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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access September 19, 2018

Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the Observations

  • Sebastian Porceddu EMAIL logo , Lauri Jetsu , Tapio Markkanen , Joonas Lyytinen , Perttu Kajatkari , Jyri Lehtinen and Jaana Toivari-Viitala
From the journal Open Astronomy

Abstract

An ancient Egyptian Calendar of Lucky and Unlucky Days, the Cairo Calendar (CC), assigns luck with the period of 2.850 days. Previous astronomical, astrophysical and statistical analyses of CC support the idea that this was the period of the eclipsing binary Algol three millennia ago. However, next to nothing is known about who recorded Algol’s period into CC and especially how. Here, we show that the ancient Egyptian scribes had the possible means and the motives for such astronomical observations. Their principles of describing celestial phenomena as activity of gods reveal why Algol received the title of Horus.

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Received: 2018-02-15
Accepted: 2018-05-04
Published Online: 2018-09-19
Published in Print: 2018-09-01

© by Sebastian Porceddu et al., published by De Gruyter

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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