The space probe is supposed to scoop up samples from the newly imaged space rock and return them to Earth next year. However, the blurry photo and the timing of its release hint that this may be trickier than initially thought.
The CNSA has released minimal information about the parameters and timeline of the Tianwen-2 mission and only shared the first photo of the spacecraft several weeks after its launch. Based on one unverified timeline, Live Science previously reported that the probe had most likely arrived at Kamo'oalewa on June 7. However, Chinese officials have remained tight-lipped about the probe's progress.
This photo of one of Tianwen-2's decagonal solar panels, captured in orbit, was the first image of the probe released by the CNSA. (Image credit: CNSA)
The announcement was accompanied by the first clear photograph of Kamo'oalewa, captured at a distance of around 12.5 miles (20 km) from the quasi-moon. The blurry image suggests the space rock is around 130 feet (40 meters) across, according to the South China Morning Post, which is on the lower end of previous estimates that suggested the asteroid was up to 330 feet (100 m) wide.
The asteroid's small size, fragile composition and fast spin will make it harder for the probe to collect samples from the space rock's surface, even with other tried-and-true techniques. The new image also hints that there are few flat spots on the space rock where the probe could land safely.
Tianwen-2 launched into space May 28, 2025 on board one of China's Long March 3B rockets. (Image credit: VCG/VCG via Getty Images)
The unverified mission timeline, which correctly predicted the probe's arrival date, stated that the sampling attempt would commence July 4. However, the fact that this has seemingly not happened yet further suggests that Chinese scientists are struggling to figure out how to collect their desired samples.
If Tianwen-2 does manage to snag some samples, the probe will release them in a capsule during a flyby of Earth in November 2027, and they will reenter the atmosphere at around 27,000 mph (43,500 km/h). This would make China the third country to successfully collect and return asteroid samples to Earth, following Japan, which returned samples from the asteroid Ryugu in 2020, and the U.S., which acquired material from the space rock Bennu in 2023.
Kamo'oalewa (a.k.a. 2016 HO3) circles Earth but does not orbit our planet. This simulation shows its predicted movements relative to Earth over the next few centuries. (Image credit: NASA/Pheonix7777/Wikimedia)RELATED STORIES
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"I am curious to find out the answer about its origin, since the debate on its [potential] lunar origin is still very open," Marco Fenucci, a mathematician at the European Space Agency's Near-Earth Object Coordination Centre who has co-authored multiple studies on Kamo'oalewa, previously told Live Science. Any returned samples should "definitely give us an answer to this matter," he added.
After its close approach to Earth next year, Tianwen-2 will slingshot farther into the solar system to begin its secondary mission to study 311P/PanSTARRS — a peculiar object beyond Mars that displays characteristics of both comets and asteroids — in 2035.
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