Astronomers have traced the origin of asteroid 2024 YR4, which appears to have broken off from a larger space rock.

YR4 is back in the spotlight. Brand new research has produced a better estimate of its size and orbit, which give it a 3.8 percent chance of hitting the Moon. Now a different group has looked at its orbital past,

The once-dubbed "city-killer" asteroid 2024 YR4 has surprised scientists with its 'unusual' shape as it rapidly rotates through space on a trajectory that could see it hit the moon.