Qāḍī Zāda al-Rūmī

transl|ar|ALA|Qāḍī Zāda al-Rūmī (1364 in Bursa, Turkey – 1436 in Samarkand, Uzbekistan), whose actual name was Salah al-Din Musa Pasha (transl|ar|ALA|Qāḍī Zāda means "son of the judge"), was an astronomer and mathematician who worked at the observatory in Samarkand. He computed sin 1° to an accuracy of 10^-12.

Together with Ulugh Beg, al-Kāshī and a few other astronomers he produced the "Zij-i-Sultani", the first comprehensive stellar catalogue since the Maragheh observatory's "Zij-i Ilkhani" two centuries earlier. The "Zij-i Sultani" contained the positions of 992 stars.

Further reading

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*DSB|first=H.|last=Dilgan|title=Qāḍī Zāda al-Rūmī
*MacTutor|id=Qadi_Zada|title=Qadi Zada al-Rumi
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*cite journal|first=B. A.|last=Rozenfel'd|coauthors=A. P. Yushkevich|title=The treatise of Qadi Zada al-Rumi on the determination of the sine of one degree|language=Russian|journal=Istor.-Mat. Issled.|volume=13|year=1960|pages=33–538
*cite journal|first=B. A.|last=Rozenfel'd |coauthors=A. P. Yushkevich|title=Notes on a treatise of Qadi Zada al-Rumi|language=Russian|journal=Istor.-Mat. Issled.|volume=13|year=1960|pages=552–556