Tianwen-2 Reaches Kamoʻoalewa at 20 Km, Reveals Asteroid Just Over 20 Meters Wide
Updated
Updated · SpaceNews · Jul 6
Tianwen-2 Reaches Kamoʻoalewa at 20 Km, Reveals Asteroid Just Over 20 Meters Wide
3 articles · Updated · SpaceNews · Jul 6
Summary
China said Tianwen-2 has closed to 20 km from Kamoʻoalewa after a 1 billion-km, 400-day flight, releasing the first close-up image of the near-Earth asteroid.
The image shows a small, elongated rocky body just over 20 meters across, far below earlier 40-100 meter ground-based estimates and broadly matching a recent JWST-based estimate of about 18 meters.
CNSA said the 20 km station point opens close-proximity operations including global mapping, surveying and sample-site selection ahead of a planned sample pickup and Earth return in late 2027.
Early image analysis also supports a high-reflectivity, likely asteroidal origin for Kamoʻoalewa, weakening the idea that it is a fragment blasted off the Moon.
This asteroid might be a lost piece of our Moon. What secrets could China's Tianwen-2 probe now uncover?
How will Tianwen-2's novel sampling techniques on a fast-spinning rock revolutionize future deep-space missions?
Tianwen-2 at Kamoʻoalewa: China’s Historic Sample Return Mission to a Near-Earth Quasi-Satellite
Overview
China's Tianwen-2 probe has successfully arrived at the near-Earth asteroid 469219 Kamoʻoalewa, marking a major milestone in asteroid exploration. After a journey of about 400 days, the China National Space Administration confirmed the arrival on July 6, 2026. While CNSA had kept the mission's progress quiet, tracking by AMSAT-DL in Europe revealed Tianwen-2's approach and a series of engine burns as it neared the asteroid. This achievement opens a new chapter in exploring small celestial bodies and demonstrates China's growing capabilities in deep space missions.