Using data from NASA's James Webb Space Telescope in February 2026, experts refined the orbit of what asteroid, ruling out its chance of lunar impact in December 2032?

Recent observations from NASA's James Webb Space Telescope (Deals) have provided crucial updates regarding the trajectory of a celestial body that once presented a slight, yet noteworthy, possibility of impacting the Moon. This particular object, an asteroid known as 2024 YR4, was initially identified in late 2024 and classified as an Apollo-type near-Earth object. Early orbital calculations indicated a small chance, around 4.3 percent, that it could strike the lunar surface on December 22, 2032. This raised concerns among astronomers, as even a lunar impact could have implications, potentially creating a visible crater and affecting orbiting satellites.

The James Webb Space Telescope became instrumental in resolving this uncertainty. In February 2026, specifically through observations on February 18 and 26, experts utilized the telescope's extraordinary sensitivity to track the extremely faint asteroid. At this time, 2024 YR4 was so distant that it reflected minimal light, making it nearly impossible for other observatories to accurately track. Webb's unique capabilities, including its Near-Infrared Camera, allowed for precise measurements of the asteroid's position against background stars.

These refined observations significantly narrowed the range of possible paths for 2024 YR4. The new data enabled scientists from NASA's Center for Near-Earth Object Studies to confidently rule out any chance of a lunar impact in December 2032. Instead, the asteroid is now expected to pass safely by the Moon at a considerable distance of approximately 21,200 kilometers (13,200 miles).

This successful tracking effort underscores the vital role of advanced space telescopes in planetary defense. By providing highly accurate orbital data for objects like 2024 YR4, telescopes such as the James Webb Space Telescope allow scientists to monitor potential threats and provide early, definitive assessments, ensuring the safety of both Earth and its celestial neighbor.