Astrolabe Catalogue

 

Image of the tympan or plate - click for larger version
Tympan 4b
Composite plate for 22° and 40°.

Almucantars

Divisions Labelled Style
Divided every 2° from 0° to 90° Labelled every 2° with   (Abdjad) numerals Plain line.

Azimuths

Divisions Labelled Style
Divided every 10°  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
Meridian line
Horizon rectus
Unequal hours Numbered (Numbers in Numbers, engraved script) (Abdjad), Plain line style.
Equal hours from sunset Numbered (Numbers in Numbers, engraved script) (Abdjad), Dotted line style.

Inscriptions

Transcription Translation Type
العرض كب The latitude 22° Latitude
العرض م The latitude 40° Latitude
المشرق East Direction
المغرب West Direction
لمعرفت الغروب السهيل For knowing the setting of the Canopus Miscellaneous
لمعرفت الطلوع السهيل For knowing the rising of the Canopus Miscellaneous
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