Thank you Chris for this information. Until I can get an astronomy program up and running, would you also give the altitudes of Sirius and Kochab in 2560 BC ?

I have been supportive of the OCT for many years, largely because the Khufu shafts more or less point to meaningful stellar targets. I suppose I'm a bit like Noel Coward who, on being asked how to make a Martini, poured gin in a glass and waved it in the general direction of Italy. Along the way I have learned that Bauval and Spence's precise correlations do not work because they give a spread of dates. However others have suggested that, near their terminations, the shafts bend more precisely to align with their stellar targets in 2560 BC.

However, as noted above, data for the Queen's Chamber shafts remains very vague (although I imagine the Djedi team are sitting on very precise data which they are not inclined to release) and so nothing can be concluded. KC south needs no correction stellar wise, but it is difficult to extract a meaningful adjustment in angle for KC north from Gantenbrink's writings. Even worse I assumed that Petrie's KC exit levels had been revised on the basis of Gantenbrink and Legon's comments but now apparently not - are we then back to Petrie's figures?

By the way, is this diagram broadly correct? -