NASA’s Neil Gehrels Swift Observatory is expected to reenter Earth’s atmosphere on November 4, 2026. In its November 2 update, NASA cited a U.S. Space Force prediction of approximately 3:30 a.m. Eastern Standard Time, or 08:30 UTC, with an uncertainty of 11 hours.
The forecast concerns the atmospheric return of a spacecraft whose science operations have ended. Swift weighs approximately 3,200 pounds. NASA expects most of it to burn up during descent, with some components surviving.
Its orbital inclination confines possible surviving-fragment locations to the band between 20.6 degrees north and 20.6 degrees south latitude. The timing of atmospheric entry determines which part of that band lies beneath the spacecraft during its final descent.
NASA estimates approximately a one-in-2,100 chance that surviving material will harm someone on Earth. That figure describes the aggregate probability of harm to a person somewhere within the exposed population, rather than the probability for each individual.
How Atmospheric Drag Ended Operations
NASA’s October 23 mission account explains that increased solar activity intensified atmospheric drag and accelerated Swift’s descent. Even at satellite altitudes, the atmosphere contains enough material to remove orbital energy gradually through drag.
A servicing mission intended to raise Swift’s orbit ended in August without a boost attempt. The observatory then resumed scientific observations after an earlier pause intended to reduce drag and preserve altitude.
Swift observed hundreds of targets during that final period, including stellar explosion remnants, active supermassive black holes, and comets. Returning to normal observations increased drag on the spacecraft.
On October 20, Swift descended to approximately 275 kilometers. It entered safe mode when it could no longer compensate for the drag effects. The operations team at Penn State subsequently commanded the spacecraft to end operations and prepare for reentry.
Nearly 22 Years in Orbit
Swift launched in November 2004 with a two-year prime mission. Its three telescopes observed gamma-ray bursts and other rapidly changing sources across multiple wavelengths, with rapid pointing and alerts that supported coordinated observations by other facilities.
The November 2 NASA statement supplies a more specific reentry forecast than the earlier prediction covered by New Space Economy. NASA and the Space Force are continuing to track the spacecraft and revise the predicted atmospheric-entry time.
