中国的流星2-in-1计划, 25年发射
美国去年成功搞了一次类似的,就是探测器发射动能”武器“击中小流星,迫使流星改变方向
中国的计划是2合1, 抵近探测和物理打击迫使流星改向
从动用大推力的长征5火箭看,应该是个大计划,会带不少东西和装置,有部分报道说中国还要在小流星采样返回(还未得到中国官方证实)
那就是这种剧情
1) 探测器抵近小流星观测,如果技术成熟,采样
2) 物理打击小流星 (动能,化学能,激光等等), 迫使小流星改道,打击后并跟随小流星,验证打击或改道效果,水平高的话,在打击后采样
这种活动就有实际意义,好听点,保护地球,防止小流星落进地球给地球造成伤害,另一方面就是太空战的演习了。
China will launch 2-in-1 asteroid deflection mission in 2025
By
Andrew Jones
published December 08, 2022
The mission now aims to launch a year earlier than previously planned.
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An artist's depiction of a near-Earth asteroid. (Image credit: Science Photo Library/Andrzej Wojicicki via Getty Images)
China is now looking to launch its first
planetary defense test mission a year earlier than planned and on a larger rocket.
Like NASA did on its recent Double Asteroid Redirection Test (
DART) mission, China wants to test changing the orbit of a potentially hazardous
asteroid with an impactor spacecraft and also accurately measure how much its orbit is altered.
DART partnered with a successor mission from the European Space Agency called
Hera, which is due to launch in 2024 and will study the impact site in detail. China, however wants to attempt both the impact and close observation in one shot. The country first
announced plans for the mission in April and later
revealed that the test would target a space rock known as 2020 PN1, a "potentially hazardous" asteroid roughly 130 feet (40 meters) wide. The mission was to launch on a Long March 3B rocket around 2026.
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Wu Weiren, chief designer of China's lunar exploration program,
told CCTV on Nov. 24 that the new plan will see the mission launch in 2025 atop the larger, more powerful Long March 5 rocket.
"We will launch two probes," he said. "The first one is for surveying. Having studied it [the asteroid] thoroughly after a period of survey, the other one, an impactor, will follow our orders to collide with the asteroid and hopefully divert it three or five centimeters [one or two inches] away from its course."
The spacecraft will launch together, but after separating from the rocket they will enter different trajectories to 2020 PN1. The surveyor will rendezvous with the asteroid first, allowing it to make observations both before and after the planned impact.
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While small, the planned alteration in the orbit would be enough to significantly alter the asteroid's path over time.
"A deviation of three or five centimeters would change the trajectory by over 1,000 kilometers [620 miles] after around three months," Wu said. "The longer the time, the bigger the change of the trajectory."
Wu underlined the importance of being able to eliminate potential threats of collisions with Earth.