Since it is now 25.19° it might be possible that the descending and ascending passageways refer to Mars. An I think this angle is closer to 26° than 26.5°.
The latitude of Thinis and Abydos might have been chosen for this reason. Dendera also. How about Khufu's statue found at Abydos.
Post Edited (04-Feb-12 23:27)