rotational velocity, at Giza latitude, is essentially of relevance insofar grinding head-on into the collision (impact location in Asia).
Regarding the figure 1440, it can be associated with duration of a day in minutes. Although an observer may find himself at Giza latitude -- where (as noted by Jim) 21600 miles circumference Earth -- the causeway of G3 however targets the equator. The the celestial object (Sun/d-Orionis) beheld on the horizon, in its line of sight, circumnavigates the Globe -- crawling along the equator -- in the time of Earth completing one revolution underneath that point and returning to its place origin on the horizon. Hence one can appreciate the appropriate original name for G3: the divine pyramid - indeed!
Seen against the horizon also, the ecliptic relates Earth's orbit of the Sun - solstice to solstice. The pyramid builders were proficient in everything concerning planet Earth (degree of arc and nautical distance over time inclusive). Not visible to the terrestrial bound, however depicted in the sky above -- therefore geometrically transferable down below -- Earth's equator & rotational axis locate the Pole -i.e. the prime meridian. The confusion, it would seem, stems from the quest for figures as a means of expressing 'that which already is'...
ps. ref.topic [grahamhancock.com] for 21600 (& other) relevancy
Edited 3 time(s). Last edit at 01-Dec-18 04:15 by hendrik dirker.