Astrolabe Catalogue


Small image of astrolabe rete separated from astrolabe. Click to enlarge.
Date ca. 1710
Maker Khalīl Muḥammad ibn Ḥasan ‘Alī
Place Iṣfahān
Material Brass
Inventory no. 33739
Acquisition Presented by J. A. Billmeir in 1957
The rete is of the foliate (single knob) type. The east/west bar is poorly drawn, the two sides do not match up well. The tropic of capricorn is nicely decorated with star pointers at each end. There are numerous construction marks on the back of the rete.The zodiac on the rete is labelled: حمل , ثور , جوزا , سرطان , اسد , سنبل , ميزان , عقرب , قوس , جدي , دلو , حوت


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


There are 26 stars on the rete marked with bulb 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
NK pointer damaged 0 bulb
NK pointer damaged 0 bulb
ذنب قيطس جنوبى Deneb Kaitos 24.0° of Aries -17° bulb
غول Algol 18.0° of Taurus 38° bulb
عين الثور Aldebaran 6.0° of Gemini 16° bulb
عيوق Capella 15.0° of Gemini 44° bulb
رجل اليسرى Rigel 16.0° of Gemini -7° bulb
يد يمنى Betelgeuse 25.0° of Gemini bulb
شعراى يمانيه Sirius 8.0° of Cancer -16° bulb
شامى Procyon 20.0° of Cancer bulb
فرد الشجاع Alphard 16.0° of Leo -7° bulb
قلب الاسد Regulus 24.0° of Leo 15° bulb
جناح الغرب Gienah 7.0° of Virgo -16° bulb
سماك اعزل Spica 19.0° of Libra -10° bulb
سماك رامح Arcturus 3.0° of Scorpio 21° bulb
نير فكه Alphecca 21.0° of Scorpio 28° bulb
عنق الحيه Unukalhai 24.0° of Scorpio bulb
قلب العقرب Antares 5.0° of Sagittarius -24° bulb
راس الحوا Rasalhague 20.0° of Sagittarius 12° bulb
نسر واقع Vega 9.0° of Capricorn 39° bulb
نسر طاير Altair 25.0° of Capricorn bulb
ذنب الدجاجه Deneb 7.0° of Aquarius 42° bulb
فم الفرس Enif 19.0° of Aquarius bulb
ساق ايمن ساكب Skat 9.0° of Pisces -17° bulb
كف الخضيب Caph 26.0° of Pisces 47° bulb

Horse Image:

astrolabe part (photo)

Pin & Wedge

The rete is attached using a pin & wedge.
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