The Saros Cycle: Ancient Eclipse Prediction Encoded in the Antikythera Mechanism — E8 Intelligence Research

FINDING: The Saros cycle — 6585.3 days — is the lunisolar period that synchronizes three independent lunar periods (synodic, draconic, anomalistic) to within hours, enabling eclipse prediction; the Antikythera Mechanism encodes this via a Saros spiral with draconic gearing. MATH: - Saros = 223 synodic months ≈ 242 draconic months ≈ 239 anomalistic months - 223 × 29.53059 d = 6585.32 d - 242 × 27.21222 d = 6585.36 d - 239 × 27.55455 d = 6585.54 d - Eclipse recurrence: 6585.3211 days = 18 years + 11 days + 8 hours (or 10/11 days depending on leap years) - Base-60 connection: 223 = 3×60 + 43; 242 = 4×60 + 2; 239 = 3×60 + 59 — all expressible in sexagesimal notation, and the Saros itself is 18 years + 11 days + 8 hours = 18×360 + 11×60 + 8×3600 seconds? No — but the day count 6585.3 = 109.755 hours × 60, and the fractional day 0.3211 = 7.7064 hours ≈ 7h42m — a sexagesimal-friendly remainder. - Antikythera: Saros spiral has 223 cells (eclipse events), with draconic gea Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

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Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-09-30
DOI
https://doi.org/10.5281/zenodo.23052460
Primary Topic
Historical Astronomy and Related Studies
Type
preprint
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The Saros Cycle: Ancient Eclipse Prediction Encoded in the Antikythera Mechanism — E8 Intelligence Research

Andrew Stewart Caldin
Zenodo (CERN European Organization for Nuclear Research)
Historical Astronomy and Related Studies
preprint

The Saros Cycle: Ancient Eclipse Prediction Encoded in the Antikythera Mechanism — E8 Intelligence Research

Andrew Stewart Caldin
preprint en

Abstract

FINDING: The Saros cycle — 6585.3 days — is the lunisolar period that synchronizes three independent lunar periods (synodic, draconic, anomalistic) to within hours, enabling eclipse prediction; the Antikythera Mechanism encodes this via a Saros spiral with draconic gearing. MATH: - Saros = 223 synodic months ≈ 242 draconic months ≈ 239 anomalistic months - 223 × 29.53059 d = 6585.32 d - 242 × 27.21222 d = 6585.36 d - 239 × 27.55455 d = 6585.54 d - Eclipse recurrence: 6585.3211 days = 18 years + 11 days + 8 hours (or 10/11 days depending on leap years) - Base-60 connection: 223 = 3×60 + 43; 242 = 4×60 + 2; 239 = 3×60 + 59 — all expressible in sexagesimal notation, and the Saros itself is 18 years + 11 days + 8 hours = 18×360 + 11×60 + 8×3600 seconds? No — but the day count 6585.3 = 109.755 hours × 60, and the fractional day 0.3211 = 7.7064 hours ≈ 7h42m — a sexagesimal-friendly remainder. - Antikythera: Saros spiral has 223 cells (eclipse events), with draconic gea Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

Zenodo (CERN European Organization for Nuclear Research)
Historical Astronomy and Related Studies
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The Saros Cycle: Ancient Eclipse Prediction Encoded in the Antikythera Mechanism — E8 Intelligence Research — Andrew Stewart Caldin · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS