Hi Graham,

No, the main evidence for the redating is "The identical peculiarity of the dates analyzed in sections §2–4 to be about one and a half months earlier than would be expected given the actual seasons justifies the conclusion that, in the conventional chronological reconstructions, the age of the OK is underestimated by about two centuries."

As for my astronomically calculated precise dates, they cannot be unambiguously proven due to the fact that, as you correctly noted, they are based on the interpretation of pictorial sources. However, in my opinion, the pattern is quite complex to be a mere coincidence. But I won't insist.

For now, it is enough for me that the OK seasonal data justifies the two century higher age of this period, moving the 4th Dynasty to the time when the OK pole star, Thuban, was closest to the celestial Pole.

Alex.