The back contains 3 scales of the following types:
Type
(click to view scale details) |
Range & Units |
Numbered |
Geometry |
Location |
| Calendar |
First day of month - Last day of month, Days of
year |
Every 10 days |
Circular, concentric |
The entire outer circle on the back of an
astrolabe. |
| Zodiacal
signs |
0 - 30, Zodiacal divisions, equal or unequal |
Every 10 |
Circular, concentric |
Circular scale immediately inside the outer scale -
refers to the full circle |
| Degree |
0 - 90, Degrees |
Every 10 degrees |
Circular, concentric |
Circular scale second in from the outer scale -
refers to the full circle. |
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-right/bottom-left |
The eclipitic is labelled with the zodiacal
symbols |
|
|
Plain |
|
The universal contains the following meridians:
| Interval |
Style of line |
Number style |
Description |
| 1° |
Plain |
N/A |
Above 70°, the meridians are separated by 2°; above
the interval becomes 5°. Every hour line, i.e., every
15°, is numbered along both tropic lines |
The universal contains the following parallels:
| Range |
Interval |
Style of line |
Number style |
Description |
| |
1° |
Plain |
N/A |
|
The universal contains scales of the following types:
| Type |
Range & Units |
Numbered |
Geometry |
Location |
| Zodiacal
signs |
0 - 30, Zodiacal divisions, equal or unequal |
Every 10 |
Linear |
On the ecliptic of a universal projection |
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 |
| None |
|
N/A |
N/A |
|
| Eridani extrema |
|
15.0° of Taurus |
-40° |
engraved |
| Oculus ♉ |
Aldebaran |
4.0° of Gemini |
15° |
engraved |
| Hircus |
Capella |
12.0° of Gemini |
45° |
engraved |
| Orionis sinister pes |
Rigel |
14.0° of Gemini |
-9° |
engraved |
| Orio: dex: hume |
Betelgeuse |
23.0° of Gemini |
6° |
engraved |
| Canopus |
Canopus |
26.0° of Gemini |
-51° |
engraved |
| Canis Maior |
Sirius |
7.0° of Cancer |
-16° |
engraved |
| Canicula |
Procyon |
19.0° of Cancer |
7° |
engraved |
| Vrsa maior |
|
8.0° of Virgo |
58° |
engraved |
| Vrsa maior |
|
16.0° of Virgo |
64° |
engraved |
| Vrsa maior |
|
21.0° of Virgo |
56° |
engraved |
| Cor ♌ |
Regulus |
24.0° of Virgo |
15° |
engraved |
| Vrsa maior |
|
28.0° of Virgo |
64° |
engraved |
| Vrsa maior |
|
7.0° of Libra |
59° |
engraved |
| Vrsa maior |
|
15.0° of Libra |
58° |
engraved |
| Spica ♍ |
Spica |
15.0° of Libra |
-9° |
engraved |
| Vrsa maior |
|
21.0° of Libra |
51° |
engraved |
| Arcturus |
Arcturus |
29.0° of Libra |
21° |
engraved |
| Cauda ♏ |
Shaula |
16.0° of Sagittarius |
-36° |
engraved |
| Lÿra |
Vega |
6.0° of Capricorn |
39° |
engraved |
| Aquila |
Altair |
21.0° of Capricorn |
7° |
engraved |
| Cauda cÿgni |
Deneb |
7.0° of Aquarius |
44° |
engraved |
| Postre: aque fuse |
|
12.0° of Aquarius |
-35° |
engraved |
