Astrolabe Catalogue

 

Front of astrolabe without rete or plates. Click to enlarge
Date 1587/8 (A.H. 996)
Maker Muḥammad Amīn ibn Amīrzā Khān
Place Persia
Material Brass
Inventory no. 52399
Acquisition Presented by J. A. Billmeir in 1957

Throne

The throne is of the indo-persian, broad type . The throne is attached with a integrated base. The throne is devoid of any inscription or other decoration..

Ring

The ring is of the simple, round cross-section type (i.e. simple plain ring made from a round rod or piece of metal).

Shackle

Shackle of the omega type (i.e. Ω-shaped shackle). .

Mater

The mater and limb are of one-piece construction. The tab that holds the tympans in place is located at the bottom of the instrument, 180° from the throne.. Scales on the limb:
Type Range & Units Numbered Geometry Location
Degree 0 - 360 Degrees of arc Every 5 degrees Circular, concentric None

Womb


Contains a gazeteer..
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