BTA-6 telescope
E564119
The BTA-6 telescope is a 6-meter optical reflecting telescope in Russia that became the world’s largest single-aperture optical telescope after the Hale Telescope.
All labels observed (1)
| Label | Occurrences |
|---|---|
| BTA-6 telescope canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6054950 — 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: BTA-6 telescope Context triple: [Hale Telescope, replacedAsLargestBy, BTA-6 telescope]
-
A.
Maksutov telescope
A Maksutov telescope is a compact catadioptric reflecting telescope that uses a meniscus corrector lens to deliver sharp, well-corrected images with relatively simple alignment and maintenance.
-
B.
20 Meter Telescope
The 20 Meter Telescope is a mid-sized radio telescope at the Green Bank Observatory used for astronomical research and education in radio astronomy.
-
C.
Warsaw Telescope
The Warsaw Telescope is a 1.3-meter optical telescope at Las Campanas Observatory in Chile, widely used for large-scale astronomical surveys such as the OGLE project.
-
D.
100-inch Hooker telescope
The 100-inch Hooker telescope is a historic reflecting telescope at Mount Wilson Observatory, famous for Edwin Hubble’s observations that revealed the expanding universe and established galaxies beyond the Milky Way.
-
E.
Curtis Schmidt Telescope
The Curtis Schmidt Telescope is a wide-field Schmidt telescope known for its photographic sky surveys and operation at the Cerro Tololo Inter-American Observatory in Chile.
- 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: BTA-6 telescope Target entity description: The BTA-6 telescope is a 6-meter optical reflecting telescope in Russia that became the world’s largest single-aperture optical telescope after the Hale Telescope.
-
A.
Maksutov telescope
A Maksutov telescope is a compact catadioptric reflecting telescope that uses a meniscus corrector lens to deliver sharp, well-corrected images with relatively simple alignment and maintenance.
-
B.
20 Meter Telescope
The 20 Meter Telescope is a mid-sized radio telescope at the Green Bank Observatory used for astronomical research and education in radio astronomy.
-
C.
Warsaw Telescope
The Warsaw Telescope is a 1.3-meter optical telescope at Las Campanas Observatory in Chile, widely used for large-scale astronomical surveys such as the OGLE project.
-
D.
100-inch Hooker telescope
The 100-inch Hooker telescope is a historic reflecting telescope at Mount Wilson Observatory, famous for Edwin Hubble’s observations that revealed the expanding universe and established galaxies beyond the Milky Way.
-
E.
Curtis Schmidt Telescope
The Curtis Schmidt Telescope is a wide-field Schmidt telescope known for its photographic sky surveys and operation at the Cerro Tololo Inter-American Observatory in Chile.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical observatory instrument
ⓘ
optical reflecting telescope ⓘ |
| altitude | approximately 2070 meters above sea level ⓘ |
| constructionStartDate | 1960 ⓘ |
| country | Russia ⓘ |
| diameterComparison | larger aperture than Hale Telescope ⓘ |
| domeType | rotating dome ⓘ |
| firstLightDate | 1975 ⓘ |
| hasAbbreviation | BTA-6 ⓘ |
| hasAlternativeName | Bolshoi Teleskop Azimutalnyi ⓘ |
| hasApertureDiameter |
6 meters
ⓘ
600 centimeters ⓘ |
| hasDome | yes ⓘ |
| hasFocalRatio |
f/4 (primary focus)
ⓘ
f/48 (Cassegrain focus) ⓘ |
| hasInstrument |
imaging cameras
ⓘ
photometers ⓘ spectrographs ⓘ |
| hasMirrorType | primary monolithic mirror ⓘ |
| languageOfName | Russian ⓘ |
| locatedInTimeZone | UTC+3 ⓘ |
| location |
Karachay-Cherkess Republic
ⓘ
linked to:
Karachay-Cherkessia
Nizhny Arkhyz ⓘ North Caucasus ⓘ Special Astrophysical Observatory of the Russian Academy of Sciences ⓘ |
| mirrorMaterial | glass-ceramic ⓘ |
| mountType | altazimuth mount ⓘ |
| notableFor |
being one of the largest optical telescopes in the world
ⓘ
largest single-aperture optical telescope at time of completion ⓘ |
| operator | Special Astrophysical Observatory of the Russian Academy of Sciences ⓘ |
| ownedBy | Russian Academy of Sciences ⓘ |
| previousLargestSingleApertureOpticalTelescope | Hale Telescope ⓘ |
| primaryScienceUse |
galaxy observations
ⓘ
optical astronomy ⓘ quasar observations ⓘ spectroscopy of faint objects ⓘ stellar astrophysics ⓘ |
| telescopeType | Ritchey–Chrétien reflector ⓘ |
| usedFor |
extragalactic astronomy
ⓘ
spectral classification of stars ⓘ stellar population studies ⓘ study of active galactic nuclei ⓘ supernova observations ⓘ |
| wavelengthRange |
near-infrared
ⓘ
optical ⓘ |
| yearCompleted | 1975 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: BTA-6 telescope Description of subject: The BTA-6 telescope is a 6-meter optical reflecting telescope in Russia that became the world’s largest single-aperture optical telescope after the Hale Telescope.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.