New Study Questions Lunar Origin of Kamo'oalewa Asteroid Ahead of Tianwen-2 Mission
Kamo'oalewa asteroid's lunar origin challenged ahead of Tianwen-2 arrival

Image: Phys.org
A recent study challenges the assumption that the Kamo'oalewa asteroid originated from the moon, ahead of China's Tianwen-2 mission set to collect samples. Researchers found evidence suggesting it may instead come from the Flora family of asteroids, based on spectral analysis and simulations of space weathering.
- 01The Kamo'oalewa asteroid is a quasi-satellite near Earth, measuring under 300 feet across.
- 02Previous theories suggested Kamo'oalewa originated from the moon due to its red spectrum resembling lunar soil.
- 03New analysis indicates a spectral match with LL chondrite meteorites rather than lunar rock.
- 04The research team proposes that Kamo'oalewa likely originated from the Flora family of asteroids.
- 05The findings do not completely dismiss the possibility of a lunar origin.
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China's Tianwen-2 mission is en route to the Kamo'oalewa asteroid, previously thought to be of lunar origin. However, a recent study in *Nature Communications* challenges this assumption. Researchers from the Chinese Academy of Sciences, led by Yang Li, analyzed the asteroid's reflected light and discovered a spectral feature more typical of LL chondrite meteorites. To further investigate, they simulated space weathering effects on LL chondrite powder, finding that it could match Kamo'oalewa's red appearance. This suggests that the asteroid's surface material could develop a red hue similar to lunar soil without actually being lunar in origin. The team posits that Kamo'oalewa may have originated from the Flora family of asteroids, with a surface composition resembling that of Itokawa, another asteroid previously sampled by Japan. While the study points to a non-lunar origin, the researchers remain open to the possibility of a lunar connection.
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