Astrolabe Catalogue

 

Image of the tympan or plate - click for larger version
Tympan 5b
Composite plate for 18° and 44°.

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 يح Latitude 18° Latitude
العرض مد Latitude 44° Latitude
المشرق East Direction
المغرب West Direction
لمعرفت غروب السهيل For knowing the setting of the Canopus Miscellaneous
ساعاته يج Hours 13h Hours of daylight
ساعاته يه Hours 15h Hours of daylight
لمعرفت الطلوع السهيل For knowing the rising of the Canopus Miscellaneous
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