Particle.news

Download on the App Store

Tiny Target for Hayabusa2: 1998 KY26 Measures 11 Meters and Spins in Five Minutes

The rapid five-minute rotation makes a 2031 visit harder for Hayabusa2.

Overview

  • A peer-reviewed Nature Communications study using multiple telescopes, including ESO’s Very Large Telescope, revised the asteroid’s size and spin.
  • The object is roughly comparable in size to the spacecraft, complicating any planned touch-and-go or landing attempt.
  • Observations suggest a bright surface and a likely solid boulder composition, though a loose rubble pile cannot be ruled out.
  • Earlier estimates of about 30 meters and a roughly 10-minute rotation have been replaced by the new ~11-meter diameter and ~5-minute period.
  • Researchers say the methods show that even very small near-Earth objects can be characterized from Earth, informing mission design and hazard assessment.