While the University of Arizona-led OSIRIS-REx mission studied and sampled the asteroid Bennu, it was also helping scientists calculate if — or when — the half-kilometer body will one day slam into the Earth.
Their findings appear in the journal Icarus.
Sept. 24, 2182: In the next 300 years, that’s when Bennu has the best chance of striking Earth: roughly .05%.
To figure that out, the team accounted for everything from hundreds of gravitational nudges to minute thrusts from surface heating and particle ejection.
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