Astrolabe Catalogue


Small image of astrolabe rete separated from astrolabe. Click to enlarge.
Date 1687/8 (A.H. 1099)
Maker ‘Abdullah ibn Sāsī
Place Morocco
Material Brass
Inventory no. 45220
Acquisition Presented by Lewis Evans in 1924
The rete is of the maghribi (two knobs) type. The two knobs are now missing.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 Not numbered  Ecliptic ecliptic


There are 25 stars on the rete marked with dagger 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
بطن قيطوس Baten Kaitos 25.0° of Aries -11° dagger
غول Algol 15.0° of Taurus 40° dagger
الدبران Aldebaran 6.0° of Gemini 14° dagger
منكب Betelgeuse 12.0° of Gemini dagger
قدم الجوزا Rigel 15.0° of Gemini -7° dagger
عيوق Capella 16.0° of Gemini 45° dagger
عبور Sirius 6.0° of Cancer -13° dagger
عميصا Procyon 17.0° of Cancer dagger
دبن Talitha Borealis 12.0° of Leo 46° dagger
رجل Tania Australis 21.0° of Leo 42° dagger
قلب الاسد Regulus 25.0° of Leo 12° dagger
جناح الغرب Gienah 12.0° of Virgo -14° dagger
الاعزل Spica 20.0° of Libra -8° dagger
الرامح Arcturus 2.0° of Scorpio 21° dagger
فكى Alphecca 23.0° of Scorpio 30° dagger
الحياه Unukalhai 23.0° of Scorpio 16° dagger
قلب الغرب Antares 9.0° of Sagittarius -22° dagger
الحوا Rasalhague 20.0° of Sagittarius 12° dagger
واقع Vega 2.0° of Capricorn 38° dagger
الطاير Altair 21.0° of Capricorn dagger
دبن الجدى Deneb Algiedi 25.0° of Capricorn -20° dagger
دلفم Deneb Dulfim 2.0° of Aquarius 13° dagger
ردف Deneb 5.0° of Aquarius 46° dagger
منكب Scheat 10.0° of Pisces 27° dagger
دنب قيطوس Deneb Kaitos 0.0° of Pisces -8° dagger

Horse Image:

astrolabe part (photo)

Pin & Wedge

The rete is attached using a pin & wedge.
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