Abu Ali al-Hasan al-Marrakushi

For other people with similar names, see Al-Marrakushi.

Abu Ali al-Hassan al-Marrakushi (Arabic: الحسن المراكشي; late 13th century) was a Maghreb astronomer and mathematician from the Kingdom of Morocco . He was especially important in the field of trigonometry and practical astronomy. He wrote Jāmiʿ al-mabādiʾ wa’l-ghāyāt fī ʿilm al-mīqāt (Collection of the Principles and Objectives in the Science of Timekeeping), a treatise on spherical astronomy and astronomical instruments.^[1] The first part was translated into French by the orientalist and astronomer Jean Jacques Emmanuel Sédillot [fr] during the early 19th century, and published after Sédillot's death.^{[2][page needed]}

Abu Ali al-Hassan al-Marrakushi
الحسن المراكشي
The Jami‘ al-Mabadi’ wa’l-Ghayat, (Khalili Collection of Islamic Art)
Born	fl. late 13th century
Academic work
Era	Islamic Golden Age
Main interests	Mathematics, astronomy
Notable works	Jāmiʿ al-mabādiʾ wa’l-ghāyāt fī ʿilm al-mīqāt (Collection of the Principles and Objectives in the Science of Timekeeping)

The treatise, which was written in Cairo between 1276 and 1282, is regarded as the most complete source to have survived about medieval Islamic astronomical instruments.^{[3][page needed][4]}

Legacy

The crater Al-Marrakushi on the Moon is named after him.^[5]