Astrolabes /
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Date | 18th century |
Place | Persia (?) |
Material | Brass |
Inventory no. | 50180 |
Acquisition | Presented by J. A. Billmeir in 1957 |
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detailed provenance for this astrolabe
Mater
The mater and limb are of one-piece construction. At the bottom of the limb, on the inside, there is a small tab to prevent the tympans from rotating.. Scales on the limb: degree scale. More informationBack
The back contains 7 scales of the following types: Altitude; Declination; Sine/Cosine; Shadow square; Cotangent. More informationRete, Pin & Horse
The rete contains 16 stars. The zodiac on the rete is labelled: حمل , ثور , جوزا , سرطان , اسد , سنبله , ميزان , عقرب , قوس , جدي , دلو , حوت .The rete is attached using a pin & horse. Plain pin with a crude horse-shaped wedge.. More information
Rules & Alidades
Type | Details |
---|---|
Alidade | Double-ended. This rule is plain and unmarked by any
engravings.. |