۞ Acumen is an open cluster of stars above the stinger of the Scorpion. Acumen is a companion cluster to Aculeus. Both Acumen and Aculeus are known as the “Blind Stars”, because they are associated with eyesight problems and blindness.
۞ Acumen gives a sharp mind and a good perception, but also warns of a tendency to see the worst rather than the best in everything, as well as a tendency to be either the ‘hellfire and damnation brigade’ or to be fiercely anti-religious.
۞ Acumen effects the eyesight and causes blindness in one or both eyes if in conjunction with an afflicted luminary, or in conjunction with a malefic that afflicts the luminaries.
۞ According to Ptolemy Acumen is of the nature of Mars and Moon.
۞ Position of Fixed Star Acumen in the year 5760 (2000 C.E.): 28°45′ Sagittarius.
۞ Sphene (Titanite) is the Birthstone of 28°-29° Sagittarius and the 28th of Kislev.