Astrolabe Catalogue

 

Image of the tympan or plate - click for larger version
Tympan 3b
This side of the plate contains various scales that are commonly found on the back of European astrolabes. That the equator and tropic of capricorn are present, as are the three directions, suggest that this plate was initially intended to be a stereographic projection like the others.

Circles

Type Labelled Style Notes
Equator Æqŭator (Latin in Italic script) Plain line. This circle is labeled twice
Tropic of Capricorn Tropicŭs ♑ (Latin in Italic script) Plain line. This circle is labeled twice

Lines

Type Labelled Description
Meridian line
Horizon rectus Horiszō rectŭs (Latin in Italic script)

Inscriptions

Transcription Translation Type
Septentrio North Direction
Occidens West Direction
Oriens East Direction

Scales


Type Range & Units Numbered Geometry Location
Table of Horizons 0 - 90 Degrees of latitude Every 10 degrees n/a n/a
Shadow square 0 - 12 Fingers Every 1 fingers Box n/a
Shadow square 0 - 12 Fingers Every 1 fingers Box n/a
Equal hours 0 - 12 Times of day Every 1 hours n/a n/a
Unequal hours 0 - 12 1/12 of daylight Every 1 hours n/a n/a
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