Overview

• Asteroid 2024 YR4, initially flagged as a potential Earth impact risk, has been confirmed to pose no significant threat in 2032 or beyond.
• The James Webb Space Telescope conducted detailed observations in March 2025, confirming the asteroid's size at 60 meters and unique thermal properties.
• Webb's data revealed the asteroid's fast spin and rocky surface, with a lack of fine-grained sand, distinguishing it from larger asteroids.
• This marks the smallest object ever targeted by Webb, providing critical insights for future asteroid monitoring and planetary defense efforts.
• A slight 2% chance of a lunar impact in 2032 remains under observation, while the findings contribute to global asteroid preparedness initiatives.