Al Achsasi al Mouakket

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Muḥammad al-Akhṣāṣī al-Muwaqqit (Arabic: محمد الاخصاصي الموقت‎) was an Egyptian astronomer whose calendarium and catalogue of stars, al-Durrah al-muḍīyah fī al-ʻamāl al-shamsīyah ("Pearls of brilliance upon the solar operations"), was written at Cairo about 1650.[1] Al-Akhsasi was a shaykh, a learned elder, of the Grand Mosque of the university of Cairo, where his name al-Muwaqqit reflected his position regulating the times and hours at the mosque. His name Akhsasi connects him in origin to a village in the Faiyum.[2]

No copies of his book were known to Western astronomers or historians of science until 1895;[3] thus he did not appear in the standard French and English bibliographies and library catalogues of the 19th century.


  1. ^ Knobel, E. B. (June 1895). "Al Achsasi Al Mouakket, on a catalogue of stars in the Calendarium of Mohammad Al Achsasi Al Mouakket". Monthly Notices of the Royal Astronomical Society. 55 (8): 429. Bibcode:1895MNRAS..55..429K. doi:10.1093/mnras/55.8.429.
  2. ^ Knobel 1895:429.
  3. ^ Knobel 1895.