Pictor, constellation in the southern sky at about 6 hours right ascension and 60° south in declination. Its brightest star is Alpha Pictoris, with a magnitude of 3.3. The second brighest star, Beta Pictoris, is notable for an encircling disk of debris that might contain planets. The French astronomer Nicolas Louis de Lacaille formed this constellation in 1754. It represents a painter’s easel and was orginally called Equuleus Pictorius.