Astrolabe Catalogue

 

Small image of astrolabe rete separated from astrolabe. Click to enlarge.
Date late 16th century
Place Flanders
Material Brass
Inventory no. 45365
Acquisition Purchased from H. E. Backer in 1952
The rete is of the arsenius type. This rete combines design characteristics of both Mercator's retes and Arsenius's retes. .The zodiac on the rete is labelled: ARIES ♈ , TAVRVS ♉ , GEMINI ♊ , CANCER ♋ , LEO ♌ , VIRGO ♍ , LIBRA ♎ , SCROPIVS ♏ , SAGITTARIVS ♐ , CAPRICORNVS ♑ , AQVARIVS ♒ , PISCES ♓

Scales


Type Range & Units Numbered Geometry Location
Ecliptic 0 - 30 Degrees of ecliptic Every 10  Ecliptic ecliptic

Stars

There are 48 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
Cauda Ceti Deneb Kaitos 6.0° of Aries -20° flamant
Casiopee pect9 Schedar 7.0° of Aries 54° flamant
Venter Ceti Baten Kaitos 25.0° of Aries -12° flamant
Nares Ceti Menkar 12.0° of Taurus flamant
Caput Medusæ Algol 13.0° of Taurus 40° flamant
Persei latus dext. Mirfak 18.0° of Taurus 49° flamant
Oculus Tauri Aldebaran 6.0° of Gemini 16° flamant
Hircus Capella 14.0° of Gemini 46° flamant
Orionis sin. pes Rigel 16.0° of Gemini -8° flamant
Orionis dext. hum. Betelgeuse 24.0° of Gemini flamant
Canis maior Sirius 6.0° of Cancer -16° flamant
Caput ♊ antec. Castor 16.0° of Cancer 33° flamant
Canicula Procyon 18.0° of Cancer -6° flamant
Hydræ clara Alphard 15.0° of Leo -7° flamant
Cor Leonis Regulus 25.0° of Leo 23° flamant
Dubhe 7.0° of Virgo 64° flamant
Plaustrum 9.0° of Virgo 59° flamant
Dorsum Leonis Zosma 13.0° of Virgo 23° flamant
Cauda Leonis Denebola 22.0° of Virgo 17° flamant
Ursæ maioris Alkaid 23.0° of Virgo 56° flamant
28.0° of Virgo 58° flamant
Corvi ala dext. Gienah 1.0° of Libra -15° flamant
Ursæ maioris 11.0° of Libra 58° flamant
Spica Virginis Spica 18.0° of Libra -9° flamant
Ursæ maioris 19.0° of Libra 57° flamant
Ursæ maioris 25.0° of Libra 51° flamant
Arcturus Arcturus 2.0° of Scorpio 22° flamant
Bootis sin hum Seginus 7.0° of Scorpio 40° flamant
Lanx ♎ Sept. Zubeneshamali 16.0° of Scorpio -8° flamant
Corona Sept. Alphecca 22.0° of Scorpio 29° flamant
Palma sin. Serpentarij Yed Prior 2.0° of Sagittarius -3° flamant
Caput Herculis Rasalgethi 15.0° of Sagittarius 15° flamant
Caput Serpentarij Rasalhague 21.0° of Sagittarius 13° flamant
Caput Draconis Rastaban 28.0° of Sagittarius 52° flamant
Lyra Vega 6.0° of Capricorn 39° flamant
Aquila Altair 21.0° of Capricorn flamant
Cauda Cygni Deneb 6.0° of Aquarius 44° flamant
Cephei dext. hum. Alderamin 16.0° of Aquarius 61° flamant
Cauda Capricorni Deneb Algiedi 17.0° of Aquarius -18° flamant
Muscida Pegasi Enif 19.0° of Aquarius flamant
Crus Aquarij Skat 7.0° of Pisces -17° flamant
Humerus Pegasi Markab 10.0° of Pisces 13° flamant
Crus Pegasi Scheat 10.0° of Pisces 26° flamant
Vmbilicus Pegasi Alpheratz 27.0° of Pisces 27° flamant
Extremum alæ Pegasi Algenib 28.0° of Pisces 13° flamant

Nut & Bolt

The rete is attached using a nut & bolt. The nut is in the shape of a Maltese Cross. The bolt is integrated into the alidade on the back of the instrument.
MHS Home | Contact Us | ©2006 Museum of the History of Science