Dating the Great Pyramid by the alignment of a single star with a shaft from the Great Pyramid, without any other reference point, is insufficient. The reason for this is that over the eons, many stars will align with one of the shafts. It is akin to providing only the latitudinal position for a place on earth without the longitude. For this reason, the double alignment of such an important star as Betelgeuse provides a stronger basis for dating the Great Pyramid from an archaoastronomical perspective than the alternative of 2600BC when an alignment occurred with a minor star in Orion.

In the year 4420 BC, Betelgeuse (Alpha Orionis) not only aligned with the south shaft of the King’s chamber but was also of the same celestial longitude as the Vernal Point (0 degrees Aries of the Tropical zodiac, also known as the Northern Spring Equinox). The Vernal Point is the intersection of the earth's celestial equator on the ecliptic that is associated with the northern spring equinox. This star must have been very important to the ancient Egyptians because it is the brightest star in the constellation that they associated with their god Osiris.

This is a dating which is further consolidated by a third reference point to the star Iota Draconis, the closest star to the north celestial pole in 4420 BC. This star's declination is marked by an alignment with the Great Pyramid's entrance passage.