NASA says Asteroid Bennu now more likely to hit Earth

NASA's Osiris-Rex spacecraft has provided new data indicating a higher chance of asteroid Bennu impacting Earth, with a 1 in 2700 chance on September 24, 2182. The spacecraft collected samples from Bennu and is returning to Earth. The potential impact could release energy equivalent to 1.1 billion tons of TNT. NASA's precise calculations, measuring Bennu's distance from Earth to within 7 feet, were achieved through data collected between 2019 and 2020.

What would be the energy impact of Bennu if it were to collide with Earth?

How does the precision of measuring Bennu's distance compare to measuring between famous landmarks?