Astrolabe Catalogue


Small image of astrolabe rete separated from astrolabe. Click to enlarge.
Date ca. 1400
Place Europe
Material Brass
Inventory no. 52869
Acquisition Presented by J. A. Billmeir in 1957
The rete is of the indicator-line (full) type. Two of the star pointers were at some point replaced. The most unusual feature of this rete is the toothed Tropic of Capricorn.The zodiac on the rete is labelled: ARIES , TAUR9 , GEMINI , CANCER , LEO , VIRGO , LIBRA , SCORPI9 , SAGITARI9 , CAPRICORN9 , AQUARI9 , PISCIS


Type Range & Units Numbered Geometry Location
Ecliptic 0 - 30 Degrees of ecliptic Not numbered  Ecliptic ecliptic
Calendar N/A Days of year Not numbered  Circular, concentric tropic of capricorn


There are 23 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
ANDRO Mirach 10.0° of Aries 34° flamant
VENTERCAYTOS Baten Kaitos 20.0° of Aries -14° flamant
ALGOL Algol 3.0° of Taurus 40° flamant
ALDEBARAN Aldebaran 2.0° of Gemini 15° flamant
ALAYOC Capella 9.0° of Gemini 44° flamant
RIGIL Rigel 14.0° of Gemini -9° flamant
ALGEUSA Betelgeuse 22.0° of Gemini flamant
ALABOR Sirius 6.0° of Cancer -17° flamant
ALGOMECA Procyon 17.0° of Cancer flamant
ALFRT Alphard 15.0° of Leo -5° flamant
COR LEONIS Regulus 22.0° of Leo 15° flamant
CAUDALE Denebola 19.0° of Virgo 17° flamant
SPICHA Spica 11.0° of Libra -7° flamant
CAUDAUSE 19.0° of Libra 58° flamant
ALRAMEC Arcturus 29.0° of Libra 25° flamant
CORONA Alphecca 18.0° of Scorpio 28° flamant
SERPENTARI9 Rasalhague 17.0° of Sagittarius 14° flamant
VEGA Vega 2.0° of Capricorn 43° flamant
TAYR Altair 19.0° of Capricorn flamant
GAULINE Deneb 2.0° of Aquarius 45° flamant
hUMER9 EQUI Scheat 6.0° of Pisces 25° flamant
CAUDACAYT Deneb Kaitos 26.0° of Pisces -13° flamant
ALF EQVI Algenib 28.0° of Pisces 12° flamant

Nut & Bolt

The rete is attached using a nut & bolt. The threaded pin and nut are probably later replacements.
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