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.

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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 Zij-i Jadid-i Sultani
linked to: Zīj-i Sultānī
approximateCompletionDate around 1437
associatedWithSchool Samarkand school of astronomy
basedOn observations at Samarkand observatory
compiledAt Samarkand observatory
compiledBy Ulugh Beg
compiledInCity Samarkand
compiledInPresentDayCountry Uzbekistan
compiledInRegion Timurid Empire
linked to: Timurid dynasty
compiledUsingInstrument armillary sphere
large meridian arc sextant
contains planetary tables
star catalogue
tables of eclipses
tables of planetary positions
trigonometric tables
dedicatedTo Ulugh Beg as sultan
linked to: Ulugh Beg
editorOrCollaborator Ali Qushji
linked to: Al-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 Ptolemy's Almagest
linked to: 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

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Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Islamic astronomy hasKeyText Ulugh Beg's Zij-i Sultani
Ulugh Beg notableWork Ulugh Beg astronomical tables
linked to: Ulugh Beg's Zij-i Sultani