Astrolabe Catalogue

Throne, Ring and Shackle

The throne is of the indo-persian, pierced 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 that holds the plates stationary is located at the bottom of the instrument, i.e., 180° from the throne. Scales on the limb: degree scale.

The limb is inscribed: with a miscellaneous marked as اللهم صلى على محمد المصطفى وعلي المرتضى والبيوت (؟) فاطمة والسبطين الحسن والحسين وصلى على زين العباد وعلى محمد الباقر وجعفر الصادق وموسى الكاظم وعلي الرضا ومحمد التقى وعلي النقي الزكي والحسن العسكري وصلى على الحجة القائم الدائم محمد المهدي صاحب الزمان صلوات الله عليهم أجمعين. (God bless Muḥammad the chosen and ʿAlī the approved and the families (?), Fāṭimah, al-Ḥasan and al-Ḥusayn, and may He bless Zayn al-ʿĀbid(īn), Muḥammad al-Bāqir, Jaʿfar al-Ṣādiq, Mūsā al-Kāẓim, ʿAlī al-Riḍā, Muḥammad al-Taqī, ʿAlī al-Naqī al-Zakī, and al-Ḥasan al-ʿAskarī, and may He bless the upright, the eternal proof, Muḥammad al-Mahdī, master of the time, may God bless all of them.). Inscription around edge. Note: This is a list of the twelve Shiite Imams. More information

Back

The back contains 1 scales of the following types: Altitude. The back is inscribed: with a miscellaneous marked as غرض نقشيست كه تا باز ماند (The aim of the engraving is that it should remain after me.). In cartouche below shadow square. with a maker's signature marked as نمقه محمد مهدي اليزدي (Embellished by Muḥammad Mahdī al-Yazdī). At bottom edge. 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. The horse is unusually long. More information

Plates

There are 5 plates with latitudes ranging from 22°0' to 45°0' . More information

Rules & Alidades

Type	Details
Alidade	Double-ended. The rule is not original. The lack of decorative elements on the rule as well as the absence of scales suggest that this is a later replacement.

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