NASA’s Neil Gehrels Swift Observatory reentered Earth’s atmosphere over North Sumatra, Indonesia, on November 4, 2026, at 7:39 a.m. EST (12:39 UTC). U.S. Space Force tracking data placed the reentry near 3° N, 99° E; NASA later confirmed the report. The event ended nearly 22 years in orbit for the observatory, launched in November 2004 for a two-year mission.
Why Swift descended
Solar activity expanded Earth’s upper atmosphere, increasing drag on Swift and hastening its orbital decay. The observatory had no engine to raise its orbit.
NASA also funded a $30 million rescue attempt by Katalyst Space Technologies. Its robotic spacecraft, LINK, developed orientation-control problems, and NASA called off the planned capture on August 19, 2026. That effort had aimed to boost Swift’s orbit; it was separate from the atmospheric drag that lowered it.
What Swift accomplished in orbit
Swift was built to detect and locate gamma-ray bursts, alert other observatories, then turn its telescopes toward the bursts. That rapid-response sequence typically took about a minute, according to S. Bradley Cenko, Swift’s principal investigator at NASA’s Goddard Space Flight Center.
NASA figures reported for the mission count more than 2,000 gamma-ray bursts observed and more than 1,400 supernovae studied. Swift data also contributed to about 7,000 scientific papers. NeoTeo previously covered the end of Swift’s science mission.
