Date |
1559 |
Maker |
Thomas Gemini |
Place |
London |
Material |
Brass |
Inventory no. |
42223 |
Acquisition |
Transferred from the
University Observatory, Oxford, in 1936 |
The rete is of the arsenius type. This rete has true
three-dimensionality in the strapwork (more usually retes of
this school merely give the impression of interlacing by
means of engraved shading).The zodiac on the rete is
labelled: Aries , Taurus , Gemini , [only the symbol is
present] , Leo , Virgo , Libra , Scorpius , Sagittarius ,
Capricornus , Aquarius , Pisces
Scales
Range & Units |
Numbered |
Geometry |
Location |
Ecliptic |
0 - 30 Degrees of ecliptic |
Every 5 |
Ecliptic |
ecliptic |
Stars
There are 28 stars on the rete marked with
starsrc=+ipped 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 |
Pectus Casiop |
|
9.0° of Aries |
54° |
starsrc=+ipped |
Triangulus |
|
25.0° of Aries |
26° |
starsrc=+ipped |
Caput Gorgonis |
|
12.0° of Taurus |
39° |
starsrc=+ipped |
Pleiades |
|
22.0° of Taurus |
23° |
starsrc=+ipped |
Oculus [taurus] |
|
4.0° of Gemini |
16° |
starsrc=+ipped |
Cingulum Ori |
|
18.0° of Gemini |
-2° |
starsrc=+ipped |
Venter Leporis |
|
18.0° of Gemini |
-22° |
starsrc=+ipped |
Canis maior |
|
9.0° of Cancer |
-16° |
starsrc=+ipped |
Canis minor |
|
17.0° of Cancer |
8° |
starsrc=+ipped |
Pollux |
|
19.0° of Cancer |
28° |
starsrc=+ipped |
Pectus [cancer] |
|
1.0° of Leo |
23° |
starsrc=+ipped |
Lucida Hydrae |
|
14.0° of Leo |
-5° |
starsrc=+ipped |
Cor [leo] |
|
23.0° of Leo |
14° |
starsrc=+ipped |
Dorsum Vrs. ma. |
|
5.0° of Virgo |
63° |
starsrc=+ipped |
Dorsum [leo] |
|
10.0° of Virgo |
23° |
starsrc=+ipped |
Cauda [leo] |
|
21.0° of Virgo |
16° |
starsrc=+ipped |
Algorab |
|
29.0° of Virgo |
-13° |
starsrc=+ipped |
Cauda Vr. ma. |
|
8.0° of Libra |
58° |
starsrc=+ipped |
Pes posterior Vr ma |
|
13.0° of Libra |
52° |
starsrc=+ipped |
Aspeta Coro |
|
21.0° of Libra |
28° |
starsrc=+ipped |
Alramech |
|
0.0° of Scorpio |
19° |
starsrc=+ipped |
Lynx Sep |
|
15.0° of Scorpio |
-7° |
starsrc=+ipped |
Hasta Bootis |
|
18.0° of Scorpio |
42° |
starsrc=+ipped |
Cor [scorpio] |
|
2.0° of Sagittarius |
-23° |
starsrc=+ipped |
Caput draconis |
|
26.0° of Sagittarius |
52° |
starsrc=+ipped |
Scheat |
Skat |
5.0° of Pisces |
-20° |
starsrc=+ipped |
Venter Caeti |
|
24.0° of Pisces |
-12° |
starsrc=+ipped |
Caput And |
|
25.0° of Pisces |
29° |
starsrc=+ipped |
Nut & Bolt
The rete is attached using a nut &
bolt. Brass screw with washer thread into the arm on the
back.