Date |
1789/90 (A.H.
1204) |
Maker |
Sayyid ’Abd
al-Baqi |
Place |
Persia (?) |
Material |
Brass |
Inventory no. |
50059 |
Acquisition |
Presented by J. A. Billmeir in
1957 |
The rete is of the foliate (single knob) type. One
rotation knob on tropic of capricorn at the bottom.
Counter-changed east-west line at the ecliptic.The zodiac on
the rete is labelled: الحمل , الشور , الجوزا , السرطان ,
الاسد , السنبله , الميزان , العقرب , القوس , الجدي , الدلو ,
الحوت
Scales
Range & Units |
Numbered |
Geometry |
Location |
Zodiacal
signs |
N/A Zodiacal divisions, equal or unequal |
Every 6 |
Ecliptic |
ecliptic |
Stars
There are 38 stars on the rete marked with
foliate 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 |
دنب القطس |
Deneb Kaitos |
7.0° of Aries |
-19° |
foliate |
غول |
Algol |
3.0° of Taurus |
39° |
foliate |
قطس ?? |
|
7.0° of Taurus |
1° |
foliate |
صدر القطس |
|
8.0° of Taurus |
-16° |
foliate |
كف الجدما |
Menkar |
9.0° of Taurus |
2° |
foliate |
|
|
24.0° of Taurus |
-14° |
foliate |
دبران |
Aldebaran |
6.0° of Gemini |
15° |
foliate |
عيوق |
Capella |
10.0° of Gemini |
44° |
foliate |
رجل يسرى |
Rigel |
14.0° of Gemini |
-11° |
foliate |
|
|
19.0° of Gemini |
6° |
foliate |
رجل اليمنى |
|
24.0° of Gemini |
-7° |
foliate |
يد اليمنى |
Betelgeuse |
25.0° of Gemini |
5° |
foliate |
شعراى |
Sirius |
6.0° of Cancer |
-16° |
foliate |
شعراى شامي |
Procyon |
20.0° of Cancer |
4° |
foliate |
طرف السفينه |
|
25.0° of Cancer |
-20° |
foliate |
فرد الشجاعه |
Alphard |
18.0° of Leo |
-16° |
foliate |
قاعدة الباطيه |
|
7.0° of Virgo |
-15° |
foliate |
جناح الغرابه |
|
28.0° of Virgo |
-14° |
foliate |
|
|
9.0° of Libra |
56° |
foliate |
سمك اعزل |
Spica |
10.0° of Libra |
-9° |
foliate |
سماك رامح |
Arcturus |
26.0° of Libra |
23° |
foliate |
فكه |
Alphecca |
21.0° of Scorpio |
27° |
foliate |
عنق حيه |
Unukalhai |
22.0° of Scorpio |
6° |
foliate |
راس جاثيه |
Rasalgethi |
17.0° of Sagittarius |
16° |
foliate |
عين ثوريه |
Aldebaran |
18.0° of Sagittarius |
50° |
foliate |
راس حواه |
Rasalhague |
20.0° of Sagittarius |
11° |
foliate |
واقع |
Vega |
10.0° of Capricorn |
39° |
foliate |
منقار دجاجه |
Albireo |
22.0° of Capricorn |
24° |
foliate |
طاير |
Altair |
22.0° of Capricorn |
8° |
foliate |
دنب دلفن |
Deneb Dulfim |
3.0° of Aquarius |
8° |
foliate |
دنب دجاجهن |
Deneb |
12.0° of Aquarius |
49° |
foliate |
ذنب الجدي |
Deneb Algiedi |
21.0° of Aquarius |
-16° |
foliate |
فم فرس |
Enif |
24.0° of Aquarius |
10° |
foliate |
ساق ساكب المء |
Skat |
9.0° of Pisces |
-19° |
foliate |
مكب فرس |
Scheat |
12.0° of Pisces |
24° |
foliate |
|
|
14.0° of Pisces |
29° |
foliate |
بطن |
|
24.0° of Pisces |
24° |
foliate |
Pin & Wedge
The rete is attached using a pin
& wedge. Most likely a replacement.