If Asteroid 2024 YR4 crashes into the Moon, it would create a crater more than half a mile in diameter (1 km), becoming the largest impact in about 5,000 years, according to the study.

The collision could create an impact crater on the moon estimated at 1 kilometer wide (0.6 miles wide), Wiegert said — about the size of Meteor Crater in Arizona, Rivkin added.