WASHINGTON, March 10, 2026, 18:49 EDT
NASA’s Van Allen Probe A, which retired after nearly 14 years in orbit, was expected to drop back through Earth’s atmosphere Tuesday evening. The U.S. Space Force pegged the re-entry for around 7:45 p.m. EDT. The agency said the bulk of the 1,323-pound satellite should incinerate on the way down, but some pieces could make it through.
The timing is pressing: this re-entry’s happening within hours, and there’s no set target for where debris might hit if it makes it to the ground. NASA’s calculated the odds of anyone getting hurt at roughly 1 in 4,200. That’s low, but not nothing.
The probe’s timeline has been bumped up significantly. NASA initially projected Probe A would re-enter in 2034, but this solar cycle’s especially active solar maximum changed the equation, pushing more heat into the upper atmosphere and ramping up drag on the spacecraft.
Launched back in August 2012, Probe A and Probe B—identical spacecraft—were sent up to explore the Van Allen belts, those charged particle rings circling Earth’s magnetic field and playing a key role in blocking cosmic radiation and solar storms. Originally designed for just two years, both probes kept working until 2019.
Jonathan McDowell, the astrophysicist known for monitoring satellites and launches, described the timing as still unusually uncertain due to the probe’s current orbit. Speaking with Scientific American, McDowell said, “it might already be down, or it might not be down until late Wednesday night.” Scientific American
The big question mark, really, is where the debris might end up. NASA says the reentry window stretches 24 hours before or after the predicted time—no target site, just a moving estimate. That means the breakup route might swing off course right up until the last part of the descent.
Even so, hardware dropping out of orbit isn’t unusual. Darren McKnight, senior technical fellow at space-tracking firm LeoLabs, told CNN, “we get about one object a week” making it back to Earth with surviving debris hitting the ground. KRDO
Marlon Sorge, a debris specialist with the Aerospace Corporation, pointed out there’s been “increasingly more awareness” since 2012 when it comes to reducing what makes it through re-entry. A mission like Van Allen? Today, it would probably get designed with that in mind, he said, given that debris tied to the International Space Station and private rocket firms—SpaceX, Blue Origin—has already landed on beaches, rooftops, and private land. KRDO
Researchers are still tapping the mission’s data. NASA says the archived probe readings remain a valuable resource for studying space weather — the solar activity that can interfere with satellites, power grids, navigation, and communications. Probe B, meanwhile, isn’t likely to re-enter before 2030. NASA and the Space Force plan to update forecasts as tracking data gets sharper.
