Astrolabes /
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Date | 1789/90 (A.H. 1204) |
Maker | Sayyid ’Abd al-Baqi |
Place | Persia (?) |
Material | Brass |
Inventory no. | 50059 |
Acquisition | Presented by J. A. Billmeir in 1957 |
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detailed provenance for this astrolabe
Mater
The mater and limb are of two pieces, soldered and riveted construction. This instrument has a tab on the limb, inside the mater, to hold the tympans in place rather than a notch in the mater and a tab on the plates. Scales on the limb: equal hours scale; degree scale. More informationBack
The upper right quadrant, where one would expect to find the qibla lines, is blank, suggesting that this instrument was not completed. The back contains 3 scales of the following types: Altitude; Cotangent. More informationRete, Pin & Wedge
The rete contains 38 stars. The zodiac on the rete is labelled: الحمل , الشور , الجوزا , السرطان , الاسد , السنبله , الميزان , العقرب , القوس , الجدي , الدلو , الحوت.The rete contains 1 scale of the following type: Zodiacal signs.
The rete is attached using a pin & wedge. Most likely a replacement. More information