Sicily Astrolabe  1102-1103

    Brass astrolabe, composed of four discs, one for the equator (0°) and the others for the sectors 24°-30°, 31°-35° and 32°-36° (all Persia). Approximate longitude of Regulus: 18°. Traced on the back are a sundial and calendar. The object is identified by an inscription in Arabic: Mohammed, son of Abu al Qasim, son of Bakram, in the year 496 of the Hegira (1102-1103).

Dimensions of the object
12, 2 cm

Bibliography
- I Normanni, popolo d'Europa, Roma-Venezia, 1994, Mario d'Onofrio (dir.) , n° 350.

Location
Florence, Istituto e Museo di Storia della Scienza

Photography : DR