International Asteroid Warning Network Timing Campaign: 2019 XS
文献类型：期刊论文
| 作者 | Farnocchia, Davide25; REF!Lane, David26 |
| 刊名 | The Planetary Science Journal
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 3页码:156 |
| 关键词 | Asteroids Near-Earth objects Optical telescopes Astrometry 72 1092 1174 80 |
| ISSN号 | 2632-3338 |
| DOI | 10.3847/PSJ/ac7224 |
| 产权排序 | 23 |
| 英文摘要 | As part of the International Asteroid Warning Network's observational exercises, we conducted a campaign to observe near-Earth asteroid 2019 XS around its close approach to Earth on 2021 November 9. The goal of the campaign was to characterize errors in the observation times reported to the Minor Planet Center, which become an increasingly important consideration as astrometric accuracy improves and more fast-moving asteroids are observed. As part of the exercise, a total of 957 astrometric observations of 2019 XS during the encounter were reported and subsequently were analyzed to obtain the corresponding residuals. While the timing errors are typically smaller than 1 s, the reported times appear to be negatively biased, i.e., they are generally earlier than they should be. We also compared the observer-provided position uncertainty with the cross-track residuals, which are independent of timing errors. A large fraction of the estimated uncertainties appear to be optimistic, especially when <0.″2. We compiled individual reports for each observer to help identify and remove the root cause of any possible timing error and improve the uncertainty quantification process. We suggest possible sources of timing errors and describe a simple procedure to derive reliable, conservative position uncertainties. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5132]  |
| 专题 | 新疆天文台_其它 |
| 作者单位 | 1.Gruppo Astrofili Montelupo, Via San Vito 60, I-50056 Montelupo Fiorentino (FI), Italy; 2.GiaGa Observatory, Via Mozart 4, I-20005 Pogliano Milanese (MI), Italy; 3.Xinjiang Astronomical Observatory, 150 Science One St, Ürümqi, Xinjiang Uyghur Autonomous Region 830011, People’s Republic of China; 4.6ROADS Ltd., Godebskiego 55a Street, 31-999 Cracow, Poland; 5.Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland; 6.Asteroid Engineering Lab, Luleå University of Technology, Box 848, SE-98128 Kiruna, Sweden; 7.Public Observatory Buchloe, Alois-Reiner-Str. 15b, D-86807 Buchloe, Germany; 8.National Astronomical Agency, Zheleznodorozhnaya street 1, Afipsky village, Krasnodar Territory, Russia; 9.Wickede Observatory, Stemmering 5, D-44319 Dortmund, Germany; 10.ESA ESOC Space Safety Service Centre, Robert-Bosch-Straße 5, D-64293, Darmstadt, Germany; |
| 推荐引用方式 GB/T 7714 | Farnocchia, Davide,REF!Lane, David. International Asteroid Warning Network Timing Campaign: 2019 XS[J]. The Planetary Science Journal,2022,3:156. |
| APA | Farnocchia, Davide,&REF!Lane, David.(2022).International Asteroid Warning Network Timing Campaign: 2019 XS.The Planetary Science Journal,3,156. |
| MLA | Farnocchia, Davide,et al."International Asteroid Warning Network Timing Campaign: 2019 XS".The Planetary Science Journal 3(2022):156. |
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来源：新疆天文台
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