Earlier this year, a Chinese satellite fragmented into multiple pieces after colliding with space debris, according to a leading astrophysicist. As satellite numbers in orbit surge, such incidents are poised to become more frequent.
On March 18, 2021, the Chinese military satellite Yunhai 1-02 shattered into 21 pieces, or more. The cause remained unclear until Jonathan McDowell, astrophysicist at the Harvard-Smithsonian Center for Astrophysics, shared his analysis on Twitter on August 15, 2021. His investigation points to a collision with space debris.
McDowell identified a specific entry in the Space-Track.org database for Object 48078, debris from a 1996 Zenit-2 rocket that launched a Russian satellite. The database noted "Collided with satellite", a rare annotation McDowell had never seen before.
Further analysis revealed perfect alignment between Object 48078's path and Yunhai 1-02's fragmentation. The two objects passed within a kilometer of each other at 3:41 a.m. on March 18, 2021—a distance within the database's uncertainty margin.
In an August 17, 2021, Space.com article, McDowell warned that while such collisions are currently rare, risks will escalate proportionally with accumulating space debris. With mega-constellations like Starlink deploying thousands of satellites, urgent mitigation is essential. Notably, space debris recently struck an arm of the International Space Station (ISS).
The European Space Agency (ESA) estimates 34,000 debris objects larger than 10 cm, nearly 900,000 between 1-10 cm, and 128 million from 1 mm to 1 cm. This escalating hazard demands innovative cleanup technologies to safeguard humanity's future in space.
