Right Ascension Measurement Reference

I figured out a workaround to get my right ascension where I want it.

I put a spacecraft in a circular orbit at an inclination of 90 deg with its right ascension at 126.05 deg (same as Luna) and at the altitude I would like. I then switched to my main spacecraft and got it into a circular orbit with inclination of 0 deg. I made the reference craft’s orbit visible, and burned normal when I crossed the reference orbit’s AN until my right ascension and inclination matched Luna’s.

@SamTheFox What I’m trying to do is get my spacecraft’s orbit to have the same right ascension and inclination that Luna does. Without knowing where right ascension is being measured from, and without being able to measure where my spacecraft is relative to that reference direction, there’s no easy way to do it.

So if my spacecraft is in a circular orbit around Droo and under the spacecraft’s orbit details it gives me a right ascension of 100 degrees, what is that being measured from? The ascending node is 100 degrees from what? Is there any way to tell my spacecraft’s longitude from this reference point?

imagine a horizontal ellipse, with a star to one of the ellipse's foci

place a vertical line on the star

the points where the line intersects the ellipse is where the right ascension should be

if the planet is orbiting clockwise (relative to the star's north pole), the right ascension will be on the upper point of the line, and vice versa for counterclockwise