Astrolabe Catalogue

 

Front of astrolabe without rete or plates. Click to enlarge
Date ca. 1670
Maker Pierre Sevin
Place Paris
Material Brass
Inventory no. 42680
Acquisition Presented by J. A. Billmeir in 1957

Throne

The throne is of the simple type . The throne is attached with a integrated base. Decorated with engraved foliage..

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). Attached to the throne by a screw..

Womb


This is the only plate for this instrument..
The womb contains 2 scales of the following types:
Type Range & Units Numbered Geometry Location
Degree 0 - 90 Degrees of arc Every 10 degrees Circular, concentric None
Equal hours 1 - 12 Times of day Every 1 hours Circular, concentric None
The womb is inscribed:
Content Translation Notes Type
pour 42 degrez For 42 degrees Latitude
Seuin A Paris Sevin, in Paris Maker's signature

Almucantars

Divisions Labelled Style
Divided every 4° from 0° to 90° Labelled every 4° with   (Modern) numerals Plain line.

Azimuths

Divisions Labelled Style
Divided every 5°  Labelled every 10° with   (Modern) numerals Plain line.

Circles

Type Labelled Style Notes
Equator ♈ ♎ (None in None script) Plain line.
Tropic of Cancer ♋ (None in None script) Plain line.
Tropic of Capricorn ♑ (None in None script) Plain line.

Lines

Type Labelled Description
Meridian line
Horizon rectus
Horoscopic (great) houses Numbered (None in None script) (Modern), Plain line style.
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