>>It’s not encoding any star, but if we reconsider what they are doing then it is "possible" that a star was near the North Pole when construction took place.
Thuban was never on the precessional circle...close but no cigar...likewise with Polaris. However...what is known is Thuban was darn close about 2,700 BC, therefore the Giza site could date back to that era.
If the direction of view was intentional to allow for the observation of Thuban and this event was "after" the point of precession passing Thuban then we simple deduct the time required for Earth to travel 3+ degrees along the precessional circle and that would be 200-250 years. subtract this time from the 2,700 BC and we have 2,600-2,550 BC
Not bad...darn close to what Egyptologists and carbon dating proclaim.
NOTE: Precise Observation of Thuban, as illustrated, would be seasonal<<

Even back in time like at 2700 or 2574 BC Thuban did not align with the descending passageway. It’s altitude then as seen from Giza was (max & min culmination): 30.14 – 29.04 deg and 30.83 – 28.35 deg respectively. Thus even if we go back in time there is no match. A match can only be found if we go into the future. Thus we need to consider something else see below.

>>Ogy:
You missed the point.
If you can imagine placing yourself inside the pyramid at the entrance of the descending passage looking toward north you will see the full view of the northern section of sky. As you venture further down the passage then the area of observed sky is restricted to a point where that is all you do see...a small ”point” of sky. But Earth turns, therefore you will see that small point “encircled” around the true North Pole in a toroidal shape ...”and”...following the precessional circle over the millennium...!
The angle of 26.56 is mathematical, relating to another aspect of the pyramid...you are trying to make it into an observation point for a specific star...as you see...it cannot be attained.<<

I understand what you are saying. Yes the 26.56 deg angle seems to be mathematical tan^1(1/2), I just think that this angle in some way encodes the altitude of Thuban. If at Giza at the time the pyramid was built there is not match with Thuban – descending passageway, and if there is no match in the past, then there is only one option. We check to see where at what altitude there was a match at 2466 BC. Well the answer ties in perfectly with the role of the entrance as entrance to Earth or entrance to the magical world of civilization. At Nekhen – hawk city - Hieraconpolis at 2466 BC the altitude at transit of Thuban was 26.628 degrees. Fine tuning the date so that we have a perfect geometric tan^-1(1/2) = 26.565 deg yields a date of about April 24 2478 BC. From Romer’s book “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.”