Astrolabe Catalogue

 

Small image of astrolabe rete separated from astrolabe. Click to enlarge.
Date 1708/9
Maker Khalīl Muḥammad ibn Ḥasan ‘Alī
Place Iṣfahān
Material Brass
Inventory no. 46680
Acquisition Presented by J. A. Billmeir in 1957
The rete is of the foliate (single knob) type. There are numerous construction marks on the back of the rete, including ecliptic divisions..The zodiac on the rete is labelled: حمل , ثور , جوزا , سرطان , اسد , سنبله , ميزان , عقرب , قوس , جدي , دلو , حوت

Stars

There are 22 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
ذنب قيطس جنوبى Deneb Kaitos 6.0° of Aries -20° bulb
غول Algol 18.0° of Taurus 39° bulb
عين الثور Aldebaran 6.0° of Gemini 16° bulb
رجل اليسرى Rigel 12.0° of Gemini -8° bulb
عيوق Capella 18.0° of Gemini 44° bulb
يد يمنى Betelgeuse 27.0° of Gemini bulb
شعراى يمانيه Sirius 3.0° of Cancer -14° bulb
شامى Procyon 20.0° of Cancer 10° bulb
فرد الشجع Alphard 15.0° of Leo -6° bulb
قاعدة الباطيه Alkes 9.0° of Virgo -14° bulb
جنح الغراب Gienah 29.0° of Virgo -15° bulb
سماك اعزل Spica 20.0° of Libra -10° bulb
سماك رامح Arcturus 3.0° of Scorpio 19° bulb
فكى Alphecca 24.0° of Scorpio 27° bulb
عنق الحيه Unukalhai 26.0° of Scorpio bulb
قلب العقرب Antares 4.0° of Sagittarius -26° bulb
راس الحوا Rasalhague 21.0° of Sagittarius 10° bulb
نسر واقع Vega 8.0° of Capricorn 35° bulb
نسر طاير Altair 23.0° of Capricorn bulb
ذنب الدجاجه Deneb 9.0° of Aquarius 38° bulb
فم الفرس Enif 21.0° of Aquarius bulb
ساق ايمن Skat 6.0° of Pisces -17° bulb

Horse Image:

astrolabe part (photo)

Horse Image:

astrolabe part (photo)

Pin & Horse

The rete is attached using a pin & horse. A simple, thick pin and an ornate horse hold the rete and tympans together..
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