Ulugh Beg's Zij-i Sultani
E316752
Ulugh Beg's Zij-i Sultani is a 15th-century astronomical star catalogue and set of planetary tables compiled at the Samarkand observatory, renowned for its remarkably accurate measurements and lasting influence on later astronomy.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Ulugh Beg astronomical tables | 1 |
| Ulugh Beg's Zij-i Sultani canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2931372 — 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.
Target entity: Ulugh Beg's Zij-i Sultani Context triple: [Islamic astronomy, hasKeyText, Ulugh Beg's Zij-i Sultani]
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A.
Al-Battani's Zij al-Sabi
Al-Battani's Zij al-Sabi is a seminal medieval astronomical handbook that refined Ptolemaic models and provided highly accurate planetary and solar tables widely used in the Islamic world and later in Europe.
-
B.
Al-Zarqali's Toledan Tables
Al-Zarqali's Toledan Tables are a highly influential set of medieval astronomical tables, compiled in Toledo, that provided precise planetary positions and were widely used across the Islamic world and later in Europe.
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C.
Al-Farghani's Elements of Astronomy
Al-Farghani's Elements of Astronomy is a foundational 9th-century Arabic treatise that systematically summarizes and explains Ptolemaic astronomy and became highly influential in both the Islamic world and medieval Europe.
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D.
Al-Sufi's Book of Fixed Stars
Al-Sufi's Book of Fixed Stars is a 10th-century astronomical treatise that systematically revised and illustrated Ptolemy’s star catalog, becoming a foundational work in medieval Islamic and later European astronomy.
-
E.
Maragha observatory
The Maragha observatory was a major 13th-century astronomical center in Persia, renowned for its advanced instruments and influential contributions to Islamic and global astronomy.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Ulugh Beg's Zij-i Sultani Target entity description: Ulugh Beg's Zij-i Sultani is a 15th-century astronomical star catalogue and set of planetary tables compiled at the Samarkand observatory, renowned for its remarkably accurate measurements and lasting influence on later astronomy.
-
A.
Al-Battani's Zij al-Sabi
Al-Battani's Zij al-Sabi is a seminal medieval astronomical handbook that refined Ptolemaic models and provided highly accurate planetary and solar tables widely used in the Islamic world and later in Europe.
-
B.
Al-Zarqali's Toledan Tables
Al-Zarqali's Toledan Tables are a highly influential set of medieval astronomical tables, compiled in Toledo, that provided precise planetary positions and were widely used across the Islamic world and later in Europe.
-
C.
Al-Farghani's Elements of Astronomy
Al-Farghani's Elements of Astronomy is a foundational 9th-century Arabic treatise that systematically summarizes and explains Ptolemaic astronomy and became highly influential in both the Islamic world and medieval Europe.
-
D.
Al-Sufi's Book of Fixed Stars
Al-Sufi's Book of Fixed Stars is a 10th-century astronomical treatise that systematically revised and illustrated Ptolemy’s star catalog, becoming a foundational work in medieval Islamic and later European astronomy.
-
E.
Maragha observatory
The Maragha observatory was a major 13th-century astronomical center in Persia, renowned for its advanced instruments and influential contributions to Islamic and global astronomy.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
15th-century scientific work
ⓘ
astronomical star catalogue ⓘ planetary tables ⓘ zij ⓘ |
| accuracyComparedToModern | errors of star positions typically within a few arcminutes ⓘ |
| alternativeName |
Zīj-i Sultānī
ⓘ
surface form:
Zij-i Jadid-i Sultani
|
| approximateCompletionDate | around 1437 ⓘ |
| associatedWithSchool |
Ulugh Beg observatory
ⓘ
surface form:
Samarkand school of astronomy
|
| basedOn | observations at Samarkand observatory ⓘ |
| compiledAt |
Ulugh Beg observatory
ⓘ
surface form:
Samarkand observatory
|
| compiledBy | Ulugh Beg ⓘ |
| compiledInCity | Samarkand ⓘ |
| compiledInPresentDayCountry | Uzbekistan ⓘ |
| compiledInRegion |
Timurid dynasty
ⓘ
surface form:
Timurid Empire
|
| compiledUsingInstrument |
armillary sphere
ⓘ
large meridian arc sextant ⓘ |
| contains |
planetary tables
ⓘ
star catalogue ⓘ tables of eclipses ⓘ tables of planetary positions ⓘ trigonometric tables ⓘ |
| dedicatedTo |
Ulugh Beg
ⓘ
surface form:
Ulugh Beg as sultan
|
| editorOrCollaborator |
Al-Qushji
ⓘ
surface form:
Ali Qushji
Qadi Zada al-Rumi ⓘ |
| epoch | 15th century ⓘ |
| field | astronomy ⓘ |
| historicalSignificance |
bridge between classical and early modern astronomy
ⓘ
one of the last major works of medieval Islamic astronomy ⓘ |
| includesMeasurement |
length of the sidereal year
ⓘ
obliquity of the ecliptic ⓘ |
| influenced | later zij compilations ⓘ |
| influencedBy |
Almagest
ⓘ
surface form:
Ptolemy's Almagest
earlier Islamic zijes ⓘ |
| language |
Arabic
ⓘ
Persian ⓘ |
| notableFor |
high accuracy of star positions
ⓘ
influence on later European astronomy ⓘ influence on later Islamic astronomy ⓘ precise planetary tables ⓘ |
| numberOfStars | about 1018 ⓘ |
| tradition | Islamic astronomy ⓘ |
| usedFor |
astrological calculations
ⓘ
calendar reform ⓘ navigation ⓘ timekeeping ⓘ |
| usesCoordinateSystem | ecliptic coordinates ⓘ |
| usesUnit | sexagesimal system ⓘ |
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.
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.
Subject: Ulugh Beg's Zij-i Sultani Description of subject: Ulugh Beg's Zij-i Sultani is a 15th-century astronomical star catalogue and set of planetary tables compiled at the Samarkand observatory, renowned for its remarkably accurate measurements and lasting influence on later astronomy.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.