The back contains 1 scales of the following types:
Type
(click to view scale details) |
Range & Units |
Numbered |
Geometry |
Location |
Degree |
Degrees |
Every 10 degrees |
Circular, concentric |
None |
Universal
The back contains a universal with a De
Rojas projection. ‘Horae ante Merid’ numbered 1 to 12 along
upper edge of projection. ‘Horae post Merid’ numbered 1 to 12
along lower edge . The universal contains the following:
|
Angle of inclination |
Direction of inclination |
Labelled |
Language |
Script |
Line style |
Notes |
Tropic of Cancer |
N/A |
N/A |
|
Latin |
Mixed |
None |
|
Tropic of Capricorn |
N/A |
N/A |
|
Latin |
Mixed |
None |
|
Ecliptic |
N/A |
Top-right/bottom-left |
|
Latin |
|
Plain |
|
The universal contains the following meridians:
Interval |
Style of line |
Number style |
Description |
10° |
Plain |
European Modern |
every third line, i.e. the hour lines, are
criss-crossed with arrow marks |
The universal contains the following parallels:
Range |
Interval |
Style of line |
Number style |
Description |
|
5° |
Plain |
N/A |
|
|
30° |
Hatched |
N/A |
|
The universal contains scales of the following types:
Type |
Range & Units |
Numbered |
Geometry |
Location |
Zodiacal
signs |
Degrees of ecliptic |
degrees |
Linear |
The scales found along the central meridian on
universals, usually a zodiac |
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 |
Oculus ♉ |
Aldebaran |
N/A |
N/A |
engraved |
Caude ♌ |
Denebola |
N/A |
N/A |
engraved |
Spica ♍ |
Spica |
N/A |
N/A |
engraved |
Cor ♌ |
Regulus |
N/A |
N/A |
engraved |