The Van Allen Probes, initially known as the Radiation Belt Storm Probes, were launched in August 2012 with a mission originally intended to last two years. Designed to study the radiation belts surrounding Earth, the probes provided valuable data over their operational lifespan.
Prior Expectations
Before the recent reentry, NASA anticipated that the Van Allen Probe A would remain in orbit until 2034, with a forecasted reentry date of March 10, 2026, plus or minus 24 hours. The satellite was deactivated in 2019, and expectations were that most of its components would burn up upon reentry, minimizing any risk to the public.
Decisive Moment
On March 11, 2026, at 6:37 a.m. EDT, the Van Allen Probe A reentered the Earth’s atmosphere over the eastern Pacific Ocean. Weighing 1,323 pounds (600 kilograms), the satellite’s descent marked the end of a nearly 14-year mission.
The U.S. Space Force confirmed the reentry, noting that there was a 1-in-4,200 chance of injury to anyone on the ground during this event. Fortunately, NASA had previously stated that the satellite was not expected to cause any injury or damage.
Expert Perspectives
A NASA spokesperson remarked, “NASA expected most of the spacecraft to burn up as it traveled through the atmosphere, but some components may have survived reentry.” This statement underscores the careful planning and risk assessment that accompanied the satellite’s mission.
While the reentry of the Van Allen Probe A does not indicate an operational failure, it signifies the end of an important chapter in NASA’s exploration of Earth’s radiation environment. The data collected during its mission will continue to inform future research and satellite design.