Star
Kaus Australis
Blue-white star · B9.5III
ε Sagittarii · Sagittarius
Shown in its true colour — like most stars, it is too far away to photograph as more than a point of light.
Epsilon Sagittarii, formally named Kaus Australis, is a binary star system in the southern zodiac constellation of Sagittarius. The apparent visual magnitude of +1.85 makes it the brightest star in Sagittarius. Based upon parallax measurements, this star is around 143 light-years from the Sun.
Description from Wikipedia (CC BY-SA 4.0).
In your sky
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Key facts
Distance
~143 light-years
Apparent mag.
+1.79
Spectral type
B9.5III
Luminosity
323 × Sun
Absolute mag.
−1.42
Catalogue
HIP 90185
Spectral type
B9.5III
True colour from its B–V index (-0.03): a surface around 10500 K.
Did you know
- Kaus Australis is also known as ε Sagittarii.
- Its spectral type B9.5III marks it as a blue-white star.
- It lies in the constellation Sagittarius.
