KMS of Xinjiang Astronomical Observatory, CAS
| Surface Thermal Inertia of Near-Earth Asteroid (469219) Kamo`oalewa: Statistical Estimation and Implications | |
| Liu, Lu1; Chen, Qiao1; Yan, Jianguo2,3; Yu, Liangliang4; Fenucci, Marco5; Ye, Mao2; Zhong, Zhen6; Qiu, Denggao2; Barriot, Jean-Pierre2,7 | |
| 2024-08-01 | |
| Source Publication | SOLAR SYSTEM RESEARCH
 |
| ISSN | 0038-0946 |
| Volume | 58Issue:4Pages:469-479 |
| Contribution Rank | 3 |
| Abstract | The Chinese small body exploration mission Tianwen-2 is aimed at sampling the near-Earth, fast-rotating asteroid (469219) Kamo`oalewa and returning the samples to Earth. Characterisation of the currently unknown physical properties of Kamo`oalewa in the pre-mission phase would support mission implementation. In this study, we preliminarily estimate the surface thermal inertia of Kamo`oalewa using a statistical method, based on the Yarkovsky-related orbital drift of (-6.155 +/- 1.758) x 10(-3) au/Myr for Kamo`oalewa obtained in our previous work. A reasonable estimate of the surface thermal inertia obtained is 402.05(- 194.37)(+ 376.29)J K-1 m(-2) s(-1/2). This low value suggests the presence of coarse regolith on the surface of Kamo`oalewa or its nature as a porous rock. The regolith potentially present on the surface of Kamo`oalewa may have millimetre- to decimetre-sized grains with cohesive strengths varying from similar to 0.76 to similar to 0.045 Pa. If Kamo'oalewa is a porous rock, its porosity is expected to range from similar to 20 to 50%, corresponding to tensile strengths of similar to 1.3 to 11.5 MPa. This study provides preliminary insights into the surface thermal inertia of Kamo`oalewa from a statistical viewpoint, which may facilitate the Tianwen-2 mission. |
| Keyword | Thermal inertia Kamo`oalewa Yarkovsky effect Chinese Small Body Exploration Mission |
| DOI | 10.1134/S0038094624700321 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | THERMOPHYSICAL PROPERTIES ; GRAIN-SIZE ; YARKOVSKY ; MAGNITUDE ; STRENGTH ; DENSITY ; ORBIT |
| Funding Project | National Natural Science Foundation of China[42241116] ; National Natural Science Foundation of China[42030110] ; National Key Research and Development Program of China[2022YFF0503202] ; The 2022 Project of Xinjiang Uygur Autonomous Region of China for Heaven Lake Talent Program ; Macau University of Science and Technology[SKL-LPS(MUST)-2021-2023] ; Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University[21-01-01] ; French Space Agency (CNES) |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001270369800007 |
| Publisher | PLEIADES PUBLISHING INC |
| Funding Organization | National Natural Science Foundation of China ; National Key Research and Development Program of China ; The 2022 Project of Xinjiang Uygur Autonomous Region of China for Heaven Lake Talent Program ; Macau University of Science and Technology ; Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University ; French Space Agency (CNES) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6859 |
| Collection | 中国科学院新疆天文台 |
| Corresponding Author | Yan, Jianguo |
| Affiliation | 1.Chongqing Satellite Network Syst Co Ltd, Chongqing 401135, Peoples R China 2.Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & Re, Wuhan 430070, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Macau, Peoples R China 5.ESA NEO Coordinat Ctr, Largo Galileo Galilei 1, I-00044 Frascati, RM, Italy 6.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550025, Peoples R China 7.Univ French Polynesia, Geodesy Observ Tahiti, BP 6570, F-98702 Faaa Tahiti, France |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Liu, Lu,Chen, Qiao,Yan, Jianguo,et al. Surface Thermal Inertia of Near-Earth Asteroid (469219) Kamo`oalewa: Statistical Estimation and Implications[J]. SOLAR SYSTEM RESEARCH,2024,58(4):469-479. |
| APA | Liu, Lu.,Chen, Qiao.,Yan, Jianguo.,Yu, Liangliang.,Fenucci, Marco.,...&Barriot, Jean-Pierre.(2024).Surface Thermal Inertia of Near-Earth Asteroid (469219) Kamo`oalewa: Statistical Estimation and Implications.SOLAR SYSTEM RESEARCH,58(4),469-479. |
| MLA | Liu, Lu,et al."Surface Thermal Inertia of Near-Earth Asteroid (469219) Kamo`oalewa: Statistical Estimation and Implications".SOLAR SYSTEM RESEARCH 58.4(2024):469-479. |
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| Liu-2024-Surface The（880KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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