Cerro Pachón
E83732
Cerro Pachón is a high-altitude mountain peak in the Chilean Andes renowned as a premier site for professional astronomical observatories due to its clear, dry skies and stable atmospheric conditions.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Cerro Pachón canonical | 10 |
| Cerro Pachón, Chile | 6 |
| Cerro Pachón Observatory site | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T673826 — 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: Cerro Pachón Context triple: [Gemini South Observatory, locatedOn, Cerro Pachón]
-
A.
La Silla mountain
La Silla mountain is a peak in Chile’s Atacama Desert that hosts major astronomical facilities and is known for its exceptionally clear, dark skies.
-
B.
La Silla Observatory
La Silla Observatory is a major European Southern Observatory (ESO) facility in Chile known for its high-altitude optical telescopes that have contributed significantly to exoplanet and stellar research.
-
C.
Paranal Observatory
Paranal Observatory is a major astronomical research facility in Chile’s Atacama Desert that hosts the European Southern Observatory’s Very Large Telescope array.
-
D.
Cerro de la Silla
Cerro de la Silla is a distinctive saddle-shaped mountain and iconic natural symbol overlooking the city of Monterrey in northeastern Mexico.
-
E.
Mulhacén
Mulhacén is the tallest mountain in mainland Spain, located in the Sierra Nevada range of the Iberian Peninsula.
- 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: Cerro Pachón Target entity description: Cerro Pachón is a high-altitude mountain peak in the Chilean Andes renowned as a premier site for professional astronomical observatories due to its clear, dry skies and stable atmospheric conditions.
-
A.
La Silla mountain
La Silla mountain is a peak in Chile’s Atacama Desert that hosts major astronomical facilities and is known for its exceptionally clear, dark skies.
-
B.
La Silla Observatory
La Silla Observatory is a major European Southern Observatory (ESO) facility in Chile known for its high-altitude optical telescopes that have contributed significantly to exoplanet and stellar research.
-
C.
Paranal Observatory
Paranal Observatory is a major astronomical research facility in Chile’s Atacama Desert that hosts the European Southern Observatory’s Very Large Telescope array.
-
D.
Cerro de la Silla
Cerro de la Silla is a distinctive saddle-shaped mountain and iconic natural symbol overlooking the city of Monterrey in northeastern Mexico.
-
E.
Mulhacén
Mulhacén is the tallest mountain in mainland Spain, located in the Sierra Nevada range of the Iberian Peninsula.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical observatory site
ⓘ
mountain ⓘ |
| access | road from La Serena vicinity ⓘ |
| atmosphericSeeing | good ⓘ |
| atmosphericWaterVapor | low ⓘ |
| climate | arid ⓘ |
| country | Chile ⓘ |
| distanceToCity | roughly 80–90 km from La Serena ⓘ |
| elevation |
approximately 2715 meters
ⓘ
approximately 8910 feet ⓘ |
| hasObservatory |
Gemini South Observatory
ⓘ
SOAR Telescope ⓘ Vera C. Rubin Observatory ⓘ |
| hemisphere | Southern Hemisphere ⓘ |
| hosts |
Gemini South Observatory
ⓘ
surface form:
Gemini South 8.1-meter telescope
Vera C. Rubin Observatory ⓘ
surface form:
Rubin Observatory Simonyi Survey Telescope
Southern Astrophysical Research Telescope ⓘ |
| infrastructure |
astronomical observatory facilities
ⓘ
power and communications for observatories ⓘ support buildings for telescopes ⓘ |
| knownFor |
clear skies
ⓘ
dry climate ⓘ excellent astronomical observing conditions ⓘ stable atmosphere ⓘ |
| lightPollution | low ⓘ |
| locatedIn |
Andes
ⓘ
Coquimbo Region ⓘ northern Chile ⓘ |
| near |
Cerro Tololo Inter-American Observatory
ⓘ
surface form:
Cerro Tololo
Cerro Tololo Inter-American Observatory ⓘ |
| observingNightsPerYear | high fraction of photometric nights ⓘ |
| ownership | land used under agreements with Chilean authorities ⓘ |
| partOf |
Andes
ⓘ
surface form:
Chilean Andes
|
| region | Elqui Province ⓘ |
| scientificRole |
key site for southern optical/IR astronomy
ⓘ
major site for large survey telescope ⓘ |
| skyCoverage | southern sky ⓘ |
| skyQuality | dark skies ⓘ |
| telescopeAperture |
4.1-meter (SOAR)
ⓘ
8.1-meter (Gemini South) ⓘ 8.4-meter effective (Rubin Observatory primary mirror) ⓘ |
| terrain | high-altitude ridge in the Andes ⓘ |
| usedBy | international astronomy community ⓘ |
| usedFor |
infrared astronomy
ⓘ
optical astronomy ⓘ wide-field sky surveys ⓘ |
| weatherPattern | predominantly clear nights ⓘ |
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: Cerro Pachón Description of subject: Cerro Pachón is a high-altitude mountain peak in the Chilean Andes renowned as a premier site for professional astronomical observatories due to its clear, dry skies and stable atmospheric conditions.
Referenced by (17)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
GeMS
subject surface form:
GSAOI
this entity surface form:
Cerro Pachón, Chile
subject surface form:
GSAOI
this entity surface form:
Cerro Pachón Observatory site
subject surface form:
GMOS-S
this entity surface form:
Cerro Pachón, Chile
this entity surface form:
Cerro Pachón, Chile
this entity surface form:
Cerro Pachón, Chile
this entity surface form:
Cerro Pachón, Chile
subject surface form:
Gemini South
this entity surface form:
Cerro Pachón, Chile