A Testable Instrumental Origin for the 51.84° Pyramid Slope
Year: 2026
Type: article
Abstract: This paper presents a testable instrumental explanation for the Great Pyramid’s 51.84° face slope, arguing that the angle originates from a direct stellar altitude measurement rather than geometric abstraction or symbolic numerology. Drawing on the archaeological evidence of the Dixon relics—a cedar lath, copper hook, and dolomite ball recovered from the Queen’s Chamber shaft—the study reconstructs these artefacts as the functional components of a Bronze Age angular‑measuring device, effectively a proto‑theodolite. The paper demonstrates that when assembled according to their archaeological dimensions, the instrument can sight stellar altitudes with accuracy consistent with Old Kingdom surveying practice, a capability explicitly described in the text: “the assembly forms a plumb-line sighting rod… The angular displacement between the rod and the plumb-line yields the stellar altitude” . Using high‑precision ephemerides for 26 November 2570 BCE at Giza, the study shows that the star Regulus (α Leonis) rose along the Sphinx’s eastward sightline at an altitude of 51° 50', a value “indistinguishable from the pyramid’s face slope” . Regulus’ declination at this epoch (+24°) matched the obliquity of the ecliptic, reinforcing its longstanding role as a royal marker. The paper argues that Old Kingdom surveyors could have sighted this altitude using the reconstructed instrument and transferred the resulting angle to architectural frames using the additional laths documented by Gantenbrink’s Upuaut robot. The hypothesis is explicitly falsifiable: the instrument can be reconstructed, its accuracy tested, the Regulus sighting repeated, and the angle transferred to a physical baseline. As stated in the paper, “If the reconstructed instrument reliably produces the pyramid’s face slope from stellar observation, the hypothesis is supported. If not, it fails.” By integrating sexagesimal astronomy, Old Kingdom agricultural seasonality, instrument reconstruction, and architectural implementation, the study offers a unified and empirically testable framework for understanding the pyramid’s design. It reframes Old Kingdom scientific capability and proposes a new paradigm in which monumental architecture encodes measured celestial geometry rather than abstract numerics.
Language: English
Subfield: Archeology (arts and humanities)
Field: Arts and Humanities
Domain: Social Sciences
Open Access status: green
OpenAlex ID: W7204151632