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ESA's Hera Mission Will Explore the Smallest Asteroid Yet — After NASA Rams a Probe Into It

D-brief
By Amber Jorgenson
Feb 6, 2019 12:33 AMNov 20, 2019 12:47 AM
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This artist's impression shows ESA's Hera mission looming above asteroid 65803 Didymos. (Credit: ESA - ScienceOffice.org) Asteroid exploration has been all the rage lately, and the European Space Agency (ESA) isn’t missing out on the fun. On February 4, ESA released new details about its upcoming Hera mission — the first spacecraft to explore a binary asteroid. The mission will launch to asteroid 65803 Didymos, a binary pair made up of one large body and a smaller object that orbits around it, in 2023. Aptly nicknamed Didymoon, the smaller of the two stretches just 525 feet (160 meters) in diameter — making it the tiniest asteroid ever targeted for exploration.

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