Astrolabe Catalogue

Throne, Ring and Shackle

The throne is of the five-lobed type made of brass with integrated support(s) made of brass attached with integrated base made of brass and has a simple, squared cross-section ring made of brass and omega type shackle made of brass . More information

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 information

Back

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 information

Rete, 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

Plates

There is one plate for latitude 11°0' . More information