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Asteroid YR4

Kumari Sonali

Asteroid YR4:

On April 2, 2025, NASA announced that asteroid 2024 YR4 has a 3.8% probability of colliding with the Moon on December 22, 2032.

  • YR4 is a Near-Earth Asteroid (NEA) discovered in December 2024 using the ATLAS telescope in Chile.
  • Its orbit brings it within 1.3 times the Earth-Sun distance, making it a Near-Earth Object (NEO).
  • Initially, YR4 triggered the highest-ever NASA asteroid impact alert in February 2025.
  • New infrared data from the James Webb Space Telescope estimates its size at ~65 metres, comparable to a 10-storey building, which is below the 140-meter threshold for classification as a “Potentially Hazardous Asteroid”.
  • Earlier, YR4 had a 1% chance of hitting Earth, but the latest trajectory analysis shows a negligible risk to Earth.
  • Asteroids, also known as minor planets, are rocky remnants from the early solar system, dating back 6 billion years.
  • They exhibit irregular shapes, though a few are nearly spherical, and some host small companion moons or even exist as binary or triple systems.

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