A small Colorado company will try, on a $30 million budget and a rocket's last flight, to grab a NASA telescope never designed to be caught.
NASA's Neil Gehrels Swift Observatory has spent 21 years catching the universe's most powerful explosions, the brief, blinding flashes called gamma-ray bursts that mark the births of black holes and the collisions of dead stars. By the end of this year, without help, it will catch fire on the way back through Earth's atmosphere. The mission that was supposed to last two years is dying in a decaying orbit, and the only attempt to save it launches June 27 from a runway in the middle of the Pacific.
Swift's problem is gravity and air. When it reached orbit in November 2004, it circled at roughly 585 by 604 kilometers above the planet, according to NASA's NSSDC catalog entry for the observatory (COSPAR ID 2004-047A). Today, after more than two decades of being dragged by the thin upper atmosphere, it sits closer to 373 by 378 kilometers, and the drag is accelerating, as documented in the Wikipedia summary of the mission's orbital decay. NASA estimates the uncontrolled reentry probability at roughly 50% by mid-2026 and about 90% by the end of the year, numbers put on the record by Shawn Domagal-Goldman, acting director of NASA's Astrophysics Division, in Katalyst's September 2025 announcement of the rescue plan. "No one thought it was going to be possible" to keep it from burning up, he said, in remarks reported by Space.com.
What NASA is trying is a first-of-its-kind robotic rescue. The agency awarded Katalyst Space Technologies, a small Broomfield, Colorado company, a $30 million contract to build, launch, and operate a servicer that will chase Swift through orbit, latch onto a feature on the main structure with a custom capture mechanism, and push the observatory into a higher, more stable orbit. The servicer, called LINK, was designed, built, and tested in roughly eight months, a pace measured in months rather than years for a satellite-servicing mission. As of June 15, LINK was encapsulated inside the payload fairing of a Northrop Grumman Pegasus XL rocket at NASA's Wallops Flight Facility in Virginia.
Pegasus is the only operational air-launched rocket that can reach Swift's low-inclination orbit from a U.S. launch site in time, and on this flight it is also flying for the last time. The rocket will be carried aloft by an L-1011 aircraft nicknamed Stargazer and dropped over Kwajalein Atoll in the Republic of the Marshall Islands, per Katalyst's announcement that it had chosen the Pegasus for the mission. Pegasus has 45 missions on its record with no failures since 1996, and Northrop Grumman is retiring the program, which means the rescue will be the rocket's final flight. If the launch slips, the company's only option is a much more expensive rideshare on a larger rocket that would change the mission's geometry.
The capture itself is the part that has no precedent. Swift was never designed to be serviced. It has no docking ports, no grapple fixtures, and no markings to guide a robot hand. Compare it to the Hubble Space Telescope, which was built to be visited and was repaired five times by Space Shuttle astronauts. Katalyst's mechanism has to find something on Swift's structure, hold on, and not damage an instrument that is still returning data. China has moved a dead satellite with the SJ-21 in 2022. This mission would be the first time anyone has moved an operational NASA science asset, and the first time anyone has tried to grab one that was not built to be grabbed, as the Space.com feature on the rescue plan frames it.
That is the part that drew the people running Swift to publicly back an unusually risky attempt. Brad Cenko, the mission's principal investigator at NASA Goddard, said Swift remains a uniquely capable rapid-response asset in the agency's astrophysics portfolio, the only observatory that can pivot to a gamma-ray burst within minutes and still be doing useful work hours later. Nicky Fox, NASA's associate administrator for science, framed the timeline from contract to launch as "concept to implementation in under a year." For Katalyst's chief executive Ghonhee Lee, the framing is the operational test: going "from development to operations" and, in his words, "putting hands on orbit." All three spoke on the record in Katalyst's June 15, 2026 update on the integrated spacecraft.
The mission is also a stepping stone. Katalyst is already building NEXUS, a larger multi-mission robotic spacecraft with a split Stewart platform robotic arm, rendezvous and proximity-operations sensors, and a pair of standardized payload bays called SIGHT and SHIELD, and the company is positioning the Swift Boost mission as the first operational use of tactically responsive launch. Pegasus's previous responsive-launch demo, TACRL-2, flew for the U.S. Space Force in 2021. General Stephen Whiting, commander of U.S. Space Command, has publicly called "sustained space maneuver" central to resilience and lethality in orbit, language Katalyst cites when explaining why a small commercial rescue is also a strategic data point. The roadmap for that broader platform is laid out on Katalyst's product page for the NEXUS system.
The failure modes are the load-bearing facts. LINK has never flown. Swift was never built for docking. The Pegasus is on its last flight, the budget is capped at $30 million, and the launch window is the rest of this month. If the capture works, Swift gets years of additional science and the in-orbit servicing industry gets a public proof point. If it does not, the next aging telescope still faces the same decision, just with better data about what works and what does not. Either way, the attempt is the news, and the attempt starts on a Pacific runway on June 27.