| Numerical model of Phobos’ motion incorporating the effects of free rotation | |
杨永章1,2,7 ; Yan, Jianguo2; Jian, Nianchuan3; Matsumoto, Koji4,6; Barriot, Jean-Pierre2,5
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| 发表期刊 | Astronomy and Astrophysics
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| 2024-04-30 | |
| 卷号 | 685 |
| DOI | 10.1051/0004-6361/202039412 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI ; EI |
| 关键词 | methods: numerical astrometry celestial mechanics ephemerides minor planets, asteroids: individual: Phobos planets and satellites: physical evolution |
| 摘要 | Context. High-precision ephemerides are not only useful in supporting space missions, but also in investigating the physical nature of celestial bodies. This paper reports an update to the orbit and rotation model of the Martian moon Phobos. In contrast to earlier numerical models, this paper details a dynamical model that fully considers the rotation of Phobos. Here, Phobos’ rotation is first described by Euler’s rotational equations and integrated simultaneously with the orbital motion equations. We discuss this dynamical model, along with the differences with respect to the model now in use. Aims. This work is aimed at updating the physical model embedded in the ephemerides of Martian moons, considering improvements offered by exploiting high-precision observations expected from future missions (e.g., Japanese Martian Moons eXploration, MMX), which fully supports future studies of the Martian moons. Methods. The rotational motion of Phobos can be expressed by Euler’s rotational equations and integrated in parallel with the equations of the orbital motion of Phobos around Mars. In order to investigate the differences between the two models, we first reproduced and simulated the dynamical model that is now used in the ephemerides, but based on our own parameters. We then fit the model to the newest Phobos ephemeris published by Institut de Mécanique Céleste et de Calcul des Éphémérides (IMCCE). Based on our derived variational equations, the influence of the gravity field, the Love number, k2, and the rotation behavior were studied by fitting the full model to the simulated simple model. Our revised dynamic model for Phobos was constructed as a general method that can be extended with appropriate corrections (mainly rotation) to systems other than Phobos, such as the Saturn and Jupiter systems. Results. We present the variational equation for Phobos’ rotation employing the symbolic Maple computation software. The adjustment test simulations confirm the latitude libration of Phobos, suggesting gravity field coefficients obtained using a shape model and homogeneous density hypothesis should be re-examined in the future in the context of dynamics. Furthermore, the simulations with different k2 values indicate that it is difficult to determine k2 efficiently using the current data. © The Authors 2024. |
| 资助项目 | National Key Research and Development Program of China[2021YFA0715101]; National Key Research and Development Program of China[2022YFF0503202]; National Natural Science Foundation of China[12033009]; National Natural Science Foundation of China[12103087]; National Natural Science Foundation of China[42241116]; International Partnership Program of Chinese Academy of Sciences[020GJHZ2022034FN]; Yunnan Province Foundation[202201AU070225]; Yunnan Province Foundation[202301AT070328]; Young Talent Project of Yunnan Revitalization Talent Support Program; Key Laboratory of Lunar and Deep Space Exploration, Chinese Academy of Sciences[LDSE202004]; open research fund of state key laboratory of information engineering in surveying, mapping and remote sensing, Wuhan University[21P02] |
| 项目资助者 | National Key Research and Development Program of China[2021YFA0715101, 2022YFF0503202] ; National Natural Science Foundation of China[12033009, 12103087, 42241116] ; International Partnership Program of Chinese Academy of Sciences[020GJHZ2022034FN] ; Yunnan Province Foundation[202201AU070225, 202301AT070328] ; Young Talent Project of Yunnan Revitalization Talent Support Program ; Key Laboratory of Lunar and Deep Space Exploration, Chinese Academy of Sciences[LDSE202004] ; open research fund of state key laboratory of information engineering in surveying, mapping and remote sensing, Wuhan University[21P02] |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 天体测量学 |
| 文章类型 | Article |
| 出版者 | EDP SCIENCES S A |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| ISSN | 0004-6361 |
| URL | 查看原文 |
| WOS记录号 | WOS:001231008100025 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | MARTIAN SATELLITES ; ACCURATE EPHEMERIDES ; GALILEAN SATELLITES ; ORBITAL MOTION ; GRAVITY-FIELD ; WORKING GROUP ; ESAPHO ; MASSES ; INTEGRATION ; SPACECRAFT |
| EI入藏号 | 20241916057136 |
| EI主题词 | Planets |
| EI分类号 | 655.2 Satellites - 657.2 Extraterrestrial Physics and Stellar Phenomena - 921 Mathematics - 921.2 Calculus - 921.6 Numerical Methods - 931.1 Mechanics |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/27204 |
| 专题 | 应用天文研究组 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China; 2.State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, 430070, China; 3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, 200030, China; 4.National Astronomical Observatory of Japan, 2-12 Hoshigaoka, Mizusawa, Iwate, Oshu, 023-0861, Japan; 5.Observatoire géodésique de Tahiti, BP 6570, Faa’a, French Polynesia, Tahiti, 98702, France; 6.The Graduate University for Advanced Studies, SOKENDAI, Shonan Village, Kanagawa, Hayama, 240-0193, Japan; 7.Key Laboratory of Lunar and Deep Space Exploration, Chinese Academy of Sciences, Beijing, 100012, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | 杨永章,Yan, Jianguo,Jian, Nianchuan,等. Numerical model of Phobos’ motion incorporating the effects of free rotation[J]. Astronomy and Astrophysics,2024,685. |
| APA | 杨永章,Yan, Jianguo,Jian, Nianchuan,Matsumoto, Koji,&Barriot, Jean-Pierre.(2024).Numerical model of Phobos’ motion incorporating the effects of free rotation.Astronomy and Astrophysics,685. |
| MLA | 杨永章,et al."Numerical model of Phobos’ motion incorporating the effects of free rotation".Astronomy and Astrophysics 685(2024). |
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| Numerical model of P（1182KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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