欧洲航天局的Hera探测器将在一个月内抵达双小行星系统迪莫弗斯-迪迪莫斯，对美国宇航局2022年DART撞击任务的结果进行后续观测。1Hera于2024年10月7日由SpaceX猎鹰9号火箭从佛罗里达州卡纳维拉尔角发射升空，1经过两年多的飞行将在2026年7月对该小行星系统进行成像。1
这次任务将深入研究DART撞击的影响。DART探测器于2022年以6.6公里/秒的速度撞击了直径151米的小卫星迪莫弗斯，1将其绕行母星迪迪莫斯的轨道周期从原有的11小时55分钟缩短了约32分钟。1迪迪莫斯本身直径780米，每2.1年绕太阳一周。1Hera将利用两颗立方卫星对撞击痕迹、小行星内部结构和周围尘埃场进行详细研究，其中Juventas由卢森堡GomSpace公司建造，Milani由意大利都灵Tyvak International公司建造。1Hera的标称任务周期设定至2027年。1
The European Space Agency's Hera spacecraft will arrive at the Didymos-Dimorphos binary asteroid system within one month to conduct follow-up observations of NASA's 2022 DART impact mission 1. Launched on October 7, 2024, from Cape Canaveral in Florida aboard a SpaceX Falcon 9 rocket, Hera has traveled for over two years to reach its destination 1. The mission will conduct detailed imaging of the asteroid pair, with observations of Didymos scheduled for July 2026 1.
The primary targets of study are Didymos, a 780-meter-diameter asteroid that orbits the Sun every 2.1 years, and its moonlet Dimorphos, which measures 151 meters in diameter 1. The DART spacecraft impacted Dimorphos at a velocity of 6.6 kilometers per second in 2022, reducing the moonlet's orbital period by approximately 32 minutes from its original 11 hours and 55 minutes 1. Hera will investigate the impact site, internal structure of both asteroids, and the debris field created by the collision 1. Two cube satellites—Juventas, built by Luxembourg-based GomSpace, and Milani, constructed by Tyvak International in Turin, Italy—will accompany the mission to provide additional scientific data 1. The Hera mission's nominal operational period extends through 2027 1.
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