In August 2023, the European Space Agency (ESA) reported that the VESPA payload adapter, a target for the upcoming ClearSpace-1 debris removal mission, was likely struck by an untracked piece of space debris. This collision resulted in the generation of additional fragments in the vicinity of the original object. Despite this incident, ESA and its partners have continued to advance the mission, which remains scheduled for launch in 2026.
Background on VESPA and ClearSpace-1
The VESPA (Vega Secondary Payload Adapter) is a 113 kg, two-meter-diameter conical structure that was left in orbit following the 2013 launch of the VV02 Vega rocket from ESA's spaceport in Kourou, French Guiana. This adapter was part of the payload delivery system for the Proba-V, VNREDSat-1, and ESTCube-1 satellites. The VESPA adapter was placed in a gradual disposal orbit with perigee at 660 km altitude and apogee at 790 km, in compliance with space debris mitigation regulations. ([esa.int](
ClearSpace-1 is a pioneering mission developed by the Swiss startup ClearSpace SA, in collaboration with ESA, to demonstrate active debris removal (ADR) technologies. The mission aims to rendezvous with and capture the VESPA adapter, then perform a controlled deorbit to safely reenter the Earth's atmosphere, where both the adapter and the capturing spacecraft will burn up upon reentry. This operation is intended to showcase the feasibility of removing defunct objects from orbit, thereby mitigating the growing issue of space debris. ([esa.int](
Collision Incident and Its Implications
On August 10, 2023, ESA's Space Debris Office was informed by the United States 18th Space Defense Squadron that new objects had been detected near the VESPA adapter. These additional fragments were believed to have originated from the VESPA adapter itself, suggesting a collision with an untracked piece of space debris. The collision likely resulted in a low-energy release of new fragments, increasing the number of objects in the vicinity. However, subsequent observations indicated that the main VESPA adapter remained intact, with no significant alteration to its orbit. ([esa.int](
This incident underscores the challenges associated with space debris management. Collisions between objects in orbit can lead to the creation of additional debris, exacerbating the problem and increasing the risk to operational satellites. The fragmentation event highlighted the relevance of missions like ClearSpace-1, which aim to actively remove debris and reduce the potential for such collisions. ([](
Advancements in Active Debris Removal
The ClearSpace-1 mission is part of a broader international effort to develop technologies for active debris removal. ESA's Clean Space initiative, through its Active Debris Removal/In-Orbit Servicing (ADRIOS) project, has been instrumental in advancing these technologies. The mission's design includes a four-armed "space claw" that will capture the VESPA adapter and guide it back into the Earth's atmosphere for deorbiting. This approach aims to demonstrate the feasibility of removing large debris items from orbit, thereby stabilizing the low Earth orbit (LEO) environment. ([esa.int](
In addition to ClearSpace-1, other entities are also working on debris removal technologies. For instance, the Tokyo-based company Astroscale has been testing its End-of-Life Services (ELSA-d) system, which successfully demonstrated key technologies required for debris removal, including magnetic docking and close approach rendezvous and proximity operations. These efforts are crucial in addressing the growing concern of space debris and ensuring the sustainability of space operations. ([en.wikipedia.org](
Future Outlook
Despite the collision incident involving the VESPA adapter, the ClearSpace-1 mission continues to progress. ESA and its industrial partners are carefully evaluating the event's impact on the mission, with a full analysis expected to take several weeks. The mission remains scheduled for launch in 2026, with the goal of demonstrating active debris removal capabilities and contributing to the mitigation of space debris. The success of such missions is vital for the long-term sustainability of space activities, as they address the risks posed by existing debris and prevent the creation of additional fragments. ([](
Conclusion
The ClearSpace-1 mission represents a significant step forward in addressing the challenges posed by space debris. The recent collision involving the VESPA adapter highlights the urgency of developing and deploying debris removal technologies. As the mission progresses toward its 2026 launch, it is expected to provide valuable insights into the feasibility and effectiveness of active debris removal, paving the way for future efforts to ensure the sustainability of space operations.