For the ancient Egyptians, it may have served as the north star.
About 4,700 years ago, when the Egyptians were building the earliest pyramids, Thuban was likely the axis around which all the other stars appeared to spin at night. Some researchers think the pyramids were built to point directly toward Thuban for that reason.
The text of the latter: Astronomical Orientation of the Pyramids
It is interesting that according the first article Thuban is actually a pair of stars in which they can eclipse on another.
Rawlins and Pickering show that Kate Spence had an error in her calculations and according to them the corrected dates:
"This implies dates of 2638 BC for Khufu’s pyramid and 2607 BC for Khafre’s.(Error estimates could be 2–10 years,depending on assumptions regarding the builders’ craftmanship.)"
They also note:
"It seems odd that either method would have been used before the time when it was correct. Because the best pyramid orientations occur for the two greatest pyramids,this could simply indicate that engineering science peaked at the time of Khufu–Khafre. Thuban passed within 0.1of the pole in 2800 BC, a chance event that may have stimulated the historical flowering of celestially based surveying, which was unquestionably used for the pyramids built soon after that at Giza".
As I note in the OP:
Thuban achieved its closest position to true North around 2,830BC remaining within 1 degree of this position for nearly 200yrs.
For repeating again:
The averages of the 1995 RCD study are as follows:
Bent Pyramid-2720 BC
Meidum Pyramid-2705 BC
Abu Roash Pyramid-2804 BC
Abu Roash Temple-2795 BC
G3 2710 BC
While Rawlins and Pickering dates are within this 200yr period of Thuban being within 1 degree of the celestial north pole, the RCD suggest the dates of construction should be pushed back farther still.
Edited 3 time(s). Last edit at 09-Jan-20 04:29 by Thanos5150.