Dating method
Archaeoastronomy
A reading of buildings or pictures against the sky. It can be checked. It can also be made to fit.
What is being claimed
A wall, a row of statues, or a carved animal is said to point at a sunrise, a star, or a date in the sky. Sometimes the claim is only that the builders noticed the sun. Sometimes it is that a carving is a horoscope for one year.
The measurement is the direction on the ground, corrected to true north, set against a sky calculated for a proposed century. A compass reading that was never corrected for magnetic north is not that measurement.
Why a match is easy to overread
The sun rises in a wide arc through the year. Many walls will face some sunrise. A star can be matched to a picture after the picture has been chosen. Constellation names are not the same from culture to culture, so an animal is not automatically that star group.
A roof, a moved pillar, or a rebuilt terrace can remove the sightline the reading needs. If the monument was not open to the sky, a sunrise claim has to say so.
What would make it firmer
A direction measured independently, a sky model that can be rerun, and a date already supported by radiocarbon, inscriptions, or stratigraphy. A match that only works for one chosen figure, or for a century the building’s other dates rule out, stays a hypothesis.