Astrolabes /
Browse / 42730
| Date | 1634/5 (A.H. 1044) |
| Maker | Qā’im Muḥammad ibn ‘Īsa |
| Place | Lahore |
| Material | Brass |
| Inventory no. | 42730 |
| Acquisition | Presented by Lewis Evans in 1924 |
The large number of seven double-sided plates with this astrolabe covers a very wide geographical range, though with the concentration of latitudes in the 20s and 30s. Some of the plates are constructed with a pair of latitudes on a single face. These composite plates include one for the equator and the pole (that is, 0° and 90°).
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detailed provenance for this astrolabe
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: degree scale. More informationBack
The back contains 19 scales of the following types: Altitude; Cotangent; Zodiacal signs; Lunar Mansions; Calendar; Sine/Cosine; Ecliptic; Shadow square; Terms; Faces; Triplicities; Altitude of noon sun. More informationRete, Pin & Wedge
The rete contains 0 stars. The zodiac on the rete is labelled: الحمل , الثور , الجوزا , السرطان , الاسد , السنبله , الميزان , العقرب , القوس , الجدي , الدلو , الحوت .The rete is inscribed with a maker's signature marked as: صنعت أقل العباد قائم محمد ابن عيسى ابن الهداد اصطرلابي لاهوري همايوني (Work of the least of servants Qāʾim Muḥammad ibn ʿĪsā ibn Allāhdād (or: Ilāhdād), the imperial (humāyūnī) astrolabist of Lahore.). Inscription on the back of the rete.The rete is attached using a pin & wedge. Both are undecorated. More information