Frequently Asked Questions
- Why do satellites fall from orbit?
- Why does space hardware come apart during reentry?
- Are there examples of objects that have survived reentry?
- How much material from a satellite will survive reentry?
- What is a "debris footprint?"
- Can we predict where debris will land?
- Can we control where debris will land?
- Has anyone been hit by falling debris?
- How fast will debris be moving when it lands?
- What is the overall risk from reentry debris?
- Why do reentering bodies experience extreme heating?
Reentry FAQ:
How fast will debris be moving when it lands?
In general, debris from satellites and rocket bodies will be falling straight down and will impact the ground at relatively low velocities. Just as air will slow a piece of paper more than it will a lead ball, a light piece of debris (such as a bit of insulation) will slow rapidly and hit the ground at a slower speed than a heavier piece of debris. In general, impact velocities will range from about 30 km/hr for lightweight debris to 300 km/hr or more for heavier objects. You might also expect that local winds will blow a light piece of debris more off-track than a heavier chunk. The wind does spread out the falling debris, making it more difficult to find surviving material on the ground.
Further questions? Contact us at cords@aero.org .
