Astrolabe report (inventory number 50180)

astrolabe, inventory number 50180 from Persia (?), 18th century

Date	18th century
Place	Persia (?)
Material	Brass
Inventory no.	50180
Acquisition	Presented by J. A. Billmeir in 1957

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Throne, Ring and Shackle

The throne is of the indo-persian, broad type made of brass with integrated support(s) made of attached with integrated base made of brass and has a simple, round cross-section ring made of brass and eye-bolt type shackle made of brass . More information

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 information

Back

The back contains 7 scales of the following types: Altitude; Declination; Sine/Cosine; Shadow square; Cotangent. More information

Rete, 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

Plates

There are 6 plates with latitudes ranging from 22°0' to 66°0' . More information

Rules & Alidades

Type	Details
Alidade	Double-ended. This rule is plain and unmarked by any engravings..

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Astrolabe Catalogue