Particle.news

Download on the App Store

Skyscraper-Size Asteroid 2025 FA22 Makes Safe Earth Flyby on Sept. 18

The encounter serves as a planetary-defense drill focused on precise orbit measurements.

Overview

  • NASA’s CNEOS and JPL track a closest approach of about 842,000 kilometers (523,000 miles), a little over twice the lunar distance.
  • FA22 is estimated at roughly 120–280 meters across and will be moving at around 24,000 miles per hour during the pass.
  • ESA initially listed a tiny 2089 impact probability, then removed FA22 from its Risk List in May after follow-up observations ruled out a threat.
  • International teams plan coordinated radar and optical observations, including NASA’s Goldstone facility, with a Virtual Telescope Project livestream overnight Sept. 17–18.
  • Closest approach is expected around 07:41 UTC on Sept. 18, and current projections indicate a nearer flyby in 2173 that remains subject to refinement.