2024 YR4 Facts
NASA Science Editorial Team
Asteroid 2024 YR4 is a near-Earth asteroid, meaning it is an asteroid in an orbit that brings it into Earth’s region of the solar system. When it was first discovered, it appeared to have a very small chance to impact Earth on Dec. 22, 2032. As observations of 2024 YR4 continued through early 2025, NASA concluded the object poses no significant impact risk to Earth in 2032 and beyond.
New infrared observations from NASA’s James Webb Space Telescope have decreased the uncertainty of the asteroid’s size, and 2024 YR4 is now estimated to be 174-220 feet (53-67 meters), about the size of a 15-story building. The previous size estimate of 131-295 feet (40-90 meters) was derived from visible light measurements from ground-based telescopes.
This object is of particular interest for planetary defense for two reasons:
1)
it is large enough to cause localized damage in the unlikely event that it should impact Earth, and
2)
it surpassed the 1% impact probability threshold to warrant formal notification of the object to other U.S. government agencies involved in planetary defense as well as to the Space Mission Planning Advisory Group and to the United Nations Office of Outer Space Affairs per the International Asteroid Warning Network’s notification charter.
As more observations of the asteroid’s orbit were obtained, its impact probability became better known and enabled planetary defense experts to determine it poses no significant risk to the planet.
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https://science.nasa.gov/solar-system/asteroids/2024-yr4-facts/
FAQ's discussed in this Video:
+ What are the chances it’ll hit Earth?
+ Why do those odds keep changing?
+ And should you be worried?
Producers: Scott Bednar, Jessie Wilde, Pedro Cota
https://science.nasa.gov/solar-system/asteroids/2024-yr4/