Calculating the distance of orbital nodes

[Piper]

Does anybody know an equation for calculating the distance of the ascending and descending nodes?

 

[jarmonik]

You need to figure out the Argument Of Periapis first. All thay you need is in Orbiter Manual Appendix C.

Orbital parameter p = a * (1 - e*e), where a=semi-major axis, e=eccentricity.

Orbital radius r = p / ( 1 + e * cos(TrA) ), where TrA=True anomaly of orbit position.

True anomaly of Ascending node is (PI2 - AgP), where AgP=Argument of Periapis.

 

[Piper]

:: slaps forehead ::

Thanks, I had a feeling it was going to be something terribly simple. I knew that I would need the Argument of Periapsis, but I didn't think of applying the true anomaly part and just calculating the orbital radius after that.