Astroscale Japan has selected Isar Aerospace to launch ADRAS-J2, a robotic spacecraft designed to capture and deorbit a three-ton abandoned rocket stage. The mission is intended to become the first to remove an existing large piece of orbital debris that was not designed for servicing or retrieval.<\/p>\n
The companies announced the launch agreement on September 1, 2026. ADRAS-J2 is scheduled to fly during Japan\u2019s fiscal year 2027, which runs from April 2027 through March 2028, aboard Isar Aerospace\u2019s Spectrum rocket from the company\u2019s dedicated launch pad at And\u00f8ya Space in Norway.<\/p>\n
Financial terms of the launch agreement were not disclosed. The award is Isar Aerospace\u2019s second contract with the Astroscale group, following an agreement signed with Astroscale UK in March 2026 for the launch of the ELSA-M end-of-life servicing demonstration.<\/p>\n
ADRAS-J2 is being developed for Phase II of the Japan Aerospace Exploration Agency\u2019s Commercial Removal of Debris Demonstration, or CRD2, program. Astroscale Japan received the Phase II contract in August 2024 after being selected for the work in April of that year. The JAXA contract is valued at approximately 13.2 billion yen, including tax.<\/p>\n
The target is a Japanese upper stage measuring approximately 11 meters long and four meters in diameter, with a mass of about three tons. The stage has remained in low Earth orbit since launching the Greenhouse Gases Observing Satellite, also known as GOSAT or Ibuki, aboard an H-IIA rocket in 2009.<\/p>\n
Unlike satellites equipped with docking plates, grapple fixtures or other cooperative servicing interfaces, the stage was never designed to be captured after launch. ADRAS-J2 must therefore rendezvous with an uncontrolled object, determine its position and motion relative to the spacecraft, approach without making unintended contact, and secure it using an Astroscale-developed robotic arm.<\/p>\n
After capture, the servicing spacecraft is expected to lower the combined vehicle\u2019s orbit and dispose of the rocket body through atmospheric reentry. Managing the connected stack will be substantially more demanding than maneuvering the servicer alone: the captured stage is much larger and heavier than ADRAS-J2, while its mass distribution and rotational behavior will affect guidance, navigation, control and propulsion planning.<\/p>\n
The removal attempt builds directly on ADRAS-J, the inspection spacecraft flown during Phase I of CRD2. Launched in February 2024, ADRAS-J became the first commercial spacecraft to rendezvous with and perform close-proximity inspection of an existing large debris object.<\/p>\n
The spacecraft autonomously approached the same upper stage, collected detailed imagery, circled it at a distance of about 50 meters and ultimately came within 15 meters. The campaign also validated autonomous collision-avoidance functions\u2014an essential safeguard when operating around a target that cannot communicate, navigate or respond to commands.<\/p>\n
One of ADRAS-J\u2019s most consequential tasks was inspecting the upper stage\u2019s payload attach fitting, the structure ADRAS-J2 plans to use as its capture point. Images showed no significant visible damage and gave engineers information needed to develop the robotic capture sequence. This inspection-first approach reduces uncertainty that would otherwise have to be absorbed by the removal spacecraft\u2019s sensors, control software and robotic system.<\/p>\n
After 293 days in orbit, Astroscale announced on March 25, 2026, that ADRAS-J had completed its primary operations and begun lowering its orbit. The spacecraft is being placed on a trajectory designed to produce natural atmospheric reentry within five years.<\/p>\n
ADRAS-J demonstrated rendezvous and proximity operations, but ADRAS-J2 must progress from observation to physical interaction. That transition creates several additional engineering challenges.<\/p>\n
The servicer will have to estimate the stage\u2019s attitude and rotation using relative-navigation sensors while coping with changing illumination and the absence of active markers. The robotic arm must then contact a suitable structural feature without imparting forces that cause the target to tumble faster or push the two vehicles apart. Following capture, the control system must stabilize a combined object whose dynamics differ sharply from those of the standalone spacecraft.<\/p>\n
Fault management is equally important. Because the upper stage has no cooperative control system, ADRAS-J2 must retain the ability to halt or retreat during the approach if navigation uncertainty, target motion or spacecraft performance moves outside safe limits. Experience gathered during ADRAS-J\u2014including recovery after an autonomous abort maneuver\u2014provides relevant flight heritage, but the capture operation remains an unproven phase.<\/p>\n
Astroscale said ADRAS-J2 is undergoing assembly and manufacturing ahead of launch. Its verification campaign will need to establish that the robotic mechanism, relative-navigation chain and spacecraft control system can operate as an integrated system. Ground testing cannot reproduce orbital contact dynamics perfectly, making simulation, hardware-in-the-loop testing and disciplined validation of off-nominal cases particularly important.<\/p>\n
Spectrum is a two-stage launch vehicle designed and manufactured largely in-house by Germany-based Isar Aerospace. The rocket is designed to place up to one metric ton into low Earth orbit and serve small and medium-sized spacecraft requiring dedicated launch profiles.<\/p>\n
For a debris-removal mission, launch delivery involves more than reaching a nominal altitude. ADRAS-J2 must enter an orbit from which it can efficiently phase toward the target while preserving sufficient propellant for rendezvous, inspection, capture, stabilization and disposal. Errors in orbital plane or injection conditions could increase the time and fuel required to reach the rocket stage.<\/p>\n
A dedicated launch can give the mission greater control over injection orbit and schedule than a rideshare flight organized around a primary payload. That flexibility is commercially relevant for in-orbit servicing missions, whose destinations are determined by existing client spacecraft or debris rather than by the most commonly available rideshare orbits.<\/p>\n
Isar Aerospace plans to conduct multiple Spectrum launches before ADRAS-J2, giving the company opportunities to mature the vehicle and demonstrate reliability ahead of the high-complexity mission.<\/p>\n
The ADRAS-J2 agreement follows Isar Aerospace\u2019s March 2026 launch contract for ELSA-M, a 520-kilogram Astroscale UK servicer intended to capture and remove an end-of-life Eutelsat OneWeb satellite. ELSA-M will work with a prepared client equipped with a compatible docking interface, whereas ADRAS-J2 must capture legacy debris without one.<\/p>\n
Together, the missions represent two distinct segments of the emerging removal market. Prepared servicing can be incorporated into satellite design and constellation operations, enabling more repeatable end-of-life missions. Removing legacy debris requires customized reconnaissance and capture solutions for objects whose condition may have changed after years or decades in orbit.<\/p>\n
ADRAS-J2 will also test more than hardware. A successful mission could inform operational standards, liability arrangements and policy frameworks for active debris removal, particularly when a servicing spacecraft interacts with an object launched by another organization or state. JAXA\u2019s CRD2 structure combines technology demonstration with industrial development, positioning the program as both a space-sustainability initiative and an effort to establish commercially usable Japanese debris-removal capabilities.<\/p>\n
If ADRAS-J2 completes its planned capture and deorbit sequence, it would move active debris removal beyond inspection and controlled demonstrations involving prepared targets. It would also provide one of the clearest tests yet of whether rendezvous, robotics, dedicated launch and disposal operations can be assembled into a repeatable service for cleaning up large legacy objects in low Earth orbit.<\/p>\n","protected":false},"excerpt":{"rendered":"
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