Triangulum Australelies in the Milky Way near Alpha and Beta Centauri and is the southern counterpart of the northern triangle, Triangulum. Although smaller than Triangulum, it is more prominent because its main stars are brighter. It is the smallest of the 12 constellations introduced at the end of the 16th century by the Dutch navigators Pieter Dirkszoon Keyser and Frederick de Houtman. Its brightest star is Alpha Trianguli Australis, magnitude 1.9.
Depiction: The Southern Triangle
Pronounced: tri-ANG-you-lum oss-TRAH-lee
Genitive: Trianguli Australe
Highest in the Sky: June to July
Size Ranking: 83rd
Coverage Area: 110 Sq. Degrees
Right Acension: 16 hours
Visibility: 16°N to 90°S
NGC 5844: Planetary nebula
NGC 5979: Planetary nebula
NGC 6025: Open cluster
Best Viewed Objects/Stars
An open cluster in the Milky Way, about one-third apparent width of the full Moon and easy to see with binoculars or a small telescope, its brightest star being of 7th magnitude. It lies 2,500 light-years away.