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2024 YR4

When asteroid 2024 YR4 was first discovered, it was thought the asteroid had a very small chance of impacting Earth on Dec. 22, 2032. After more observations, NASA has concluded the object poses no significant impact risk to Earth in 2032 and beyond.

image of asteroid 2024 YR4

What We Know About This Asteroid

Asteroid 2024 YR4 is a near-Earth asteroid.

When asteroid 2024 YR4 was discovered, it was estimated to have a very small chance of impacting Earth impact on Dec. 22, 2032. After more observations, NASA concluded it poses no significant impact risk to Earth in 2032 and beyond.

Get the Facts
A split image with a large box on the left and two smaller ones stacked on the right. The image on the left has a black starfield a several colorful dots indicating objects in space. Each of the two smaller boxes has one smudged reddish dot indicating an asteroid.
On March 26, 2025, NASA’s James Webb Space Telescope captured images of asteroid 2024 YR4 that indicate the asteroid is about the size of a 15-story building.
NASA, ESA, CSA, STScI, Andy Rivkin (APL)

Webb telescope imaged the asteroid in infrared light.

Webb images indicate the asteroid is about the size of a 15-story building.

Learn More

March 26, 2025

Webb Finds Asteroid 2024 YR4 is Building-Sized

A split image with a large box on the left and two smaller ones stacked on the right. The image on the left has a black starfield a several colorful dots indicating objects in space. Each of the two smaller boxes has one smudged reddish dot indicating an asteroid.

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Related Links

Image of asteroid 2024 YR4

CNEOS

2024 YR4 FAQ on the Center for Near Earth Object Studies

Planetary Defense Coordination Office shield

Planetary Defense

NASA's Planetary Defense Blog

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Earth Impact Monitoring

NASA Sentry information on 2024 YR4

Asteroid 2024 YR4

Minor Planet Center

Entry page for 2024 YR4

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