China’s first-ever asteroid sampling mission has despatched residence an image of its first goal, the “quasi-moon” Kamo’oalewa.
The Tianwen-2 probe launched in 2025 and traveled 620 million miles (1 billion kilometers) to achieve a secure distance about 12 miles (20 km) away from Kamo’oalewa, extra formally often called asteroid 2016HO3. The spacecraft will spend almost a yr learning the asteroid with a collection of 11 completely different scientific devices earlier than trying to gather a pattern from its floor, which can be despatched again to Earth.
The brand new picture was taken on July 2, based on China’s Xinhua news outlet, and divulges the asteroid to be a small, asymmetrical rock measuring round 50–65 toes (16–20 meters) in diameter. Whereas its origin is not recognized, some scientists imagine this quasi-moon may have been created when an enormous influence knocked a piece of our personal moon into house between 1 million and 10 million years in the past.
So-called quasi-moons (or quasi-satellites) are small our bodies like Kamo’oalewa that circle the solar on orbits that preserve them near our planet. Earth has not less than seven recognized quasi-satellites, and our planet’s gravity will sometimes seize others quickly earlier than they’re flung again out into orbit across the solar. Typically, the orbits of those quasi-moons are much less secure than the orbits of true moons.
In contrast to most near-Earth asteroids which are thought to originate from the principle asteroid belt between Mars and Jupiter, Kamo’oalewa may have come from a lot nearer to residence. A 2024 examine printed in Nature Astronomy proposes Kamo’oalewa might be materials ejected from the moon by the influence that shaped Giordano Bruno crater.
Pattern of the asteroid collected by Tianwen-2 may assist show that speculation, if the mission is profitable.
Tianwen-2 launched on Could 28, 2025 atop a Lengthy March 3B rocket from Xichang spaceport in southwestern China. The looks of the spacecraft wasn’t revealed till China’s house company launched an picture beamed residence by Tianwen-2 when it was 1.8 million miles (3 million km) away from Earth. This occurred simply over every week previous launch.
Whereas Tianwen-2 marks China’s first asteroid pattern try, Japan and the US have already carried out profitable space-rock-sample missions of their very own. Japan’s Hayabusa spacecraft executed the world’s first asteroid pattern return mission when it despatched materials from asteroid 25143 Itokawa again to Earth in 2010.
The US completed the feat in 2023 with the OSIRIS-REx mission that snagged materials from asteroid Bennu. These samples have already produced stunning scientific information, together with the very fact they include the amino acids we contemplate important for all times right here on Earth.
Tianwen-2 is China’s first-ever mission to an asteroid and its second planetary exploration mission general. Its first interplanetary endeavor, Tianwen-1, noticed an orbiter and a rover attain Mars in 2020.
Extra Tianwen missions are within the works. China plans to launch the Tianwen-3 Mars sample-return mission in 2028 and Tianwen 4 two years later to review Jupiter and Uranus.
