Decade-Old NASA Van Allen Probe Satellite Expected to Re-Enter Earth’s Atmosphere

Officials from NASA announced on Tuesday that the spacecraft Allen Probe Ais is expected to re-enter Earth’s atmosphere soon, marking the end of a mission that scientists have been monitoring for more than a decade.

According to officials, the satellite is projected to descend toward Earth’s atmosphere at approximately 5:45 PM MT / 6:45 PM CT on Tuesday. However, experts noted that there is an uncertainty window of plus or minus 24 hours, as tracking becomes more difficult when the spacecraft moves into the thicker layers of the atmosphere.

Scientists say the risk posed by the reentry is minimal, estimating the probability of someone being harmed at roughly one in 4,200.

The satellite was launched in August 2012 along with its twin, Van Allen Probe B, as part of a mission to study the radiation belts surrounding Earth, known as the Van Allen radiation belts. The mission successfully gathered valuable scientific data before officially concluding in 2019.

Initially, experts expected the spacecraft to remain in orbit until around 2034. However, recent developments linked to the current solar cycle accelerated its descent. Scientists explained that the Sun has been producing stronger space-weather activity, including solar flares and coronal mass ejections, after reaching its solar maximum.

This heightened solar activity increased the density and variability of Earth’s upper atmosphere, creating additional drag on satellites in orbit. As a result, the spacecraft’s orbit gradually lowered, eventually pulling it back toward Earth.

NASA officials and space experts emphasised that the chances of harm remain extremely small. Any debris that survives the intense heat of atmospheric reentry is statistically more likely to fall into open ocean rather than populated areas.

Researchers noted that around 70 percent of Earth’s surface is covered by oceans, while large portions of the remaining land are sparsely populated, significantly reducing the risk to people and infrastructure.