the main asteroid belt between Mars and Jupiter, and drifted close to Earth since then. Bennu makes it closest approach to Earth every 6 years, coming within about 186,000 miles (299,000 kilometers) of our planet.

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[1] Url: https://science.nasa.gov/solar-system/asteroids/101955-bennu/

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