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Equatorial sector
This brass equatorial sector, made by Gosselin, is made up of two sections slotted together.
Two telescopes are attached to the sector, one on one side and a second on the reverse. When closed the instrument has two long sides (seventeen inches long) joined by an arc (approximately fourteen inches long). The arc has a scale of degrees on it of eight degrees to forty-five degrees on one section and forty-five to ninety degrees on the other section.
When in use the two sections of the instrument slide open to make a quadrant. It would probably have been used to find the position of comets with respect to nearby stars whose positions were known. The divisions on this instrument were done by Pierre Sevin.
The middle part of the instrument is decorated with scrolled acanthus leaf work in brass.
Two telescopes are attached to the sector, one on one side and a second on the reverse. When closed the instrument has two long sides (seventeen inches long) joined by an arc (approximately fourteen inches long). The arc has a scale of degrees on it of eight degrees to forty-five degrees on one section and forty-five to ninety degrees on the other section.
When in use the two sections of the instrument slide open to make a quadrant. It would probably have been used to find the position of comets with respect to nearby stars whose positions were known. The divisions on this instrument were done by Pierre Sevin.
The middle part of the instrument is decorated with scrolled acanthus leaf work in brass.
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Object Details
| ID: | AST0966 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Telescope |
| Display location: | Not on display |
| Creator: | Gosselin; Sevin, Pierre |
| Date made: | 1665-1680; 1665-80 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 432 mm |
| Parts: | Equatorial sector |