Misión de rescate de observatorio NASA fracasa; Swift reingresará a la atmósfera este año

A rescue mission that was supposed to save a decades-old space observatory has collapsed. The Neil Gehrels Swift observatory, a workhorse of NASA's astrophysics program for nearly twenty-two years, will now fall back to Earth and burn up in the atmosphere sometime before the end of this year. The satellite designed to save it, a experimental craft called LINK built by Arizona-based Katalyst Space Technologies, has proven unable to do the job.

Swift has been losing altitude steadily, pulled downward by atmospheric drag that intensifies with solar activity. The observatory was never designed to be serviced in space, which made the rescue attempt itself a bold and risky undertaking. LINK was supposed to rendezvous with Swift, attach to it, and boost it to a higher, safer orbit. The plan was audacious enough that even before launch, the teams involved acknowledged they might fail. In July, just weeks after LINK lifted off aboard a Northrop Grumman Pegasus XL rocket on July 3rd, the satellite began spinning out of control. Katalyst managed to regain command, but the loss of time meant the planned meeting with Swift would be delayed by roughly a month. At first, that setback seemed manageable. This week, NASA and Katalyst announced it was not.

The problem was persistent: LINK's orientation control systems could not be made reliable enough to attempt the delicate docking maneuver. Without that capability, the rescue was impossible. "Due to problems persistent with attitude control," the agencies said in their Wednesday statement, LINK would not be capturing or elevating Swift. The observatory's scientific mission will end when it disintegrates on reentry, likely in the final months of 2026.

NASA administrator Jared Isaacman framed the failure as a calculated risk that was worth taking. "The NASA must be willing to act quickly and assume intelligent risks when the possible benefit justifies it, and that is exactly what we did with this mission," he said. "This is not the outcome we were working toward, but it does not change the reason why it was worth attempting this mission. The team acted with extraordinary speed to give Swift the chance to do more science, while developing capabilities that the United States will need for satellite maintenance in the future."

Katalyist had designed, built, tested, and launched LINK in nine months—a compressed timeline that reflected the urgency of Swift's situation. The company's chief executive, Ghonhee Lee, acknowledged the high-risk nature of the undertaking. "We accepted this challenge of high risk and high reward and we are proud of the milestones we achieved along the way," he said. "We have already learned a great deal, and now our work is to turn those lessons into something lasting: develop a repeatable procedures manual that serves as a reference for future operations of encounter, proximity, and maintenance of satellites."

The mission will not end in complete failure. LINK will still attempt to meet Swift, but now as a demonstration rather than a rescue. The satellite will try to approach the observatory, study its structure, and identify the best points where a future servicing vehicle might attach. That reconnaissance work, originally planned as a preliminary step before the boost maneuver, will now be the entire purpose of the encounter. The data gathered could prove invaluable for designing satellites that can be maintained and repaired in orbit—a capability the United States space industry has never fully developed.

Swift itself has been a remarkable instrument. Launched in 2004, it was designed to observe gamma-ray bursts and other transient cosmic phenomena, pivoting rapidly to catch fleeting events in the sky. It has functioned as a multipurpose astrophysics tool in low Earth orbit, contributing to discoveries across the field. No replacement observatory with its capabilities is currently in development or waiting in the wings. NASA will rely on the rest of its active observatory fleet to fill the gap left by Swift's departure and will continue to prioritize finding new ways to respond quickly to cosmic events.

Shawn Domagal-Goldman, director of NASA's Astrophysics Division, noted that the lessons learned from this attempt, even in failure, have already strengthened the American space industrial base. "Building, testing, and operating this mission has already strengthened the supply chain of the American space industry and has advanced the capabilities of space maintenance in entirely new ways," he said. The effort to save Swift, even though it will not succeed, has moved the nation closer to a future in which satellites can be repaired, refueled, and upgraded in orbit—a future that will define the next era of space exploration.