Overview
- The Neil Gehrels Swift Observatory is uncontrolled and expected to reenter Earth’s atmosphere around Wednesday, November 4, with U.S. Space Force and NASA estimates clustering near 3:30 a.m. Eastern Time and an uncertainty window of several hours.
- NASA and the Space Force say most of the roughly 1,450–1,500 kg spacecraft will burn up, though dense components such as reaction wheels, tungsten parts, and mirror elements could survive reentry and fall within an equatorial band about 20.6° north to 20.6° south.
- Agencies assess the chance that debris will harm anyone as low, about 1 in 2,100, and will keep refining timing and ground-track predictions as final orbits are measured.
- A rapid, $30 million commercial rescue attempt by Katalyst using the LINK servicing craft failed after attitude and propulsion problems in July, eliminating the near-term option to boost Swift and underscoring technical risks for emergency robotic servicing.
- Swift’s end leaves a vast public science archive from nearly 22 years of observations—more than 2,000 gamma-ray bursts and 1,400 supernovae—that will continue to support research even as the incident prompts renewed attention to debris planning, on-orbit servicing practice, and space-weather impacts on low Earth orbit.