NASA Van Allen Probe A To Reenter Earth Atmosphere Today
NASA says its 1,300‑pound Van Allen Probe A spacecraft, launched in August 2012 to study Earth’s radiation belts, is expected to reenter the atmosphere around 7:45 p.m. Eastern today, with a 24‑hour uncertainty window based on U.S. Space Force tracking. The agency says most of the satellite will burn up on reentry, but some components are likely to survive to the surface; it pegs the risk of anyone on Earth being harmed at about 1 in 4,200, which it characterizes as low. The twin Van Allen probes spent nearly seven years operating in the harsh radiation environment, far longer than their planned two‑year mission, and generated data behind hundreds of scientific publications, including the discovery that a temporary third radiation belt can form during intense solar activity. Mission planners had originally expected the craft to fall back to Earth around 2034, but stronger‑than‑anticipated solar activity in the current cycle increased atmospheric drag and pulled it down more quickly. Probe B is expected to reenter sometime in the 2030s, as space‑debris and deorbit‑planning debates continue to gain attention among U.S. policymakers and space‑safety experts.
📌 Key Facts
- Van Allen Probe A is a 1,300‑pound NASA spacecraft launched in August 2012 to study Earth’s radiation belts.
- NASA, citing U.S. Space Force, expects the satellite to reenter around 7:45 p.m. ET Tuesday, with a 24‑hour margin of uncertainty.
- Most of the probe will burn up, but some debris may survive; NASA estimates a 1 in 4,200 chance of anyone on Earth being harmed.
- The mission, which ended in 2019 when the probes ran out of fuel, lasted nearly seven years and produced discoveries including evidence of a temporary third radiation belt.
- Reentry is occurring earlier than a prior 2034 estimate because a stronger solar cycle increased atmospheric drag on the spacecraft.
📊 Relevant Data
There have been no recorded fatalities from reentering space debris, despite thousands of reentries over the past 50 years.
List of space debris fall incidents — Wikipedia
An average of one cataloged piece of space debris has reentered Earth's atmosphere each day for the past 50 years.
List of space debris fall incidents — Wikipedia
Solar Cycle 25 has been more active than initially predicted, with sunspot numbers exceeding forecasts and maximum activity occurring earlier than expected.
Solar Cycle 25 is more active and powerful than predicted — EarthSky
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