Ophiuchus (/ɒfiˈjuːkəs/) is a large constellation straddling the celestial equator. Its name is from the Greek Ὀφιοῦχος (Ophioukhos, 'serpent-bearer'), and it is commonly represented as a man grasping a snake (symbol ⛎, Unicode U+26CE). The serpent is represented by the constellation Serpens. Ophiuchus was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one of the 88 modern constellations. It was formerly referred to as Serpentarius (/sɜːrpənˈtɛəriəs/) and Anguitenens.