ALHABOR is the Arabic name for Sirius, the brightest star in the constellation Canis Major or the Greater Dog.

Alhabor, a fair white star, is one of the fixed stars and lies 18 degrees on the west of the midday line; this is calculated on the back side of the rule or narrow revolving plate on the back of the astrolabe, used for measuring and taking altitudes, Astr II.3. 41-49. [Algomeyse: Syrius]

Alhabor is derived from the first part of the Arabic phrase al-'abur al-Yamaniyyah or "the passage of the South," a reference to the route taken by Canopus in the Arabic version of the myth of Canopus and Sirius.