An observation just made (probably missed it earlier because of blindness)

I have just been analyzing the Tropic and Cancer and came to the realization that according to the figures given by hrst1 the latitudes of at least The Giza Pyramids seem to be EXACTLY 6 degrees north of where the Tropic of Cancer was in the year in which he suggests each part was built.

It this is correct then simply by getting the latitude of a corner and subtracting 6 and checking our polar orbital parameter listings [data.giss.nasa.gov] we can determine, at least to the year, when it was built.

For example according to Wiki centre of G1 is 29°58'45"N 31°08'03"E or 29.97916667° North latitude. Checking our chart we see that subtracting 6 gives us 23.97916666° and going to the chart we see that this angle occurred in or between 2550 to 2549 BC .

-2550 0.018285 23.9792 205.886
-2549 0.018284 23.9791 205.903

Thus could we surmise that the centre latitude of G1 was constructed between 2550 and 2549 BC ?

I believe this is what hrst1 has discovered. However he has gone further by tying in the actual movement of The Tropic of Cancer and coming up with the cubit used for each building. To my mind this is a lot more logical and concise and meaningful than any dating system yet devised for these structures.

regards
db

"There is nothing as impenetrable as a closed mind"
and ..." if everything is a coincidence what is the point of studying or measuring or analyzing anything ?" db