Bennu was discovered on 11 September 1999. It has a mean diameter of 490 meters and a mass of over 78 billion kilograms. Earlier it was estimated that between 2175 and 2199. There are 1 in 2700 chances of Bennu hitting Earth but the new data reduces this number even more.

In year 2135, Bennu will come within 125,000 miles around half the distance of Earth to the moon causing a phenomenon called 'gravitational keyhole'. This could bring Bennu even closer to Earth and cause an impact 50 years after year 2135.

NASA has revised the chances of Bennu hitting Earth. Now there are 1 in 1750 chances of Bennu impact. However these chances are for between 2021 and 2300. By then we would have better understanding of asteroids and we might be able to change their direction.

UNIVERSE SIZE COMPARISON!
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