Archaeoastronomical orientation errors:The case of the two Hellenic pyramidals

In archaeoastronomical orientation purposes, employing appropriate software, the star declination (D) is determined from the geographical coordinates of the site, the plate bearing of the horizon point (azimuth, Az), and the altitude of the horizontal point (skyline), with appropriate corrections. Errors to the second of a degree in latitude have not any apparent effect on D, errors in Az and latitude of the skyline, however, transmit significant respective percentage errors in D. This note discusses the impact of such error variation on all parameters involved in archaeoastronomical orientation, and presents the case of two small sized pyramidals in Greece.