Airbus has developed the Detumbler, a passive magnetic damping device that stabilizes tumbling satellites after they reach end-of-life. The device weighs 200 grams and uses permanent magnets to dissipate kinetic energy through the Earth's magnetic field, slowing spin rates over weeks to months without requiring power or attitude-control actuators.
Tumbling dead satellites pose a major obstacle to active debris removal missions. Over 36,500 tracked debris objects currently orbit Earth. The ESA warns that without ADR solutions, some low Earth orbit regions will become unusable. Detumbler addresses this by preventing post-mission tumbling before satellites become impossible to capture.
The device works by using a magnetized rotor that aligns with Earth's magnetic field. As a tumbling satellite rotates around this rotor, the conductive housing creates eddy currents that generate magnetic braking torque. This dissipates angular momentum exponentially, eventually reaching a stable state with very low residual spin rates.
Airbus has achieved Technology Readiness Level 8, meaning Detumbler is now commercially available through the Airbus Space Electronics product portfolio. The ESA's Space Safety Program requires detumbling of LEO missions over 500 kilograms, targeting performance of 3 degrees per second to 0.75 degrees per second in less than one year. Detumbler meets these requirements and can work on platforms ranging from approximately 150 kilograms to 1.5 tons.
MDA Space has selected Detumbler for its first MDA AURORA constellation order. When this constellation launches, it will represent the first commercial large-scale integration of passive detumbling in orbit.