Editing Theta Scorpii (section)

==Properties==
The primary (θ Scorpii A) is an [[stellar evolution|evolved]] [[bright giant]] star with a [[stellar classification]] of F0&nbsp;II.<ref name=houk1978/> With a mass 3.10 times that [[solar mass|of the Sun]], it is radiating 1,400<ref name=Lewis/> times as much luminosity [[solar luminosity|as the Sun]] from its [[stellar atmosphere|outer envelope]] at an [[effective temperature]] of 6,294&nbsp;K,<ref name=Lewis/> giving it the yellow-white-hued glow of an [[F-type star]]. This star is rotating rapidly, giving it an [[Oblate spheroid|oblate shape]] with an equatorial radius 33% larger than the polar radius. The equatorial radius is about {{solar radius|36|link=y}} while the polar radius is only about {{solar radius|26}}.  This rapid rotation suggests that it formed via the merger of a [[binary star]] system.<ref name=Lewis/>

A magnitude 5.36 companion has been reported at an [[angular separation]] of 6.470&nbsp;[[arcseconds]],<ref name=mnras389_2_869/> but subsequent observers have failed to detect it, so it probably does not exist. However, a secondary, designated θ Scorpii B, has been detected at an angular separation of 0.538&nbsp;arcseconds in 1991 by the Hipparcos satellite.<ref name=Lewis/>