Alfonsine tables


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Alfonsine tables

or

Alphonsine tables

(ălfŏn`sĭn), compilation of astronomical data tabulating the positions and movements of the planets, completed c.1252 and printed in Venice in 1483. They were a revision and improvement of the Ptolemaic tables and were compiled at Toledo, Spain, by about 50 astronomers assembled for the purpose by Alfonso X of Castile.
References in periodicals archive ?
They were better than the Alfonsine Tables of three centuries earlier, which had been based on Ptolemy's mathematics-but not much better.
To demonstrate that medieval astronomers could have recognized the unusual nature of this event, the second table on page 48 includes the times that we calculated by hand from a copy of the Alfonsine Tables. For while early scholars lacked our modern concept of tidal forces, they definitely associated tidal ranges with astronomical phenomena.
20-21 Increased tidal range Calculated by Calculated from modern methods Alfonsine Tables Dec.