This is a simple question, but I haven't been able to find the answer on Almighty Google or Orbiter Forum. "Where" is the Earth-moon lagrangian point 1? Is there a certain altitude and inclination to place, say, an L1 depot?
Excellent question.
The L1 point is not a fixed point in space, that is to say a location a specific distance from the Earth or from the Moon.
The L1 point (as you no doubt have read) is where the Earth's gravitational field and the Moon's gravitational field are of equal strength
Ah, now I understand why NASA was unhappy with the L1 scenarios put forth during the development of the CEV.but that doesn't mean you cannot put an object around L1. Look up the subject 'L1 Halo Orbit'
http://en.wikipedia.org/wiki/Halo_orbit
http://en.wikipedia.org/wiki/Lissajous_orbit
These are stable, kind of. Both require a lot of computation to keep station.
Ah, now I understand why NASA was unhappy with the L1 scenarios put forth during the development of the CEV.
I was intending to put a depot at L1, but perhaps I can put a depot into a Halo orbit around L1 instead.
Is there any way to figure out suitable L1 launch windows? All the historical L1 missions have been done at the Sun-Earth L1 point, which obviously doesn't help me very much.