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CubeSat will sift asteroid secrets from reflected sunshine

Written by  Wednesday, 30 June 2021 06:59
Milani scans Didymos

As ESA’s Hera mission for planetary defence probes the Didymos twin asteroid system, it will be joined by a pioneering pair of breadbox-sized ‘CubeSats’. Juventas will perform radar soundings while Milani will image the bodies in a wider range of colours than the human eye can see, prospecting the mineral makeup of individual asteroid boulders.

Hera deploying CubeSats
Hera deploying CubeSats

After two years of cruising to the Didymos system, Milani, as the other cubesat Juventas, will be deployed from its mothercraft in a cautious manner, Margherita explains: “It will be partially deployed, exposed to outer space while still interfacing with its deployer, for a period which is in the order of days during which a complete system checkout is performed.”

Upon successful checkout completion, release will follow, at a maximum velocity of 5 cm/s. Any faster ejection would expose Milani to the risks of leaving the Didymos system before the initial, critical propulsive maneoeuvre is executed.


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