Astrolabe Catalogue


Small image of astrolabe rete separated from astrolabe. Click to enlarge. Small image of astrolabe rete separated from astrolabe. Click to enlarge.
Date 1221/2
Maker Muḥammad ibn Fattūḥ al-Khamā’irī
Place Seville
Material Brass
Inventory no. 44141
Acquisition Presented by Lewis Evans in 1924
The rete is of the indicator-line (simple) type. The star pointers extend from trefoil- or bulb-shaped bases .The zodiac on the rete is labelled: الحمل , الثور , الجوزا , السرطان , الاسد , السنبله , الميزان , العقرب , القوس , الجدي , الدلو , الحوت


Type Range & Units Numbered Geometry Location
Ecliptic 0 - 30 Degrees of ecliptic Every 3  Ecliptic ecliptic


There are 29 stars on the rete marked with hook pointers. Unless otherwise indicated the star name, mediation and declination are as marked/measured on the rete.
Click on the star name or modern star name to search for other astrolabes with the same star.
Star name
(on instrument)
Modern star
(if known)
Mediation Declination Pointer
قلب العقرب Antares pointer damaged pointer damaged hook
الطاير Altair pointer damaged pointer damaged hook
كعب الفرس τ Pegasi pointer damaged pointer damaged hook
عنق الحياة Unukalhai pointer damaged pointer damaged hook
راس الحوا Rasalhague pointer damaged pointer damaged hook
بتن قيطوس Baten Kaitos 20.0° of Aries -15° hook
راس الغول Algol 7.0° of Taurus 41° hook
الدبران Aldebaran 5.0° of Gemini 12° hook
قدم الجوزا Rigel 13.0° of Gemini -11° hook
العيوق Capella 16.0° of Gemini 50° hook
منكب الجوزا Betelgeuse 19.0° of Gemini 50° hook
العبور Sirius 3.0° of Cancer -16° hook
الغميصا Procyon 14.0° of Cancer hook
يد الدب Talitha Borealis 28.0° of Cancer 50° hook
ذنب الشجاع 0.0° of Leo hook
عنق الشجاع Alphard 16.0° of Leo -4° hook
قلب الاسد Regulus 21.0° of Leo 18° hook
رجل الدب Tania Australis 24.0° of Leo 44° hook
جناح الغراب Gienah 24.0° of Virgo -14° hook
السماك الاعزل Spica 17.0° of Libra -9° hook
القايد Alkaid 20.0° of Libra 53° hook
السماك رامح Arcturus 27.0° of Libra 18° hook
الفكة Alphecca 29.0° of Scorpio 35° hook
الواقع Vega 5.0° of Capricorn 44° hook
الردف Deneb 5.0° of Aquarius 46° hook
ذنب الجدي Deneb Algiedi 13.0° of Aquarius -19° hook
منكب الفرس Scheat 9.0° of Pisces 27° hook
الخضيب Caph 20.0° of Pisces 56° hook
ظنب قيطوس Deneb Kaitos 27.0° of Pisces -15° hook

Pin Image:

astrolabe part (photo)

Nut & Bolt

The rete is attached using a nut & bolt.
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