25/08/2026
๐ Solving Space Debris in Orbit: KAIROSPACE double-speeds satellite decay with a 0.25U Origami System!
๐ฐ๏ธ 3+ years in space, 180 km descended โ real on-orbit proof of a zero-debris future for CubeSats.
South Korean space company KAIROSPACE has successfully demonstrated the operation of its passive deorbit system (DORB) for small satellites. After activation aboard the KSAT3U spacecraft, the satelliteโs orbital decay rate approximately doubled, while the spacecraft continues to operate successfully in orbit.
๐ก๏ธ The system is designed to accelerate the removal of satellites from low Earth orbit after mission completion or in the event of a malfunction. Acting as a passive braking mechanism, it increases aerodynamic drag and accelerates natural orbital decay. The system architecture ensures activation even during a complete spacecraft malfunction.
๐ฐ๐ท About the Mission & Spacecraft
KSAT3U is a technology demonstration satellite developed entirely by the KAIROSPACE team and launched aboard South Koreaโs Nuri (KSLV-II) launch vehicle in May 2023. The 3U CubeSat has remained operational throughout more than three years of on-orbit testing.
๐ Flight & Orbital Decay Performance
Initially inserted at ~550 km altitude, KSAT3U lost only 30 km during its first year (descending to 519 km). Following DORB deployment, orbital decay accelerated substantially:
Lost ~80 km during its second year
Lost ~100 km during its third year
๐ The seven other satellites deployed together with KSAT3U remain at altitudes 45 to 100 km higher, experiencing significantly slower natural decay.
๐ก Trackable via the NORAD catalog (ID: 56746), KSAT3U is expected to complete its mission within the next six months, reentering Earthโs atmosphere and burning up safely.
๐ ๏ธ About the Deorbit System
Occupying only 0.25U when stowed, the DORB device consists of an inflatable structure made from metallized polymer film. Activated by a compact chemical gas reaction, it uses origami-inspired folding to efficiently package a large surface area, increasing drag and shortening spacecraft lifetime.
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