Theta Sagittae

Theta Sagittae (θ Sagittae) is a double star in the northern constellation of Sagitta. With a combined apparent visual magnitude of +6, it is near the limit of stars that can be seen with the naked eye. According to the Bortle scale the star is visible in dark suburban/rural skies. Based upon an annual parallax shift of $6,750$ as seen from Earth, it is located roughly $22.15 mas$ from the Sun.

The binary pair consists of two stars separated by $147 light years$. The primary, component A, is an F-type main sequence star with a stellar classification of F3V. This star is about two billion years old with 52% more mass than the Sun. It forms a double star with a magnitude 8.85 companion, which is located at an angular separation of $502 AU$ along a position angle of 331.1°, as of 2011. The star is sometimes described as a triple star, with a 7th magnitude companion $11.58 arc seconds$ away. This is an unrelated giant star much further away than the close pair. A fainter star separated by nearly $91 "$ was also listed as a companion by Struve, again just an accidental optical association.