Astrolabe Catalogue

 

Image of the tympan or plate - click for larger version Image of the tympan or plate - click for larger version
Tympan 3b
This plate bears two projections: one for 18° and one for 72°.

Almucantars

Divisions Labelled Style
Divided every 6° from 0° to 90° Labelled every 3° with   (Abdjad) numerals Plain line.

Azimuths

Divisions Labelled Style
Divided every 30°  Labelled every 10° with   (Abdjad) numerals Plain line.

Circles

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

Lines

Type Labelled Description
Horizon rectus
Meridian line
Unequal hours (Abdjad), Dotted line style.

Inscriptions

Transcription Translation Type
العرض يح Latitude 18° Latitude
العرض عب Latitude 72° Latitude
المشرق East Direction
المغرب West Direction
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