Astrolabe Catalogue

 

Date 1559
Maker Thomas Gemini
Place London
Material Brass
Inventory no. 42223
Acquisition Transferred from the University Observatory, Oxford, in 1936

Rule, Regula, Pointer and Alidade Images

Alidade Image:

astrolabe part (photo)

Rule Image:

astrolabe part (photo)

Alidade

Appearance Tip Sights Pinholes Notches Description
Double-ended,  counter-changed,  original.  Notched Rigid Double None

Scales


Type Range & Units Numbered Geometry Location
Declination 0 - 72 Degrees Every 10 degrees Linear Rule, right arm

Alidade

Appearance Tip Sights Pinholes Notches Description
Single-ended,  original.  Flat None None None Rule for use with the universal planisphere. Slotted for a cursor and bracchiolus, which are missing.
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