Astrolabe Catalogue

 

Front of astrolabe without rete or plates. Click to enlarge
Date 18th century
Place India
Material Brass
Inventory no. 52478
Acquisition Presented by J. A. Billmeir in 1957

Throne

The throne is of the indo-persian type . The throne is attached with a integrated base. Vaguely Moorish arch shaped. Undecorated except for a vertical line through the center..

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). Bent rod, not soldered at joint.

Shackle

Shackle of the omega type (i.e. Ω-shaped shackle). This shackle takes the shape of an elipse..

Mater

The mater and limb are of one-piece construction. . Scales on the limb:
Type Range & Units Numbered Geometry Location
Degree N/A Degrees of arc Not numbered degrees Circular, concentric None

Womb


The womb is engraved for 27°; there are no other tympans for this instrument.

Almucantars

Divisions Labelled Style
Divided every 2° from 0° to 90° Plain line.

Azimuths

Divisions Labelled Style
Divided every 6°  Plain line.

Circles

Type Labelled Style Notes
Equator Plain line.
Tropic of Cancer Plain line.
Tropic of Capricorn Plain line.

Lines

Type Labelled Description
Meridian line
Horizon rectus
Horizon obliquus
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