High-precision Astrometric Positioning of Near-Earth Asteroids-via the Close Approach Method
文献类型：期刊论文
| 作者 | Zhang, ZhenJun1,2; Wang JC(王建成)3,4,5; Zhang, YiGong6; Su, Jie7; Cheng XM(程向明)3,4,5,8 |
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2026-06-01 |
| 卷号 | 171期号:6 |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/ae5b7a |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | High-precision astrometry of near-Earth asteroids (NEAs) is critical for orbit determination and impact risk assessment, yet it remains challenging due to their rapid apparent motion and short-range systematic errors. In this work, we apply the close approach astrometric technique to eight events involving NEAs Camillo and 2017 VR12, observed using the 1 m telescope at Yunnan Observatory. By modeling the squared relative angular distance between the NEA and Gaia-catalog reference stars, we derive the epoch of minimum separation and the impact parameter. Our results show that the close approach method significantly mitigates common-mode atmospheric turbulence and instrumental distortions. For Camillo, we achieve a post-fit residual precision of approximately 4-7 mas, indicating a substantially smaller internal scatter than conventional astrometry obtained under similar observing conditions. These results demonstrate that the close approach technique can provide milliarcsecond-level relative astrometry for NEAs under favorable observing conditions, while also highlighting the limitations imposed by extreme apparent motion and image trailing in very fast-moving targets. |
| 学科主题 | 天文学 ; 天体测量学 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | MUTUAL APPROXIMATIONS ; ASTROPY ; PROJECT ; PREMIUM ; PACKAGE |
| 资助项目 | Anyang Institute of Technology (AYIT)[BSJ-2020025]; Training Object Project of technological innovation talents in Yunnan Province[202305AD160004]; China Manned Space Project[CMS-CSST-2021-A12]; National Natural Science Foundation of China (NSFC)[12173085]; Natural Science Foundation of Henan[252300420884] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001761130800001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Anyang Institute of Technology (AYIT)[BSJ-2020025] ; Training Object Project of technological innovation talents in Yunnan Province[202305AD160004] ; China Manned Space Project[CMS-CSST-2021-A12] ; National Natural Science Foundation of China (NSFC)[12173085] ; Natural Science Foundation of Henan[252300420884] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29175]  |
| 专题 | 云南天文台_射电天文研究组 |
| 通讯作者 | Zhang, ZhenJun |
| 作者单位 | 1.School of Computer of Science and Information Engineering, Anyang Institute of Technology, Anyang 455000, People’s Republic of China; zjzhang@ayit.edu.cn; 2.Henan Provincial Key Laboratory of Intelligent Rehabilitation Equipment, Anyang 455000, People’s Republic of China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China; cxm@ynao.ac.cn; 4.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China; 5.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China; 6.School of Information Engineering, Kunming University, Kunming 650214, People’s Republic of China; 7.Yunnan Agricultural University, College of Big Data, Kunming 650201, People’s Republic of China; 8.State Key Laboratory of Radio Astronomy and Technology, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Zhang, ZhenJun,Wang JC,Zhang, YiGong,et al. High-precision Astrometric Positioning of Near-Earth Asteroids-via the Close Approach Method[J]. ASTRONOMICAL JOURNAL,2026,171(6). |
| APA | Zhang, ZhenJun,王建成,Zhang, YiGong,Su, Jie,&程向明.(2026).High-precision Astrometric Positioning of Near-Earth Asteroids-via the Close Approach Method.ASTRONOMICAL JOURNAL,171(6). |
| MLA | Zhang, ZhenJun,et al."High-precision Astrometric Positioning of Near-Earth Asteroids-via the Close Approach Method".ASTRONOMICAL JOURNAL 171.6(2026). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。