NASA and Katalyst Space Technologies have officially abandoned plans to use an experimental spacecraft to rescue the aging Neil Gehrels Swift Observatory. Persistent attitude-control failures on the intercept vehicle forced the cancellation on August 19, leaving the gamma-ray telescope on an irreversible path toward atmospheric reentry later this year.
An Ambitious Timeline Meets Orbital Reality
The rescue effort always carried steep stakes. When intense solar activity accelerated atmospheric drag, dragging the telescope downward faster than anticipated, NASA turned to Katalyst Space Technologies to attempt an orbital save. The agency awarded the company a $30 million contract in September to repurpose a low Earth orbit demonstration spacecraft into an orbital tug. The resulting vehicle, named Link, was put together in under a year.
That breakneck pace pushed the limits of commercial aerospace engineering. We took on this high-risk, high-reward challenge and are proud of the milestones we reached along the way,
NASA Lee said in a statement, emphasizing that the team already learned a tremendous amount.
Reaction Wheels Fail as Link Enters a Spin
Trouble began shortly after Link lifted off on July 3 aboard a Pegasus XL rocket. While initial post-launch diagnostics appeared promising, the spacecraft ran into severe attitude-control problems by late July. Link entered a multi-axis spin after losing two of its three reaction wheels, while its reaction control system thrusters functioned only partially.
Flight controllers fought back. By early August, ground teams managed to slow the spin from 9 degrees per second down to 1.47 degrees per second by firing the electric thrusters originally intended for orbit adjustment. They subsequently uploaded a new flight software update packed with updated attitude control algorithms designed to maintain stability using remaining actuators. For a brief moment, the recovery appeared to hold.
“We expect the updated configuration to support rendezvous operations and, in the next phase of the mission, attempt to capture and boost NASA’s Neil Gehrels Swift Observatory.”
Katalyst Space Technologies
Yet those fixes proved insufficient for the delicate grapple maneuver. Although neither NASA nor Katalyst elaborated on the precise final failure point, the decision was finalized to scrub the reboost entirely.
Redefining the Mission in Proximity
Rather than walking away, Katalyst and NASA pivoted the mission’s final act. Link will no longer attempt to lock onto Swift and push it to a higher altitude. Instead, the servicing spacecraft will conduct rendezvous and proximity operations in the immediate vicinity of the telescope.
This allows Katalyst to demonstrate valuable on-orbit servicing capabilities for future missions. The Space Development Agency and Defense Innovation Unit subsequently selected Katalyst on August 13 for separate study contracts focused on deorbiting services, underscoring the commercial value of the lessons learned during the tumble and recovery.
Meanwhile, the Swift team has pursued its own innovative survival strategies. Operators previously turned off the telescope’s science instruments to alter its operating profile and reduce drag. As of mid-August, Swift was orbiting at an altitude between 343 and 347 kilometers (216 miles). Below an average altitude of about 185 miles (300 kilometers), any orbit-raising maneuver becomes more difficult.
The End of an Era for a Gamma-Ray Pioneer
Launched in 2004, Swift transformed astrophysics by tracking gamma-ray bursts and other energetic astrophysical phenomena.
The abandoned reboost also carries implications for other aging assets. The cancellation could affect future rescue planning for NASA’s 36-year-old Hubble Space Telescope, which faces similar orbital decay driven by recent solar outbursts. For Swift, however, the clock has run out. The observatory is expected to burn up during atmospheric reentry before the end of the year, closing the book on more than two decades of cosmic discovery.
