A Chinese spacecraft is now within 12.5 miles of Kamo’oalewa, a rapidly spinning quasi-moon orbiting Earth. Launched in May 2025, the Tianwen-2 probe reached the asteroid after a 620-million-mile journey, positioning China to attempt unprecedented surface sampling on the smallest celestial object ever visited by humans.
Reaching Earth’s Most Elusive Quasi-Moon
Launched in May of 2025, the nearly two-ton probe spent 400 days traversing approximately 620 million miles to arrive at the asteroid, marking the first time a world power has approached this specific celestial body.
Discovered by a Hawaiian survey telescope in April of 2016, Kamo’oalewa is classified as one of Earth’s seven known quasi-moons. Measuring just a few dozen feet in diameter, the asteroid represents a uniquely demanding target for deep-space navigation and data collection.
An Unprecedented Target for Sampling Techniques
Over the next year, the Tianwen-2 spacecraft will fly side-by-side with Kamo’oalewa to analyze its composition and structure before attempting to retrieve surface material. If successful, China will become the third nation to collect a sample from an asteroid. More uniquely, the mission could pioneer the anchor-and-attach
method for sample retrieval.
This technique involves the spacecraft securing itself directly to the surface of the quasi-moon before deploying an ultrasonic drill to bore into the rock. Planetary scientist Cristina Thomas of Northern Arizona University noted the extreme scale of the endeavor to the New York Times, stating that Cristina Thomas, planetary scientist at Northern Arizona University, noted that Kamo’oalewa is the smallest object that humans have visited with a spacecraft.
Cristina Thomas, planetary scientist at Northern Arizona University, stated that Kamo’oalewa is the smallest object that humans have visited with a spacecraft.
Navigating a Rapidly Spinning Celestial Target
The physical characteristics of Kamo’oalewa create severe engineering hurdles for the mission’s operators. Because the asteroid’s exact mass remains unknown, the massive Tianwen-2 probe must exercise extreme caution during its close approach to avoid inadvertently deflecting the space rock off its trajectory. Furthermore, the asteroid rotates rapidly, completing one full revolution roughly every half hour of Earth time.
This swift rotation compresses the operational window for any contact maneuvers, demanding exceptionally precise timing. According to state-run outlet Xinhua, the extensive travel time and intricate proximity operations highlight the expanding technological capabilities of the People’s Republic in Earth’s orbit and deep space.
The Broader Ambitions of China’s Space Age
The Tianwen-2 rendezvous underscores a broader push by China to establish itself as a dominant force in planetary exploration. Alongside banner undertakings such as the nation’s orbital space station and successful reusable rocket booster developments, missions targeting distant asteroids demonstrate growing dexterity in deep-space operations.
Executing the planned touch-and-go and anchor-and-attach sampling methods will require months of calculated, incremental maneuvers. As the probe spends the better part of a year gathering structural and compositional data alongside the spinning rock, it marks another step in a rapidly accelerating national space program.
