Ogygos Wrote:
> Well the answer ties in perfectly...At
> Nekhen – hawk city - Hieraconpolis at 2466 BC
> the altitude at transit of Thuban was 26.628
> degrees....26.565 deg yields a date of about
> April 24 2478 BC....“The Great Pyramid” I copy:
>
> “From these minute discrepancies therefore, Spence
> estimates that the orientation of the casing
> stones of the eastern baseline of the Great
> Pyramid was set to October 2478, +-5 years, BC.”

Ogy:

From my personal star location calculations...and as accurate as possible with the astro information collected...63.12 degrees of the precessional circle from Polaris.
Setting Polaris 42 years from now to be closest to Earth's processional circle (2050 AD), then if standing at the bottom of the descending passage you would have viewed Thuban at the exact center of the entrance opening in "2470 BC".
I would say that is very close to yours...

Best.
Clive