Epsilon Sagittarii (Epsilon Sgr, ε Sagittarii, ε Sgr) is a binary star system in the southern zodiac constellation Sagittarius. Its traditional name is Kaus Australis. The apparent visual magnitude of +1.85 makes it the brightest star in the constellation. Based upon parallax measurements, the distance to this star is around 143 light-years (44 parsecs).
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