Astrolabe Catalogue

Throne, Ring and Shackle

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

Mater

The mater and limb are of one-piece construction. The tab that prevents the plates from rotating is located at the bottom of the instrument. Scales on the limb: degree scale. More information

Back

The back contains 11 scales of the following types: Altitude; Declination; Sine/Cosine; Cotangent; Shadow square; Zodiacal signs; Lunar Mansions. The back is inscribed: with a maker's signature marked as عمل اقم العباد ضيا و الدين ابن قايم محمد اسطرلابى ١٠٦٤ سنه (The work of the least of the servants, the astrolabist Ḍiya ad-Dīn ’ibn Muḥammad, year 1064). More information

Rete, Pin & Horse

The rete contains 37 stars. The zodiac on the rete is labelled: الحمل , الثور , الجوزا , الشرطان , الاسد , السنبله , الميزان , العقرب , القوس , الجدى , الدلو , الحوت.

The rete contains 1 scale of the following type: Ecliptic.
The rete is attached using a pin & horse. The pin is held in place by a rather ornate and life-like horse. More information

Plates

There are 5 plates with latitudes ranging from 22°0' to 66°0' . More information

Rules & Alidades

Type	Details
Alidade	Double-ended. The rule is not original. The alidade is almost certainly a replacement; the metal and the finish are distinctly different from the rest of the instrument.

More information