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Ibn Yunus

Type Figure Region Egypt Time c. 950–1009 Also known as Ibn Yunus、伊本·尤努斯、Ali ibn Yunus、ابن يونس、Abu al-Hasan Ali ibn Yunus

Fatimid Egyptian astronomer. Born around 950 in Fustat, he made long-term observations of eclipses and planets in Cairo, compiling the Hakimite Zij (…

Timeline

  1. c. 950–977Fustat · FustatBorn into a scholarly family in Fustat, with a historian father. In his early years he studied the Quran, hadith, mathematics, and Ptolemaic astronomy, laying the foundation for his later observational series in Cairo.
  2. 977–996Cairo · CairoFrom 977 he recorded eclipses, planetary conjunctions, and stellar altitudes in Cairo, with greater accuracy than the Indian-Persian tables then in use. Under al-Aziz he already enjoyed court support, and his observation sites were mostly around Mount Muqattam.
  3. 996–1009Cairo · CairoAfter al-Hakim's accession, Ibn Yunus compiled decades of observations into the Great Hakimite Zij, containing tables of precession, eclipses, and planets, and improved spherical trigonometric methods. He died in Cairo in 1009; the tables survived through his manuscripts.

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