How low can you orbit?

Say, do any of you guys have any idea of how low you can orbit? Or
anything to say about space history?

"Chris Jones" wrote in message
...
Say, do any of you guys have any idea of how low you can orbit? Or
anything to say about space history?

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Jan Philips wrote in message . ..
Some of the early US manned orbital flights orbited only a little more
than 100 miles up. How low can you orbit? What is the relationship
between height and the maximum number of orbits? For instance, if you
go into a circular orbit at 100 miles, how many orbits can it stay in
orbit? Can you orbit at 95 miles? Etc.

Thanks to Henry Spencer putting me on to a new atmospheric model,
I now have a simulator that matches orbital decay graphs in the books
I have (3 sources) to within 25% or so.

If anyone wants to play with it, it is a Java applet at:

http://spacetethers.com/spacetethers.html

See samples 63 to 66. It is easy to try out your own tests.

-- Vince