Tianwen-2 has sent back its first image of Kamo‘oalewa, the small asteroid it reached after about 400 days in flight. The picture is the mission’s first visible sign that the spacecraft has arrived at its target and is now moving into the next phase of a rare sample-return effort.
The timing matters because the spacecraft has already covered about 621 million miles to reach a rock that is only about 66 feet across and spins once every 28 minutes. Kamo‘oalewa was discovered in 2016 and has drawn attention because it loops by Earth as a quasi-satellite, staying close to Earth while orbiting the sun. Astronomers have identified eight such objects, sometimes called Earth’s mini moons or quasi moons, but Kamo‘oalewa remains the one now under direct study.
China National Space Administration said Tianwen-2 reached a distance of 12 miles from the asteroid in late June, then began the kind of close work that makes a mission like this possible. The spacecraft is set to progressively conduct more detailed scientific exploration to acquire data on the asteroid’s morphology, material composition and internal structure, laying the groundwork for later sample collection. In practice, that means moving from first look to careful mapping, then to the recovery phase, with the spacecraft using its measurements to decide how and where to try to grab material.
That task is complicated by the odd story Kamo‘oalewa may tell. Some research suggests the object is a stray piece of Earth’s moon thrown into space by an ancient impact, but observations from the James Webb Space Telescope point away from that idea. The disagreement is part of what makes the target so valuable: every new reading could narrow down whether this is a moon fragment, a long-lived near-Earth companion, or something else entirely.
Tianwen-2 launched on May 28, 2025, to retrieve samples from Kamo‘oalewa, and it is scheduled to bring them back to Earth in 2027. The samples are expected to be dropped into Earth’s atmosphere during a flyby, after which the spacecraft will continue on to comet 311P/PanSTARRS for further observations and scientific studies. For now, the first image is less a finish line than proof that the mission is entering its hardest and most consequential stretch.
