# Depressurization in space

My first question : lets suppose that a centimeter meteor penetrated the hull of ISS.
Roughly, how much time depressurization would take?

Second, if a small meteor penetrates the spacesuit of an astronaut and wound him in space (with a small puncture like wound), any estimation how much time till he bleeds out? Would that intense blood sprinkle damage the organs as well?

Doug Huffman
Gold Member
ISS is 916 m^3 at 1 atm. At what pressure is 'depressurization'? The hole geometry is the next most influential parameter. With a small enough wound, there is no need for him to bleed out at all.

"At what pressure is 'depressurization'? "

Lower than the Armstrong limit 6.3 kPa.

"The hole geometry is the next most influential parameter. " I thought about a really nasty situation of an eye damage.
So a wound with a similar diameter as the eye.

"human skin is tough enough to withstand the drop of one atmosphere"

Yes, but is there any info, or estimation, what happens if the skin is also damaged? Inner pressure will quickly pump the blood out of the body, is it simple intense bleeding, or somewhat worse (hydrodinamic damages etc)?

ISS is 916 m^3 at 1 atm. At what pressure is 'depressurization'? The hole geometry is the next most influential parameter. With a small enough wound, there is no need for him to bleed out at all.

Can i reasonably expect, that depressurization take a few minutes?
(As pressure falls, less and less force push the air out, i guess it would be some kind of integration.)