Date |
1728/9 (A.H. 1141) |
Maker |
Muḥammad ibn Aḥmad
al-Baṭṭuṭī |
Place |
North Africa |
Material |
Brass |
Inventory no. |
52713 |
Acquisition |
Presented by Lewis Evans in
1924 |
The rete is of the maghribi (four knobs) type. The
zodiac on the rete is labelled: الحمل , الثور , الجوزا ,
السرطان , الاسد , السنبله , الميزان , العقرب , القوس , الجدي
, الدلو , الحوت
Scales
Range & Units |
Numbered |
Geometry |
Location |
Ecliptic |
0 - 30 Degrees of ecliptic |
Not numbered |
Ecliptic |
ecliptic |
Stars
There are 25 stars on the rete marked with hook
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 |
بطن قيطوس |
Baten Kaitos |
18.0° of Aries |
-13° |
hook |
راس الغول |
Algol |
18.0° of Taurus |
42° |
hook |
الذبران |
Aldebaran |
8.0° of Gemini |
16° |
hook |
قدم الجوزا |
Rigel |
10.0° of Gemini |
-7° |
hook |
عيوق |
Capella |
14.0° of Gemini |
42° |
hook |
منكب الجوزا |
Betelgeuse |
27.0° of Gemini |
6° |
hook |
العبور |
Sirius |
8.0° of Cancer |
-17° |
hook |
الغميصا |
Procyon |
21.0° of Cancer |
5° |
hook |
يد الدب |
Talitha Borealis |
7.0° of Leo |
48° |
hook |
رجل الدب |
Tania Australis |
24.0° of Leo |
39° |
hook |
الغرب |
Gienah |
15.0° of Virgo |
-13° |
hook |
الاعزل |
Spica |
18.0° of Libra |
-7° |
hook |
الرامح |
Arcturus |
4.0° of Scorpio |
19° |
hook |
عنق الحيه |
Unukalhai |
22.0° of Scorpio |
18° |
hook |
فكه |
Alphecca |
25.0° of Scorpio |
27° |
hook |
قلب العقرب |
Antares |
8.0° of Sagittarius |
-24° |
hook |
راس الحوا |
Rasalhague |
22.0° of Sagittarius |
9° |
hook |
[no name] |
|
28.0° of Sagittarius |
2° |
hook |
واقع |
Vega |
2.0° of Capricorn |
40° |
hook |
الطاير |
Altair |
22.0° of Capricorn |
7° |
hook |
دبن الجدى |
Deneb Algiedi |
4.0° of Aquarius |
-20° |
hook |
الدلفين |
Deneb Dulfim |
7.0° of Aquarius |
24° |
hook |
ردف |
Deneb |
8.0° of Aquarius |
45° |
hook |
دنب قيطوس |
Deneb Kaitos |
6.0° of Pisces |
-13° |
hook |
منكب الفرص |
Scheat |
14.0° of Pisces |
27° |
hook |
Horse Image:
Pin & Wedge
The rete is attached using a pin
& wedge.