Asteroid 2024 YR4's Potential Lunar Impact in 2032: Updated Probabilities and Implications
Recent observations have refined the trajectory of asteroid 2024 YR4, indicating a 4.3% chance of it impacting the Moon on December 22, 2032, while confirming no threat to Earth.
Asteroid 2024 YR4, discovered on December 27, 2024, has been the subject of extensive observation due to its initial potential threat to Earth. Early calculations suggested a 3% chance of Earth impact in 2032, but subsequent data collection has effectively ruled out this risk. The European Space Agency (ESA) now estimates the probability of Earth impact at 0.001%, and NASA at 0.0017%.
Attention has shifted to the Moon, with current analyses indicating a 4.3% chance of asteroid 2024 YR4 impacting the lunar surface on December 22, 2032. This update follows observations from NASA's James Webb Space Telescope, which refined the asteroid's trajectory and size estimates. The asteroid is now estimated to be between 174 and 220 feet (53 to 67 meters) in diameter.
If the asteroid were to collide with the Moon, it would create a crater approximately 0.6 miles (1 kilometer) wide. The impact would likely be visible from Earth, producing a flash as bright as Venus in the night sky. Richard Moissl, head of ESA's Planetary Defence Office, noted, "It is a very rare event for an asteroid this large to impact the Moon."
The potential impact could also eject debris into space, some of which might reach Earth, resulting in meteor showers days after the collision. However, the majority of this material would burn up upon entering Earth's atmosphere, posing minimal risk.
Further observations are planned when the asteroid becomes visible again in June 2028. These will help refine its trajectory and impact probabilities. In the meantime, space agencies continue to monitor 2024 YR4 as part of ongoing planetary defense efforts.