Astrolabe Catalogue


Small image of astrolabe rete separated from astrolabe. Click to enlarge.
Date ca. 1700
Maker Khalīl Muḥammad ibn Ḥasan ‘Alī
Place Iṣfahān
Material Brass
Inventory no. 35313
Acquisition Presented by J. A. Billmeir in 1957
The rete is of the other (crude) type. The rete is a replacementThis rete is a replacement. It does not reflect the more refined skill of the mater. None of the star pointers bear names.The zodiac on the rete is labelled: الحمل , الثور , الجوزا , السرطان , الاسد , السنبله , الميزان , العقرب , القوس , الجدي , الدلو , الحوت


There are 19 stars on the rete marked with flamant 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
Deneb Kaitos Shemali 16.0° of Aries -8° flamant
5.0° of Gemini -10° flamant
Capella 11.0° of Gemini 49° flamant
Betelgeuse 25.0° of Gemini flamant
15.0° of Cancer -8° flamant
24.0° of Cancer -9° flamant
Talitha Borealis 4.0° of Leo 45° flamant
23.0° of Leo -6° flamant
27.0° of Leo -7° flamant
11.0° of Virgo -6° flamant
26.0° of Virgo -7° flamant
Spica 18.0° of Libra -9° flamant
9.0° of Scorpio 12° flamant
Alphecca 22.0° of Scorpio 24° flamant
16.0° of Sagittarius 13° flamant
Vega 3.0° of Capricorn 31° flamant
16.0° of Capricorn flamant
0.0° of Aquarius flamant
11.0° of Pisces -8° flamant

Horse Image:

astrolabe part (photo)

Pin & Horse

The rete is attached using a pin & horse. The head of the pin is decorated with radial lines. The horse is unusual in that there is the head of a duck immediately behind the horse's head. There is a flower-shaped spacer between the horse and the rete. Like the alidade on the back, this is a later replacement..
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