File:Tablas Alfonsíes - Lignères (1322) - P142.png

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Captions

Captions

Alphonsine Tables - Area and quantity obscured (eclipsed) of the Sun and the Moon

Summary

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Description
Español: Traducción desde las tablas del año 1322 (Tablas de Alfonso), obra de Juan de Lignères. Agregüé unas columnas en el actual sistema decimal correspondiente al sistema sexagesimal ptolemaico.

Las partes eclipsadas de los discos solar y lunar se presentan en dos subtablas muy similares, que derivan de dos tradiciones diferentes. Ambos están presentes en las Tablas Toledanas: una tradición tal vez dependiente de al-Battānī y (la otra) de la tradición común.

Ambas tienen tres columnas, una para los dígitos lineales de los diámetros de las luminarias, dados como números enteros del 1 al 12. Las otras dos columnas corresponden a la parte eclipsada del Sol y de la Luna, en dígitos de área, dados en puncta y fracciones de ellos, con un máximo de 12. Para mayores detalles, el lector puede consultar Chabás y Goldstein 2012, pp. 174-175.

Como fue el caso de otras tablas para eclipses (Tabla P174, P175 y P176), Juan de Lignères incluyó en su conjunto tablas derivadas de diferentes tradiciones. La presentación y las entradas en ambas tablas concuerdan -salvo errores de los escribas- con las de las Tablas Toledanas (Pedersen 2002, pp. 1450-1451).

La tabla de las partes eclipsadas no se menciona en los cánones de Juan de Lignères.

NdT: del libro "The Tables of 1322 by John of Lignères. An Edition with Commentary" de José Chabás y Marie-Madeleine Saby. Págs. 142-143. 2022, Brepols Publishers n.v., Turnhout, Belgium.
Date
Source Own work basado en los datos del "The Tables of 1322 by John of Lignères. An Edition with Commentary" de José Chabás y Marie-Madeleine Saby.
Author
Fernando de Gorocica  (1962–) wikidata:Q104764450
 
Fernando de Gorocica
Description Argentine amateur astronomer
Date of birth 2 August 1962 Edit this at Wikidata
Location of birth Buenos Aires Edit this at Wikidata
Work location
Ciudad Jardín Lomas del Palomar; Villa Gesell Edit this at Wikidata
Authority file
creator QS:P170,Q104764450

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