China’s deep-space exploration program reaches a fascinating milestone this week as the Tianwen-2 spacecraft aligns with a mysterious rock sharing Earth’s orbit. Following a successful orbital insertion on June 7, the probe is now flying roughly 2,000 kilometers away from the quasi-moon Kamo’oalewa. The engineering team is preparing for a first-of-its-kind landing attempt scheduled for July 4.
The primary goal is to scoop up roughly 100 grams of regolith from the asteroid’s surface. Scientists suspect Kamo’oalewa is not just a random space rock, but actually an ancient, blasted-off chunk of Earth’s Moon. Retrieving a pristine sample could answer decades-old questions about the history of lunar impacts and the formation of our solar system.
Unlike previous asteroid missions that relied purely on “touch-and-go” methods, Chinese engineers designed Tianwen-2 with an unprecedented anchor-and-attach capability utilizing drills to secure the spacecraft. If the surface proves solid enough, these drills will lock the probe in place while it extracts the material safely.
The spacecraft launched on May 28, 2025, aboard a Long March 3B rocket from the Xichang Satellite Launch Center. It marks China’s second planetary exploration mission following the successful Tianwen-1 Mars orbiter and rover in 2021. After wrapping up its operations at Kamo’oalewa in April 2027, the spacecraft will eject a reentry capsule to drop the collected samples safely on Earth in November 2027. From there, it will use Earth’s gravity to sling itself toward a 2035 rendezvous with the main-belt comet 311P/PANSTARRS.
How the Anchor-and-Attach Method Alters Deep Space Sampling
If Tianwen-2 successfully retrieves and returns these samples, China will join an exclusive club of only three nations—alongside the United States and Japan—to achieve asteroid sample return. The operation builds extensively upon the complex sample-return architecture proven during China’s Chang’e 5 and Chang’e 6 lunar missions.
Moving away from the momentary contact of NASA’s OSIRIS-REx and JAXA’s Hayabusa missions, the new drilling approach tests hardware that could eventually support long-term asteroid mining operations and planetary defense initiatives. Physically clamping to an object in microgravity proves far more difficult than briefly bouncing off it, making this upcoming July 4 maneuver a true test of automated orbital robotics.