There are a lot of things that one can check:
1) A new Moon
2) A full Moon
3) A Solar Eclipse
4) Fall Equinox(or an Equinox in general, see Menkaure causeway)
5) The arrangement of planets forming a triad that corresponds to the three sons or the three gods. In this case do these planets mimic the Giza pyramid positions?
6) The fifteenth day of the first month of Peret season
7) The planetary distances encoded in the Westcar Papyrus stories.
Using Stellarium I was not able to find a solar eclipse the year 2640 BC. The year 2612 BC there does seem to be a marginal partial solar eclipse as observed from Giza. When the Moon and the Sun have the same altitude, their azimuth difference is 0.5054 degrees, the apparent Solar diameter being 0.5427 degrees.
This date, October 23 is off the theoretical I Peret 15 date by 3 days(October 20). Its a possibility. But this might not be the only solution. Let's see what this does not agree with. it does not agree with the Fall Equinox(October 13 this year). Note what the story says. We need to add 14 days to this date to see what happens. October 23 2612 BC plus 14 days leads to November 6, 2612 BC. If we keep the time of day the same as the eclipse, then the Moon is 97.8% illuminated and it is not visible. So for there to be a Full Moon we need to see the Moon rise once again and set, and still we have no Full Moon yet. When it sets on November 7, 2612 BC it is 14.5 days old and 99.9% illuminated. It starts to be 100% illuminated at 7:55 pm(below the ground).
It is a bit problematic to consider the three sons to represent 2 planets plus the Moon. Venus follows the Sun it is cannot be considered part of the triad. We thus don't have the Giza pyramid positions to relate to the celestial positions. Finally the planets distances encoded in the WP do not match those of this date.
I have found a solution. What it includes:
1) A New Moon (check)
2) After 14 days during the Night the Moon reaches the Full Moon position before setting at a 99% illuminated state.
3) A Solar Eclipse (one day away from the next Fall Equinox there is a Solar Eclipse)
4) Fall Equinox (see above)
5) The arrangement of planets forming a triad that corresponds to the three sons or the three gods. In this case do these planets mimic the Giza pyramid positions? (check)
6) The fifteenth day of the first month of Peret season (There is a correlation on another day of this year that agrees with this. It is one day off of the day we would expect. It could be used to date the Old Kingdom ideal epoch).
7) The planetary distances encoded in the Westcar Papyrus stories. (check: the two planet distances encoded in the WP (both!) agree with those observed on this day).
The day of this alignment is of religious significance. Also, there are other things that relate to the Moon going on this year!
Also: the three planets follow the Sun. So yes they seem to be born in the West after the Sun sets as you posted.
Edited 1 time(s). Last edit at 08-Feb-20 22:37 by Spiros.