Triangulum Australe, the Southern Triangle, is one of the more obvious asterisms in the southern skies, found east of Centaurus. The constellation contains a fine cluster suitable for binoculars.
Alpha Trianguli Australis, the brightest star in this compact constellation southeast of alpha Centauri, forms the eastern corner of the large equilateral Southern Triangle. The asterism is easily found with the naked eye. From alpha Centauri look just to the southeast from the twin stars alpha and beta Centauri. Many fainter stars are grouped around alpha, including two Bayer stars. Note that some are in the nearby constellations of Apus and Ara.
Beta Trianguli Australis forms the apex of the equilateral Southern Triangle. Between beta and delta Tra (to the east of beta) directly north three degrees is the splendid open cluster NGC 6025, well-seen in binoculars. The thirty or so members are 7th-mag or fainter.
