No details of the 9th century Islamic astronomer Ali ibn Sulayman al-Hashimi's life are recorded, but he flourished in 890.
[1] Al-Hashimi's only known major work is the Kitāb fīʿilal al‐zījāt ("Book of the Reasons Behind Astronomical Tables"), which possibly dates from the late 9th century.
[1] It is a discussion of the astronomical ideas of the Greeks, Indians and Persians, which characterized Islamic astronomy before the arrival of the Ptolemaic tradition, and includes the basic theories underlying zījes, chronology, planetary cycles and equations, eclipses, timekeeping, and astrology.
[2] The work lacks an organized structure or any critical comments about other astronomers, and is prone to technical errors made by al-Hashimi, as well as mistakes by later copyists.
[2] Kitāb fīʿilal al‐zījāt is extant in a unique manuscript now preserved at the Bodleian Library, Oxford University (MS. Arch.