Zīj-i Īlkhānī (Persian: زیجِ ایلخانی‎) or Ilkhanic Tables (literal translation: "The Ilkhan Stars", after ilkhan Hulagu, who was the patron of the author at that time) is a Zij book with astronomical tables of planetary movements. It was compiled by the Muslim astronomer Nasir al-Din al-Tusi in collaboration with his research team of astronomers at the Maragha observatory. It was written in Persian and later translated into Arabic.