European Cubesats Successfully Communicate After Launch
Two European cubesats, Juventas and Milani, have sent signals confirming they are operational and en route to the Didymos-Dimorphos binary asteroid system. This is part of the European Space Agency’s (ESA) Hera mission, which is investigating the aftermath of NASA’s Double Asteroid Redirection Test (DART) impact that altered the orbit of Dimorphos around Didymos.
The Mission of Cutaway Cubesats
The Hera mission is unique as it combines the wonders of the cubesat technology with the dedicated stride of an asteroid exploration craft. Two high-tech cubesats named Juventas and Milani are accompanying Hera, with each designed to carry out specific tasks: Juventas for a radar study of Dimorphos’s interior and Milani to prospect for minerals to determine the asteroid’s composition.
Commissions and Initial Checks of the Cubesats
ESA engineers, under the leadership of Franco Perez Lissi, successfully commissioned the cubesats with a series of tests. These tests ensured that each cubesat’s on-board systems, including avionic platforms, instruments, and inter-satellite links, were functional. Additionally, the cubesats were successfully spun up and down their reaction wheels to maintain attitude control during their journey.
How Close is Too Close?
The primary advantage of using these smaller, independent probes is that they can venture closer to Dimorphos than Hera can safely go. This significantly increases the likelihood of gathering detailed scientific data. If something were to go awry, it would limit the damage to just one cubesat rather than the entire mission.
Building Partners and Logistics
Juventas was built by a Luxembourg company called GOMspace, while Milani was produced by the Italian firm Tyvak International. Both companies remain involved in the operation of their respective cubesats as they near Dimorphos, ensuring continuous data collection and real-time analysis.
Logistics of the Mission
The data from Juventas and Milani is transmitted to ESA’s European Space Operations Centre (ESOC) in Germany and the Cubesat Mission Operation Centre (CMOC) in Redu, Belgium. This telemetry data is then studied by the scientists at GOMspace and Tyvak’s centers before any new commands are relayed back through the command chain.
Scientific and Planetary Implications
Hera, alongside its cubesat passengers, is embarking on a pioneer mission to perform the first detailed scientific study of a binary asteroid system. This endeavor is critical as binary asteroids compose up to 15% of all known asteroids and understanding their formation, composition, and potential dangers to Earth is of paramount importance.
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