Astrolabe Catalogue

 

Small image of astrolabe back with rules or alidades removed. Click to enlarge.
Date 13th century
Place North Africa
Material Brass
Inventory no. 41122
Acquisition Bequeathed by T. G. Barnett in 1935

Back


The back of this astrolabe bears an az-Zarqellu projection.

Universal

The back contains a universal with a Azarquiel/Saphea/Gemma Frisius projection. The universal contains the following:
Angle of inclination Direction of inclination Labelled Language Script Line style Notes
Ecliptic 23 Top-left/bottom-right Bears the names of the zodiac Arabic Kufic Plain
The universal contains the following meridians:
Interval Style of line Number style Description
Plain Arabic Abdjad, maghrib
The universal contains the following parallels:
Range Interval Style of line Number style Description
  Plain Arabic Abdjad, maghrib Note that the 60° label in the upper right quadrant has been incorrectly written 90°

The universal contains scales of the following types:
Type Range & Units Numbered Geometry Location
Zodiacal signs Aries - Pisces, Degrees of ecliptic Not numbered degrees Linear On the ecliptic of a universal projection
Degree 0 - 90, Degrees Every 5 degrees Circular, concentric The entire outer circle on the back of an astrolabe.

Stars

The universal contains the following stars. 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
فم الحوت Fomalhaut N/A N/A engraved
طاير Altair N/A N/A engraved
غميصا Procyon N/A N/A engraved
؟؟؟؟ N/A N/A engraved
قايد Alkaid N/A N/A engraved
فكه Alphecca N/A N/A engraved
سهيل Canopus N/A N/A engraved
نعايم N/A N/A engraved
عيوق Capella N/A N/A engraved
نير قيطوس N/A N/A engraved
رامح Arcturus N/A N/A engraved
ردف Deneb N/A N/A engraved
منكب Betelgeuse N/A N/A engraved
[not labeled] N/A N/A engraved
اعزل Spica N/A N/A engraved
ذنب Deneb Algiedi N/A N/A engraved
حوا Rasalhague N/A N/A engraved
قدم Rigel N/A N/A engraved
غول Algol N/A N/A engraved
فرقد Phad N/A N/A engraved
قلب Antares N/A N/A engraved
عبور Sirius N/A N/A engraved
واقع Vega N/A N/A engraved
دبران Aldebaran N/A N/A engraved
خضيب Caph N/A N/A engraved
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