Lagrangian Station in KSP

[JDCollie]

I want to build a Kerbin-Mun Lagrangian station in my KSP game (similar to the briefly mentioned possible launch location for a VASMIR mission to Mars), but as I understand it, the current KSP physics build doesn't allow for multiple body gravitation dynamics (I.E., no Lagrangian points.)

Is that accurate? If so, would the N-Body system that has been kicking around in the Add-On Development section of the mods fix this? (Not sure this is the right section for this, but it seemed like there are a enough smart/educated people in this section to know )

[sojourner]

Can it be done in the game currently? No.

Would a mod allow it to be done? Depends on how the mod is written. You'd be best off asking the writer of the mod.

[Godot]

I want to build a Kerbin-Mun Lagrangian station in my KSP game (similar to the briefly mentioned possible launch location for a VASMIR mission to Mars), but as I understand it, the current KSP physics build doesn't allow for multiple body gravitation dynamics (I.E., no Lagrangian points.)

Is that accurate? ...

Yep ... at the moment all gravitation is determined by spheres of influence ... you are in the SOI of one body and your spaceship/station is influenced by this bodys gravitation (and only by this bodys gravitation).

Else, I am sure, our stations and satellites orbits wouldn´t be as rock stable as they are now (but rather be influenced by the gravitation of Mun and (to a much lesser degree) Minmus)

[Ralathon]

You can't have anything in L1 or L2. But you can pretend to have a station in L3, L4 and L5 by putting the station in the exact same orbit as the mun.

That mod would fix it (Lagrange points are one of the more obvious results of n body physics). But I don't know how well it works. I don't think N body physics should be implemented in KSP anyway. Station keeping isn't my definition of fun.

[pellinor]

The stable Lagrange points (L4 and L5) are also (neutrally) stable in ksp.

The main difference is that in ksp also any other point on the mun's orbit is neutrally stable as long as it is out of its SOI. So ksp has a lot more stably points than n-body physics.

Edit: right, didn't think of L3. This is also stable in ksp and unstable in reality.

[JDCollie]

I was thinking that L3, 4, and 5 looked like I could at least simulate them stably in KSP. Thanks for the replies guys

Also, L3 is unstable in reality?

[Ralathon]

I was thinking that L3, 4, and 5 looked like I could at least simulate them stably in KSP. Thanks for the replies guys

Also, L3 is unstable in reality?

All lagrange points except L4 and 5 are unstable. You need station keeping for objects to remain in them. Not much, but you can't stick something there and expect it to still be there in 10 years.

L4 and 5 are stable though. Jupiter is a good example for this, it has 2 big swarms of asteroids stuck in its L4 and L5.