I suspect that is the altitude of geostationary orbit. IIRC it is about 42,000 kms.
ETA: 32,786.
http://en.wikipedia.org/wiki/Geostationary_orbit has cool gifs to show this.
Probably a lot of the dots there are satellites, not debris.
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I guess maybe counterforces of the moon and sun make that a particularly good distance to get stuck in orbit.
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You might be thinking of Lagrange points.
http://en.wikipedia.org/wiki/Lagrange_points
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Shut up and hug. MoreThanPretty, Nov 5, 2008.
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Last edited by ZenGum; 09-22-2011 at 08:16 AM.
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