Lunar Observation Center
E222801
The Lunar Observation Center is an astronomical facility within the Abraj Al Bait complex in Mecca used to observe the moon for determining Islamic calendar dates and religious occasions.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lunar Observation Center canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T1987953 — 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: Lunar Observation Center Context triple: [Abraj Al Bait complex, hasPart, Lunar Observation Center]
-
A.
Mamalluca Observatory
Mamalluca Observatory is a popular public astronomical observatory in Chile’s Elqui Valley, renowned for its exceptionally clear skies and stargazing tourism.
-
B.
Pangue Observatory
Pangue Observatory is a small, privately run astronomical observatory in Chile’s Elqui Valley, known for its exceptionally clear skies and public stargazing tours.
-
C.
Las Campanas Observatory
Las Campanas Observatory is a major astronomical observatory in Chile renowned for its high-quality observing conditions and its role in cutting-edge optical and infrared astronomy.
-
D.
MMT Observatory
The MMT Observatory is a major astronomical research facility in Arizona known for its innovative multiple-mirror design and contributions to optical and infrared astronomy.
-
E.
Goodsell Observatory
Goodsell Observatory is a historic astronomical observatory on the campus of Carleton College in Northfield, Minnesota, known for its distinctive Romanesque architecture and long-standing role in teaching and research in astronomy.
- 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: Lunar Observation Center Target entity description: The Lunar Observation Center is an astronomical facility within the Abraj Al Bait complex in Mecca used to observe the moon for determining Islamic calendar dates and religious occasions.
-
A.
Mamalluca Observatory
Mamalluca Observatory is a popular public astronomical observatory in Chile’s Elqui Valley, renowned for its exceptionally clear skies and stargazing tourism.
-
B.
Pangue Observatory
Pangue Observatory is a small, privately run astronomical observatory in Chile’s Elqui Valley, known for its exceptionally clear skies and public stargazing tours.
-
C.
Las Campanas Observatory
Las Campanas Observatory is a major astronomical observatory in Chile renowned for its high-quality observing conditions and its role in cutting-edge optical and infrared astronomy.
-
D.
MMT Observatory
The MMT Observatory is a major astronomical research facility in Arizona known for its innovative multiple-mirror design and contributions to optical and infrared astronomy.
-
E.
Goodsell Observatory
Goodsell Observatory is a historic astronomical observatory on the campus of Carleton College in Northfield, Minnesota, known for its distinctive Romanesque architecture and long-standing role in teaching and research in astronomy.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
Islamic moon-sighting facility
ⓘ
astronomical observatory ⓘ |
| associatedWith |
Abraj Al Bait Towers
ⓘ
linked to:
Abraj Al Bait complex
Islamic lunar calendar ⓘ Masjid al-Haram vicinity ⓘ |
| calendarSystem | Hijri calendar ⓘ |
| country | Saudi Arabia ⓘ |
| locatedIn |
Abraj Al Bait complex
ⓘ
Makkah Province ⓘ Mecca ⓘ Saudi Arabia ⓘ |
| name | Lunar Observation Center ⓘ |
| nearbyLandmark |
Great Mosque of Mecca
ⓘ
linked to:
Masjid al-Haram
|
| observationTarget | Moon ⓘ |
| observationType |
astronomical observation
ⓘ
lunar observation ⓘ |
| primaryFunction |
determining Islamic calendar dates
ⓘ
moon observation ⓘ supporting religious occasion determinations ⓘ |
| purpose |
provide accurate visual confirmation of crescent
ⓘ
support official moon-sighting committees ⓘ |
| religiousContext | Islam ⓘ |
| religiousRole | supporting determination of Islamic religious occasions ⓘ |
| structurePartOf | Abraj Al Bait complex ⓘ |
| timekeepingBasis | lunar cycles ⓘ |
| usedFor |
Dhul-Hijjah moon sighting
ⓘ
Ramadan moon sighting ⓘ Shawwal moon sighting ⓘ determining beginning of Hijri months ⓘ observing new crescent moon ⓘ |
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: Lunar Observation Center Description of subject: The Lunar Observation Center is an astronomical facility within the Abraj Al Bait complex in Mecca used to observe the moon for determining Islamic calendar dates and religious occasions.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.