AlcabitiusThe Alcabitius house system divides the diurnal arc of the Ascendant into six equal-sized segments. Then, Meridian circles are drawn through the resulting segments. The places where the circles intersect the ecliptic mark the cusps of the Alcabitius houses. The other house cusps can be calculated by adding 180° respectively. Alternatively, the nocturnal arc can be divided into six parts and Meridian circles drawn through the resulting segments. In this method, the Ascendant and MC are identical with the 1st and 10th house cusps. The Alcabitius house system assigns particular significance to the Ascendant-Descendant axis, because the measure of division is given by the diurnal arc of the zodiacal degree of the Ascendant at birth. The house system goes back to the Arab astrologer Abd al-Aziz ibn Uthman al-Qabisi (lat. Alcabitius †967). |