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Asteroid warning! Space junk the size of Empire State Building leaves scientist on alert
2021-08-13 00:00:00.0     每日快报-科学     原网页

       Asteroid Bennu is considered the second most hazardous known asteroid in the solar system. However, experts pointed out it is unlikely to collide with the Earth before 2182.

       The C-type asteroid was first discovered in 1999.

       According to researchers at NASA, chances of a crash have increased and are now between 1 in 2,700 (about 0.037 percent).

       NASA confirmed the OSIRIS-REx spacecraft was deployed to monitor the asteroid’s movements.

       The study, titled Ephemeris and hazard assessment for near-Earth asteroid (101955) Bennubased on OSIRIS-REx data, revealed there is an overall probability for collision on September 24, 2182.

       However, experts believe no further action is needed.

       Earlier this week, planetary scientist Lindley Johnson of Nasa’s Planetary Defense Coordination Office said at a press briefing: “I don’t think we need to do anything about Bennu.”

       During a mission in late 2020, the OSIRIS-REx spacecraft collected a sampled from Bennu.

       From the sample, it was it was deduced that the asteroid is very dark and ancient.

       NASA's study is published in the journal Icarus.

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标签:综合
关键词: Asteroid Bennu     spacecraft     C-type     discovered     OSIRIS-REx     NASA's     Ephemeris     experts    
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