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Newtonian secondary mirror
An elliptical plane mirror made as a secondary mirror for a Newtonian reflector telescope. The diameter of the minor axis of this mirror is 19.05mm.
William Herschel, with help from his brother Alexander and his sister Caroline made a number of these mirrors to go in the telescopes they made to use and to sell.
William Herschel, with help from his brother Alexander and his sister Caroline made a number of these mirrors to go in the telescopes they made to use and to sell.
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Object Details
| ID: | AST0826 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Newtonian secondary mirror |
| Display location: | Not on display |
| Creator: | Herschel, Caroline Lucretia; Herschel, William Johann Alexander Herschel |
| Date made: | circa 1800 |
| Credit: | National Maritime Museum, Greenwich, London, Herschel Collection |
| Measurements: | Diameter: 19 in; Overall: 20 mm |