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(原标题: Tagging Bennu)
2023-09-21
浏览次数: 15
2020年10月20日，OSIRIS-REx航天器的手臂伸出并接触了小行星101955 Bennu，此前它小心翼翼地接近了这颗近地小行星布满巨石的表面。这张由探测器的SamCam拍摄的特写照片显示，30厘米宽的采样头（TAGSAM）似乎粉碎了一些岩石，被称为“触碰即走”（TAG）采样事件。这张照片是在距离地球约3.21亿公里的地方与地球表面接触后拍摄的。一秒钟后，航天器从一个瓶子里发射氮气，将大量的本努风化层吹入采样头，收集松散的表面物质。现在，将近三年后的9月24日，周日，小行星本努的样本将抵达地球。样品回收舱将由OSIRIS-Rex航天器在近距离飞越地球时丢弃。降落20分钟后，飞船将启动推进器，绕过地球，继续绕近地小行星99942阿波菲斯运行。
查看原文解释
The OSIRIS-REx spacecraft's arm reached out and touched asteroid 101955 Bennu on October 20, 2020, after a careful approach to the small, near-Earth asteroid's boulder-strewn surface. Dubbed a Touch-And-Go (TAG) sampling event, the 30 centimeter wide sampling head (TAGSAM) appears to crush some of the rocks in this close-up recorded by the spacecraft's SamCam. The image was snapped just after surface contact some 321 million kilometers from planet Earth. One second later, the spacecraft fired nitrogen gas from a bottle to blow a substantial amount of Bennu's regolith into the sampling head, collecting the loose surface material. And now, nearly three years later, on Sunday, September 24, that sample of asteroid Bennu is scheduled to arrive on planet Earth. The sample return capsule will be dropped off by the OSIRIS-Rex spacecraft as it makes a close flyby of Earth. Twenty minutes after the drop-off, the spacecraft will fire its thrusters to divert past Earth and continue on to orbit near-Earth asteroid 99942 Apophis.