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 $0.567$, it is located 3,030 light years from the Earth.

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 $2.2$.