18.5-inch Dearborn refractor objective
E1444441
UNEXPLORED
The 18.5-inch Dearborn refractor objective is a historically significant large-aperture telescope lens crafted by renowned 19th-century American optician Alvan Clark for the Dearborn Observatory.
All labels observed (2)
| Label | Occurrences |
|---|---|
| 18.5-inch Dearborn refractor | 1 |
| 18.5-inch Dearborn refractor objective canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T20662867 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: 18.5-inch Dearborn refractor objective Context triple: [Alvan Clark, notableWork, 18.5-inch Dearborn refractor objective]
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A.
11-inch Clark refractor
The 11-inch Clark refractor is a historic, high-quality refracting telescope built by Alvan Clark & Sons, notable for its role in pioneering astrophotographic and spectroscopic observations in the late 19th century.
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B.
Lick 36-inch refracting telescope
The Lick 36-inch refracting telescope is a historic large-aperture refractor renowned for its pioneering late-19th-century astronomical observations and status as one of the world’s largest refracting telescopes.
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C.
Rutherfurd photographic telescope
The Rutherfurd photographic telescope is a pioneering 19th-century astronomical instrument built for high-precision celestial photography and spectroscopic studies.
-
D.
Palomar 18-inch Schmidt Telescope
The Palomar 18-inch Schmidt Telescope is a small wide-field survey instrument at Palomar Observatory historically used for photographic sky surveys and the discovery of comets and asteroids.
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E.
Dall–Kirkham telescope
The Dall–Kirkham telescope is a reflecting telescope design that uses an elliptical primary mirror and spherical secondary mirror to provide good on-axis performance with relatively simple, economical optics.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: 18.5-inch Dearborn refractor objective Target entity description: The 18.5-inch Dearborn refractor objective is a historically significant large-aperture telescope lens crafted by renowned 19th-century American optician Alvan Clark for the Dearborn Observatory.
-
A.
11-inch Clark refractor
The 11-inch Clark refractor is a historic, high-quality refracting telescope built by Alvan Clark & Sons, notable for its role in pioneering astrophotographic and spectroscopic observations in the late 19th century.
-
B.
Lick 36-inch refracting telescope
The Lick 36-inch refracting telescope is a historic large-aperture refractor renowned for its pioneering late-19th-century astronomical observations and status as one of the world’s largest refracting telescopes.
-
C.
Rutherfurd photographic telescope
The Rutherfurd photographic telescope is a pioneering 19th-century astronomical instrument built for high-precision celestial photography and spectroscopic studies.
-
D.
Palomar 18-inch Schmidt Telescope
The Palomar 18-inch Schmidt Telescope is a small wide-field survey instrument at Palomar Observatory historically used for photographic sky surveys and the discovery of comets and asteroids.
-
E.
Dall–Kirkham telescope
The Dall–Kirkham telescope is a reflecting telescope design that uses an elliptical primary mirror and spherical secondary mirror to provide good on-axis performance with relatively simple, economical optics.
- F. None of above. chosen
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: 18.5-inch Dearborn refractor objective