NASA has returned the Neil Gehrels Swift Observatory to scientific operations following months in a low-drag orientation, accepting that active observation will accelerate its atmospheric reentry. The decision follows the collapse of a private rescue mission by Katalyst Space, leaving the 21-year-old astrophysics satellite with a projected demise by late 2026.
The Neil Gehrels Swift Observatory is back on the clock, scanning the cosmos for gamma-ray bursts and transient phenomena after months of forced dormancy. But the return to science comes with an explicit expiration date. The agency’s choice to resume observations follows the official collapse of an ambitious commercial attempt to lift the aging observatory out of the decay zone.
The Failed Private Rescue Mission by Katalyst Space
Launched on July 3, a specialized spacecraft named LINK—built by Katalyst Space—was designed to rendezvous with Swift, capture it, and execute an orbital maneuver to push the observatory to a safer altitude above 600 kilometers. Two of the three reaction wheels governing the spacecraft’s orientation system failed, and its cold-gas propulsion system partially broke down. The LINK satellite drifted in an uncontrolled spin, interrupting communications and crippling its ability to dock with Swift. On August 19, NASA and Katalyst formally abandoned the capture attempt. Rather than abandoning LINK entirely, the hardware is now repurposed solely for on-orbit proximity and satellite-servicing technology demonstrations. Katalyst had less than a year to develop the satellite for the Swift Boost mission, which started in early July. Sean Domagal-Goldman, the astrophysics division director at NASA Headquarters in Washington, called it a high-risk, high-reward mission.
This is not the result to which we aimed, but it does not cancel why it was worth trying to conduct this mission. The team moved with incredible speed to give Swift a chance to conduct more scientific observations, while simultaneously developing technologies that America will need to service satellites in the future.
Solar Activity and the Race Against Atmospheric Drag
Swift was originally deployed in 2004 with a planned two-year lifespan, but it surpassed expectations by operating for over 21 years. Because the observatory lacks its own onboard propulsion system, it cannot independently compensate for orbital decay. Recent years brought intense solar activity that heated and expanded Earth’s upper atmosphere, thickening the gas density at low Earth orbit and compounding aerodynamic drag. The agency elected to resume active data collection even though the increased power usage and panel positioning will hasten the descent. Operating the science instruments is projected to cause the satellite to burn up within a month or two of intensified drag, pushing the terminal reentry timeline to late 2026.
Phased Instrument Activation and Scientific Return
On August 26, specialists powered on two of the three main scientific instruments: the X-ray Telescope (XRT) and the Ultraviolet/Optical Telescope (UVOT). These instruments had been turned off back in February to reduce aerodynamic drag. Among their first targets, the X-ray telescope on board the Swift observatory took this picture of the Tycho supernova remnant on August 26, 2026, where bright dots represent X-ray photons and stripes represent image defects. However, the third instrument—the Burst Alert Telescope (BAT), which was turned off in April to save energy and change the orientation of the solar panels—remains offline.
NASA expects to bring the BAT instrument back online within the coming weeks, squeezing every possible observation out of the spacecraft before it reaches an altitude of roughly 300 kilometers, below which orbital decay accelerates rapidly into atmospheric entry.
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