Theta Sagittae
Theta Sagittae is a double star in the northern constellation of Sagitta. With an apparent visual magnitude of +6.48, 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 22.15 mas as seen from Earth, it is located roughly 147 light years from the Sun.
The primary, component A, is an F-type subgiant star with a stellar classification of F5 IV. 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 11.58 arc seconds along a position angle of 331.1°, as of 2011.
