Short-term Hazardous Asteroid |
| |
| Institution: | 1. Beijing Planetarium, Beijing 100044 China;2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101 China;3. Space Debris Observation and Data Application Center, China National Space Administration, Beijing 100101 China;4. Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023 China;5. Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094 China;6. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049 China;1. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023;2. School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026;3. National Basic Discipline Public Science Data Center, Beijing 100190;1. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023;2. Key Laboratory of Dark Matter and Space Astronomy, Chinese Academy of Sciences, Nanjing 210023;3. University of Chinese Academy of Sciences, Beijing 100049;1. National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing 210042, China;2. CAS Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Nanjing 210042, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;1. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023;2. Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210023;3. School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026 |
| |
| Abstract: | In order to clarify the early warning and response requirements of near-Earth asteroids impact, the concept of “short-term hazardous asteroids” is proposed, that is, near-Earth asteroids with an equivalent diameter greater than 10 meters that may pose a threat to the Earth in the next 100 years. Based on the 756 short-term hazardous asteroids that have been discovered so far, the orbital distribution characteristics of short-term hazardous asteroids are analyzed, and the study shows that their orbital distribution differs from that of general near-Earth asteroids: the semi-major axis of the short-term hazardous asteroids is more concentrated in 1 au, and the orbital plane is more concentrated in the ecliptic plane. On the basis of the quantity model of near-Earth asteroids, a preliminary estimation model for the quantity of short-term hazardous asteroids is established, and the population of short-term hazardous asteroids with potential threat in the next 100 years is predicted. Some specific research on short-term hazardous asteroids is of great significance to the development of near-Earth asteroid search and monitoring strategies. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
