| 不同测站近地小行星地基观测效能评估研究 |
| |
| 引用本文： | 冒雨萌,赵海斌,李彬.不同测站近地小行星地基观测效能评估研究[J].天文学报,2021,62(6):66. |
| |
| 作者姓名： | 冒雨萌 赵海斌 李彬 |
| |
| 作者单位： | 中国科学院行星科学重点实验室 紫金山天文台 南京 210023;中国科学技术大学天文与空间科学学院 合肥 230026;中国科学院行星科学重点实验室 紫金山天文台 南京 210023;中国科学院比较行星学卓越创新中心 合肥 230026 |
| |
| 基金项目： | 国家自然科学基金项目(11633009), 中国科学院战略性先导科技专项(XDB41000000), 空间碎片与近地小行星防御科研项目(KJSP2020020204、KJSP2020020102), 民用航天预研项目(D020304、D020302)及小行星基金会资助 |
| |
| 摘 要： | 目标的完备性搜索是开展近地小行星预警和防御的前提. 为量化评价近地小行星观测效能, 提高监测设备使用效率, 提出一种综合望远镜参数和测站天文条件的观测效能评估方法. 以观测目标信噪比作为检测指标, 设定检测条件形成目标检测方法, 定义评价指标用于评估近地小行星观测效能. 再基于近地小行星轨道数据和尺度分布模型, 建立近地小行星轨道数据模拟样本库. 最后选取中国科学院紫金山天文台盱眙观测站和中国科学院国家天文台冷湖观测台址, 仿真分析近地天体望远镜对直径0.01--30km近地小行星的观测效能, 结果表明: 不考虑两观测站年有效观测时间差异, 近地天体望远镜在冷湖观测全尺寸模拟样本的效能比在盱眙提高了5.21倍, 其中对1km以上直径目标的观测效能相当, 对1km以下直径目标的观测效能差异开始显现, 对0.1km以下直径目标冷湖优势更显著.
|
| 关 键 词： | 望远镜 近地小行星 观测效能 方法: 分析 |
| 收稿时间： | 2021/4/9 0:00:00 |
Ground-Based Observation Efficiency Evaluation of Near-Earth Asteroids in Different Observation Stations |
| |
| MAO Yu-meng,ZHAO Hai-bin,LI Bin.Ground-Based Observation Efficiency Evaluation of Near-Earth Asteroids in Different Observation Stations[J].Acta Astronomica Sinica,2021,62(6):66. |
| |
| Authors: | MAO Yu-meng ZHAO Hai-bin LI Bin |
| |
| Institution: | Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023;School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026;Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023;Center for Excellence in Comparative Planetology, Chinese Academy of Sciences, Hefei 230026 |
| |
| Abstract: | The searching completion of Near-Earth Asteroids (NEAs) is the premise of planetary defense.%In order to evaluation the observation efficiency of Near-Earth Asteroids, an observation efficiency evaluate method is proposed, which includes telescope parameters and station conditions.In order to quantify the observation efficiency of NEAs, a method for evaluating the observation efficiency is proposed, which includes telescope parameters and station conditions.Considering the signal-to-noise ratio of target and the NEAs visibility model, detect condition and evaluation index are defined to evaluate the observation efficiency. Then, based on the NEAs orbit data and the size distribution model, the simulated NEAs orbit database is established. Finally, two observation stations, Xuyi and Lenghu, are chosen for simulation analysis. The results show that without considering the effective observation time, the observation efficiency of CNEOST (China Near-Earth Object Survey Telescope) in Lenghu increased by 5.21 times than in Xuyi within one month. Compared to Xuyi station, Lenghu station has more advantages in observing smaller NEAs. It could also provide better observation efficiency for targets not found. |
| |
| Keywords: | telescopes near-earth asteroids (NEAs) observation efficiency methods: analytical |
|
| 点击此处可从《天文学报》浏览原始摘要信息 |
| 点击此处可从《天文学报》下载免费的PDF全文 |
|
