Astrolabe Catalogue

 

Image of the tympan or plate - click for larger version
Tympan 2a
Latitude 29°0'
The latitude of this plate is determined by inspection, as the engraving is difficult to read and appears to be 28°.

Almucantars

Divisions Labelled Style
Divided every 1° from 0° to 90° Labelled every 1° with   (Abdjad) numerals Plain line.

Azimuths

Divisions Labelled Style
Divided every 5°  Labelled every 5° 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.

Inscriptions

Transcription Translation Type
لعرض كح For latitude 28° Latitude
ساعاته يج مز Hours 13h 57m Hours of daylight
المشرق East Direction
المغرب West Direction
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