Astrolabe Catalogue


Small image of complete astrolabe as rete cannot be removed from mater. Click to enlarge.
Date ca. 1350
Place Oxford
Material Brass
Inventory no. 47901
Acquisition Lent by Oriel College, Oxford, in 1924
The rete is of the y-shaped (straight) type. The Tropic of Capricorn band has broken off near the top of the instrument.The zodiac on the rete is labelled: Aries , Tau , Gei , Can , Leo , Vir , Libra , SScor9 , SSag9 , Cap' , Aquar9 , Pisc'


Type Range & Units Numbered Geometry Location
Calendar First day of month - Last day of month Days of year Every 5  Circular, concentric tropic of capricorn


There are 17 stars on the rete marked with flamant 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
alhab' Sirius pointer damaged pointer damaged flamant
libed pointer damaged pointer damaged flamant
cor Antares pointer damaged pointer damaged flamant
corv9 Gienah pointer damaged pointer damaged flamant
ala 5.0° of Aries 23° flamant
batonk Baten Kaitos 20.0° of Aries -15° flamant
aliok Capella 14.0° of Gemini 44° flamant
elgueza Betelgeuse 16.0° of Gemini flamant
algom Procyon 18.0° of Cancer flamant
egr' 22.0° of Cancer 44° flamant
cau le Regulus 16.0° of Virgo 18° flamant
alramc Arcturus 27.0° of Libra 22° flamant
yed Yed Prior 27.0° of Scorpio flamant
Wega Vega 6.0° of Capricorn 37° flamant
alth' Altair 17.0° of Capricorn flamant
delfin Deneb Dulfim 10.0° of Aquarius flamant
hu9 equi Scheat 11.0° of Pisces 22° flamant


The rete is attached using a rivet.
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