Not sure about the distance. Long time since I measured it. But yes - very much pre-planned. What we have here is the three most outer 'nodes' of the Giza pyramid field forming a circle upon which we find the Sphinx sits right on the formed circle.
The red line (the 'Lehner-Goedicke Line') represents a precession timeline (half cycle of 12960 years - a pendulum swing in the other direction between the 2 culminations of Orion's Belt gives us a complete cycle of the classic 25,920 Great Year). The centre of G2 to the Sphinx intersects the Precession Timeline at 17,820.
The equation you missed (spotted by my co-author of 'The Giza Prophecy', Gary Osborn) goes like this:
23420 - 17820 = 5,600 years
17820 - 10460 = 7,360 years
This is to say that the intersection point in my diagram splits the Precession Timeline thus 7360:5600 years.
And, as Gary pointed out to me, 7360 / 5600 = 1.314285714285714.
Compare with Pi approximation of 22 / 7 = 3.142857142857143.
Edited 1 time(s). Last edit at 10-Jan-19 14:16 by Scott Creighton.