Revision History

Asteroid 2026 JH2, a rock between 16 and 35 meters wide, passed Earth on May 18, 2026 at just 91,000 kilometers — less than a quarter of the distance to the Moon — after being discovered only eight days earlier. The flyby posed no impact threat, but the narrow detection window highlights persistent gaps in planetary defense surveillance, particularly for small asteroids approaching from the direction of the Sun.