アバカ
After 12 years of intense work by Tusi and other scientists, including Mu’yed al-Din al-Arad-Najmedin Cathy, Najmd al-Din Qazvini, Allame Qutbuddin Shirazi, and Fakhruddin Maraghi, the tables were compiled in the Zij-i Ilkhani. The tables were published during the reign of Abaqa Khan, Hulagu's son, and were named after the patron of the observatory.