Indus, constellation in the southern sky at about 21 hours right ascension and 50° south in declination. Its brightest star is Alpha Indi, with a magnitude of 3.1. This constellation was invented by Pieter Dircksz Keyser, a navigator who joined the first Dutch expedition to the East Indies in 1595 and who added 12 new constellations in the southern skies. It may represent a native of the East Indies.