Theta Scorpii is a bright star in the constellation Scorpius that is visible to the naked eye. It has expanded to about 26 times the size of the Sun and radiates over 1,800 times as much energy. Theta Scorpii is a rapidly rotating bright giant star that has an oblate shape and a yellow-white glow. It has a magnitude 5.36 companion star located over 6 arcseconds away.

1. Theta Scorpii (θ Sco, θ Scorpii) is a star in the
southern zodiacconstellationof Scorpius.
It has the traditional name Sargas,ofSumerianorigin.[10]
In Chinese, it is
referred to as 尾宿五 (Mandarin: wěi xiù wǔ), the Fifth Star of the
Tail.[citation needed]
The apparent visual magnitude of this star is
+1.87,[2]
making it readily visible to the naked eye and one of
the brightest stars in the night sky.
This is an evolved brightgiant star with a stellar classificationof
F0 II.[3]
With a mass 5.7 times that of the Sun, it has expanded to about
26[6]
times the Sun's radius. It is radiating 1,834[5]
times as much
luminosity as the Sun from its outer envelope at an effective
temperature of 7,268,[5]
giving it the yellow-white hued glow of an F-type
star. This star is rotating rapidly, giving it an oblate shape with an
equatorial radius 19% larger than the polar radius.[8]
It has a magnitude 5.36 companion at an angular separation of
6.470 arcseconds.[11]
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