Centaurus is one of the 15 southern constellations of Ptolemy and is associated with Chiron in the West. It is next to Lupus. Centaurus appears to have fired an arrow, the constellation Sagitta, towards Aquila, the eagle that tortured Prometheus, thus appearing to release Prometheus from his torment. Centaurus is also under the ecliptic, and thus considered to be in the underworld. Cited from website Wiki: Centaurus EN.TE.NA.BAR.HUM = habasiranu