In sci.space.policy AA Institute wrote:
Herb Schaltegger wrote in message ...
In article ,
(AA Institute) wrote:

If the perigee of the asteroid's orbit is 40,000 km and say the apogee
is 200,000 km then that may be a safe option. If the apogee goes much
above 250,000 km then there's the Moon's perturbing influence to worry
about, since it orbits at around 380,000 km.

There's ALWAYS the Moon's perturbing influence to worry about. Have you
ever done any three-body problems?

Not really, but I do fully appreciate that anything other than 2-body
does not have a 'closed' analytical solution. (If you've ever been in
a 'love triangle' then you'll know exactly what I mean!)

There's a reason they can't be done
analytically, you know.

I wonder if NASA or other space authorities have done any ring
modelling around the Earth... perhaps the question never cropped up
before. I certainly think a twisted idea like carving out an asteroid
in orbit is probably outside the normal *appropriate* rules of conduct
in spaceflight research!

Google "how the moon was formed".