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Номер объекта
M-463
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Astronomical
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Наименование
Astrolabe
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Название
Astrolabe: Western, De Rojas-type
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Создатель
Sevin, Pierre
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Описание
Body, mater, regula, bail, and ring. False rete. Labeled in Latin. Mater consists of 2 rings, riveted to central disk with cavity on both sides. Bail pivots and ring swirls. Cavity is blank, shallow with no slot or pin for tympan. Probably held a "ready reckoner". Reverse of astrolabe shows rotatable disk with a de Rojas projection and fixed regula with sliding cursor. De Rojas projection shows 19 stars from 7 in "Ursa Major" to "Aquarii Fomahant". South polar area is engraved as above.
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Материал
"P. Sevin A Paris 1682" at bottom of de Rojas disk on reverse.
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Материал
brass
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Тема
France
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Размерность
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Imperial(in) |
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Metric(cm) |
| Height |
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34.6 |
| Width |
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26.6 |
| Depth |
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0.85 |
| Diameter |
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| Circumference |
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Imperial(in) |
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Metric(cm) |
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| Width |
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