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last mo.

NASA Monitors Five Aircraft-Sized Asteroids After Exceptionally Close 2025 OS Flyby

The agency’s observatory networks will track objects measuring 110 to 210 feet across from July 26 through early August, refining trajectory models to update planetary defense protocols

A stock image shows an asteroid making a close approach to our planet.
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Overview

  • Asteroid 2025 OS swept within 2,534 miles of Earth on July 18 at about 28,409 mph and measured roughly 2.7 to 6 meters in diameter with no impact risk.
  • ATLAS astronomers in Chile detected 2025 OS on July 19 using a 20-inch telescope, illustrating advances in spotting small near-Earth objects.
  • Asteroid 2025 OX, estimated at 110 feet wide, will fly past at about 2.81 million miles on July 26.
  • On July 28, asteroid 2025 OW will pass Earth at roughly 393,000 miles—about 1.6 times the distance to the Moon—while traveling near 46,908 mph.
  • NASA’s Center for Near-Earth Object Studies is also tracking asteroids 2018 BE5 on July 28, 2025 OR on July 31 and 2019 CO1 in early August to refine orbital predictions.