Bennu

Bennu is a small, near-Earth asteroid that passes relatively close to Earth about every six years. It was the target of NASA's OSIRIS-REx mission to collect an asteroid sample and bring it to Earth.

Closeup view of a rocky, diamond-shaped asteroid in space

Facts About Bennu

Bennu is a carbon-rich asteroid that is about one-third of a mile wide at its equator.

Bennu may have broken off from a much larger carbon-rich asteroid about 700 million to 2 billion years ago. It likely formed in the main asteroid belt between Mars and Jupiter, and has drifted much closer 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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NASA's OSIRIS-REx spacecraft photographed these boulders on asteroid Bennu.
NASA

Exploring Bennu

Bennu was the target of NASA's first asteroid sample return mission – OSIRIS-REx.

NASA's OSIRIS-REx spacecraft launched to Bennu on Sept. 8, 2016, to collect a sample. After is successfully delivered the sample to Earth on Sept. 24, 2023, the OSIRIS-REx Sample Analysis Team found that Bennu contains the original ingredients that formed our solar system. The sample also had a few surprises.

Explore Bennu
Black, top-shaped sample return capsule sits on the desert ground with flags surrounding it.
The sample return capsule from NASA’s OSIRIS-REx mission is seen shortly after touching down in the desert on Sept. 24, 2023, at the Department of Defense's Utah Test and Training Range.
NASA/Keegan Barber

Bennu Multimedia

Explore this page for resources about asteroid Bennu.

Get images, posters, videos, models and more about asteroid Bennu and the OSIRIS-REx mission.

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Wedge-shaped silver metal container holding dark gray and black rocks and regolith
One of the containers holding rocks and dust from asteroid Bennu.
NASA/Erika Blumenfeld and Joseph Aebersold
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