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

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...

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Main Authors:	Porceddu Sebastian, Jetsu Lauri, Markkanen Tapio, Lyytinen Joonas, Kajatkari Perttu, Lehtinen Jyri, Toivari-Viitala Jaana
Format:	Article
Language:	English
Published:	De Gruyter 2018-09-01
Series:	Open Astronomy
Subjects:	algol horus ancient egyptian astronomy variable stars the cairo calendar hemerologies
Online Access:	https://doi.org/10.1515/astro-2018-0033

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spelling	doaj-1d8da604f7794220b1844390acd6c3742021-09-06T19:40:14ZengDe GruyterOpen Astronomy2543-63762018-09-0127123226310.1515/astro-2018-0033astro-2018-0033Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the ObservationsPorceddu Sebastian0Jetsu Lauri1Markkanen Tapio2Lyytinen Joonas3Kajatkari Perttu4Lehtinen Jyri5Toivari-Viitala Jaana6Department of Physics, University of Helsinki,Helsinki, FinlandDepartment of Physics, University of Helsinki,Helsinki, FinlandDepartment of Physics, University of Helsinki,Helsinki, FinlandDepartment of Physics, University of Helsinki,Helsinki, FinlandDepartment of Physics, University of Helsinki,Helsinki, FinlandMax-Planck-Institut für Sonnensystemforschung,Göttingen, GermanyDepartment of World Cultures, University of Helsinki,Helsinki, FinlandAn 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.https://doi.org/10.1515/astro-2018-0033algolhorusancient egyptian astronomyvariable starsthe cairo calendarhemerologies
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Porceddu Sebastian Jetsu Lauri Markkanen Tapio Lyytinen Joonas Kajatkari Perttu Lehtinen Jyri Toivari-Viitala Jaana
spellingShingle	Porceddu Sebastian Jetsu Lauri Markkanen Tapio Lyytinen Joonas Kajatkari Perttu Lehtinen Jyri Toivari-Viitala Jaana Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the Observations Open Astronomy algol horus ancient egyptian astronomy variable stars the cairo calendar hemerologies
author_facet	Porceddu Sebastian Jetsu Lauri Markkanen Tapio Lyytinen Joonas Kajatkari Perttu Lehtinen Jyri Toivari-Viitala Jaana
author_sort	Porceddu Sebastian
title	Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the Observations
title_short	Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the Observations
title_full	Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the Observations
title_fullStr	Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the Observations
title_full_unstemmed	Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the Observations
title_sort	algol as horus in the cairo calendar: the possible means and the motives of the observations
publisher	De Gruyter
series	Open Astronomy
issn	2543-6376
publishDate	2018-09-01
description	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.
topic	algol horus ancient egyptian astronomy variable stars the cairo calendar hemerologies
url	https://doi.org/10.1515/astro-2018-0033
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Algol as Horus in the Cairo Calendar: The Possible Means and the Motives of the Observations

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