Determining the attainability domain of aeroassisted orbital plane change, i.e. the inclination and the longitude of the ascending node, is a very important problem.
17.your position distance 500 metres from intersection of reference line A and reference line B and distance 700 metres to port side of reference line C.
And as the transiting south node makes a conjunction to this point, it's a little like a trash truck that comes along and you can just throw in all of the negative qualities and debris that you've picked up along the way.
If there are no objects between the intersection point and a light source, then that means that the point on the blue stripe is directly illuminated by that light source.
There's another benefit you get by shifting the focus to the center of similarity rather than describing these points as the intersection of external tangents.