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"The Papyrus Fouad inv. 267A, a document of exceptional importance for the history of ancient astromony, consists of a fragment of a treatise written in Alexandria around 130 A.D. The preserved part, which occupies the recto and verso of a single folio, deals with the Sun, whose longitude is calculated according to three different years: the sidereal year, the "mean year" of 365 and 1/4 days, and the tropical year."-- Provided by publisher.

Greek papyri --- Griekse papyri --- Handschriften [Griekse ] (Papyrus) --- Manuscripts [Greek ] (Papyri) --- Manuscrits grecs (Papyrus) --- Papyri [Greek ] --- Papyri [Griekse ] --- Papyrologie --- Papyrology --- Papyrus grecs --- Astronomy --- Astronomy, Greek. --- Astronomie --- Astronomie grecque --- Early works to 1800 --- Ouvrages avant 1800 --- Hipparchus, --- Société Fouad I de papyrologie (Cairo, Egypt). --- Sun --- Soleil --- Observations --- Astronomy, Ancient --- Astronomy, Greek --- Société Fouad I de papyrologie (Cairo, Egypt) --- Academic collection --- Société Fouad I de papyrologie (Cairo, Egypt). --- Astronomy [Greek ] --- Manuscripts --- Astronomie grecque. --- Astronomy, Ancient - Early works to 1800 --- Hipparchus, - active 190 BC-127 BC --- Sun - Observations - Early works to 1800