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
Scales
Range & Units |
Numbered |
Geometry |
Location |
Ecliptic |
0 - 30 Degrees of ecliptic |
Every 3 |
Ecliptic |
ecliptic |
Stars
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 |
6° |
bulb |
شعراى يمانيه |
Sirius |
8.0° of Cancer |
-16° |
bulb |
شامى |
Procyon |
20.0° of Cancer |
6° |
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 |
5° |
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 |
6° |
bulb |
ذنب الدجاجه |
Deneb |
7.0° of Aquarius |
42° |
bulb |
فم الفرس |
Enif |
19.0° of Aquarius |
8° |
bulb |
ساق ايمن ساكب |
Skat |
9.0° of Pisces |
-17° |
bulb |
كف الخضيب |
Caph |
26.0° of Pisces |
47° |
bulb |
Horse Image:
Pin & Wedge
The rete is attached using a pin
& wedge.