Zij-i sultani زيج سلطانى

This is astronomical table and star catalogue that was published by Ulugh Beg in 1438–1439. The book is joint effort of prominent muslim astronomers of time including Jamshid al-Kashi and Ali Qushji with support and contribution of Ulugh Beg at Samarkand’s Ulugh Beg Observatory.

Check details and download on OPENN

https://openn.library.upenn.edu/Data/0032/html/ms_or_001.html

Alternatively download from Archive.org