Astrolabe Catalogue

Throne, Ring and Shackle

The throne is of the indo-persian, engraved type made of brass attached with integrated base made of brass and has a simple, round cross-section ring made of brass and omega type shackle made of brass . More information

Mater

The mater and limb are of one-piece construction. The tab to hold the tympans in place is located at the bottom of the instrument, 180° from the throne.. Scales on the limb: declination scale. More information

Back

The back contains 13 scales of the following types: Altitude; Declination; Sine/Cosine; Cotangent; Terms; Zodiacal signs; Faces; Lunar Mansions; Shadow square. The back is inscribed: with a maker's signature marked as صنعه عبد الائمة (Made by ʿAbd al-Aʾimmah.). Inscription in cartouche within shadow square. More information

Rete, Pin & Horse

The rete contains 0 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. More information

Plates

There are 4 plates with latitudes ranging from 22°0' to 38°0' . More information

Rules & Alidades

Type	Details
Alidade	Double-ended. The rule is not original. The alidade does not appear to be original - the brass has a different sheen to it and the general construction seems at odds with the rest of the instrument..

More information