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Tianwen-2 target asteroid (469219) Kamo'oalewa probably develops an Itokawa-compositional but ultra-highly space-weathered surface

Fuente: arXiv

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Dettagli Bibliografici
Autori principali:	Zhang, Pengfei, Zhang, Guozheng, Wei, Zichen, Granvik, Mikael, Yan, Xiaoran, Wang, Pengyue, Zhang, Qinwei, Pang, Ronghua, Zhou, Wen-Han, Jiang, Te, Vernazza, Pierre, Hiroi, Takahiro, Cloutis, Edward, DeMeo, Francesca, Beck, Pierre, Ip, Wing-Huen, Fenucci, Marco, Zhang, Yongxiong, Marsset, Michael, Niu, Yunbo, Lu, Xuejin, Wu, Xing, Lin, Honglei, Hu, Shoucun, Cheng, Bin, Zhao, Haibin, Wang, Xiaobin, Lu, Xiaoping, Zhang, Yonglong, Ling, Zongcheng, Zhang, Jiang, Zhao, Sizhe, Lantz, Cateline, Geem, Jooyeon, He, Zhiping, Wang, Juntao, Zhou, Liyong, Zhang, Xiliang, Li, Shijei, Hu, Sen, Yang, Wei, Li, Xiongyao, Zhang, Xiaoping, Liu, Jiahui, Zhang, Peng, Zhang, Guang, Lin, Yangting, Li, Yang
Natura:	Preprint
Pubblicazione:	2026
Soggetti:	Earth and Planetary Astrophysics
Accesso online:	Acceder al recurso
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_version_	1866911553129807872
author	Zhang, Pengfei Zhang, Guozheng Wei, Zichen Granvik, Mikael Yan, Xiaoran Wang, Pengyue Zhang, Qinwei Pang, Ronghua Zhou, Wen-Han Jiang, Te Vernazza, Pierre Hiroi, Takahiro Cloutis, Edward DeMeo, Francesca Beck, Pierre Ip, Wing-Huen Fenucci, Marco Zhang, Yongxiong Marsset, Michael Niu, Yunbo Lu, Xuejin Wu, Xing Lin, Honglei Hu, Shoucun Cheng, Bin Zhao, Haibin Wang, Xiaobin Lu, Xiaoping Zhang, Yonglong Ling, Zongcheng Zhang, Jiang Zhao, Sizhe Lantz, Cateline Geem, Jooyeon He, Zhiping Wang, Juntao Zhou, Liyong Zhang, Xiliang Li, Shijei Hu, Sen Yang, Wei Li, Xiongyao Zhang, Xiaoping Liu, Jiahui Zhang, Peng Zhang, Guang Lin, Yangting Li, Yang
author_facet	Zhang, Pengfei Zhang, Guozheng Wei, Zichen Granvik, Mikael Yan, Xiaoran Wang, Pengyue Zhang, Qinwei Pang, Ronghua Zhou, Wen-Han Jiang, Te Vernazza, Pierre Hiroi, Takahiro Cloutis, Edward DeMeo, Francesca Beck, Pierre Ip, Wing-Huen Fenucci, Marco Zhang, Yongxiong Marsset, Michael Niu, Yunbo Lu, Xuejin Wu, Xing Lin, Honglei Hu, Shoucun Cheng, Bin Zhao, Haibin Wang, Xiaobin Lu, Xiaoping Zhang, Yonglong Ling, Zongcheng Zhang, Jiang Zhao, Sizhe Lantz, Cateline Geem, Jooyeon He, Zhiping Wang, Juntao Zhou, Liyong Zhang, Xiliang Li, Shijei Hu, Sen Yang, Wei Li, Xiongyao Zhang, Xiaoping Liu, Jiahui Zhang, Peng Zhang, Guang Lin, Yangting Li, Yang
contents	China's Tianwen-2 mission plans to return samples from a small, rapidly spinning Earth quasi-satellite (469219) Kamo'oalewa. Previous studies linked Kamo'oalewa to lunar composition and origin. Here, we propose another scenario. We reanalyzed the reflectance spectrum of Kamo'oalewa and obtained an absorption band center at 1.001+-0.028 um (error is 1sigma), consistent with LL chondrites. We then conducted space weathering (SW) experiments on meteorites and found that highly space-weathered LL chondrite powder (but not slab) successfully reproduced the reflectance spectrum of Kamo'oalewa. We further traced the dynamical origin of Kamo'oalewa and found that it probably originated from the v6 secular resonance, and more specifically, the Flora family. Kamo'oalewa exhibits a similar composition to Itokawa and 7 objects in the Flora family, but with a higher degree of space weathering. We, therefore, proposed that Kamo'oalewa probably originated from the Flora family and developed an Itokawa-compositional, highly space-weathered, fine-regolith-dominated surface.
format	Preprint
id	arxiv_https___arxiv_org_abs_2603_28102
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Tianwen-2 target asteroid (469219) Kamo'oalewa probably develops an Itokawa-compositional but ultra-highly space-weathered surface Zhang, Pengfei Zhang, Guozheng Wei, Zichen Granvik, Mikael Yan, Xiaoran Wang, Pengyue Zhang, Qinwei Pang, Ronghua Zhou, Wen-Han Jiang, Te Vernazza, Pierre Hiroi, Takahiro Cloutis, Edward DeMeo, Francesca Beck, Pierre Ip, Wing-Huen Fenucci, Marco Zhang, Yongxiong Marsset, Michael Niu, Yunbo Lu, Xuejin Wu, Xing Lin, Honglei Hu, Shoucun Cheng, Bin Zhao, Haibin Wang, Xiaobin Lu, Xiaoping Zhang, Yonglong Ling, Zongcheng Zhang, Jiang Zhao, Sizhe Lantz, Cateline Geem, Jooyeon He, Zhiping Wang, Juntao Zhou, Liyong Zhang, Xiliang Li, Shijei Hu, Sen Yang, Wei Li, Xiongyao Zhang, Xiaoping Liu, Jiahui Zhang, Peng Zhang, Guang Lin, Yangting Li, Yang Earth and Planetary Astrophysics China's Tianwen-2 mission plans to return samples from a small, rapidly spinning Earth quasi-satellite (469219) Kamo'oalewa. Previous studies linked Kamo'oalewa to lunar composition and origin. Here, we propose another scenario. We reanalyzed the reflectance spectrum of Kamo'oalewa and obtained an absorption band center at 1.001+-0.028 um (error is 1sigma), consistent with LL chondrites. We then conducted space weathering (SW) experiments on meteorites and found that highly space-weathered LL chondrite powder (but not slab) successfully reproduced the reflectance spectrum of Kamo'oalewa. We further traced the dynamical origin of Kamo'oalewa and found that it probably originated from the v6 secular resonance, and more specifically, the Flora family. Kamo'oalewa exhibits a similar composition to Itokawa and 7 objects in the Flora family, but with a higher degree of space weathering. We, therefore, proposed that Kamo'oalewa probably originated from the Flora family and developed an Itokawa-compositional, highly space-weathered, fine-regolith-dominated surface.
title	Tianwen-2 target asteroid (469219) Kamo'oalewa probably develops an Itokawa-compositional but ultra-highly space-weathered surface
topic	Earth and Planetary Astrophysics
url	https://arxiv.org/abs/2603.28102