S Trianguli Australis

S Trianguli Australis is a yellow-white hued variable star in the constellation Triangulum Australe. It is a dim star near the lower limit of visibility with the naked eye, having a typical apparent [visual magnitude] of 6.41. Based upon an annual parallax shift of, it is located 3,030 light years from the Earth.
Benjamin Apthorp Gould discovered that this star's brightness varies, and published that discovery in his 1879 work Uranometria Argentina. A Classical Cepheid variable, its apparent magnitude ranges from 5.95 to 6.81 over 6.32344 days. It is a bright giant with a nominal stellar classification of F8 II, that pulsates between spectral types F6II-G2. The star has 2.8 times the mass of the Sun and 39.2 times the Sun's radius. It is losing mass at the estimated rate of.