How many miles is Bennu?
The new study finds that in 2135, Bennu will come within about 123,000 miles of Earth’s surface, give or take 6,000 miles, a much more precise range than previous estimates.
How big is the asteroid Bennu compared to Earth?
Bennu is a B-type asteroid with a ~500 meter diameter. It completes an orbit around the Sun every 436.604 days (1.2 years) and every 6 years comes very close to Earth, within 0.002 AU. These close encounters give Bennu a high probability of impacting Earth in the late 22nd century.
