据报道，本周将有一颗小行星掠过地球，预计会是整个2022年接近地球范围最大的一颗小行星。
根据美国国家航空航天局（NASA）近地天体研究中心介绍，这颗名为1989 JA的小行星直径约1.77千米。
如果以地球上的建筑作为参照物，这颗小行星的大小是世界最高建筑哈利法塔（迪拜塔）的两倍。
NASA：一颗小行星将于5月27日掠过地球 直径只有1.77千米
NASA称，太空中有近29000颗近地小行星，但直径超过1千米的小行星只有878颗，1989 JA就是其中之一。
宇宙望远镜公司首席科学官、SETI研究所高级行星天文学家弗兰克·马基斯透露，这颗小行星的速度运行约为每小时48280千米，是子弹在空中速度的17倍。
以这个速度飞行的话，这颗小行星可以在45分钟内绕地球一周。
国家航天局：我国将着手组建近地小行星防御系统
另外值得一提的是，据此前央视新闻报道，国家航天局副局长吴艳华表示，我国将着手组建近地小行星防御系统，共同应对近地小行星撞击的威胁，为保护地球和人类安全贡献中国力量。
吴艳华称，争取在“十四五”末期或者2025年、2026年实施一次对某一颗有威胁的小行星，既进行抵近观测，又实施就近撞击，就改变它轨道进行技术实验，这样为未来人类应对小行星地外天体对地球家园的威胁，真正作出中国新的贡献。
According to @surging news reports, an asteroid will pass by the earth this week, and it is expected to be the largest asteroid close to the earth in 2022.
According to the National Aeronautics and Space Administration (NASA) Center for Near-Earth Object Research, the asteroid, named 1989 JA, is about 1.77 kilometers in diameter.
If the buildings on Earth are used as a reference, this asteroid is twice the size of the Burj Khalifa (the Burj Khalifa), the tallest building in the world.
NASA: An asteroid will pass by the Earth on May 27 with a diameter of only 1.77 kilometers
According to NASA, there are nearly 29,000 near-Earth asteroids in space, but only 878 asteroids over 1 kilometer in diameter, and 1989 JA is one of them.
The asteroid is traveling at about 48,280 kilometers per hour, 17 times the speed of a bullet in the air, according to Frank Markis, chief scientific officer of the Cosmic Telescope Corporation and a senior planetary astronomer at the SETI Institute.
At this speed, the asteroid could orbit the Earth in 45 minutes.
National Space Administration: my country will start to build a near-Earth asteroid defense system
It is also worth mentioning that according to previous CCTV news reports, Wu Yanhua, deputy director of the National Space Administration, said that my country will set up a near-Earth asteroid defense system to jointly deal with the threat of near-Earth asteroid impacts and contribute to the protection of the earth and human safety. strength.
Wu Yanhua said that in the end of the "14th Five-Year Plan" or in 2025 and 2026, a certain threatening asteroid will be carried out, which will not only conduct close observation, but also carry out close impact, and then change its orbit to carry out technical experiments. In the future, human beings will truly make new contributions to China in coping with the threat of asteroids and extraterrestrial celestial bodies to the Earth's homeland.
