blue-white B9.5V main sequence star that is 2.9 times as massive as the Sun. The two orbit each other every ten years. Zeta Sagittae is a triple star system, approximately from Earth. The primary and secondary are A-type stars. In his Uranometria, Bayer depicted Alpha, Beta, and Epsilon Sagittae as the fins of the arrow. Also known as Sham, Alpha is a yellow bright giant star of spectral class G1 II with an apparent magnitude of 4.38, which lies at a distance of from Earth. Four times as massive as the Sun, it has swollen and brightened to 20 times the Sun's diameter and 340 times its luminosity. Also of magnitude 4.38, Beta is a G-type giant located distant from Earth. Estimated to be around 129 million years old, it is 4.33 times as massive as the Sun, and has expanded to roughly 27 times its diameter. Epsilon Sagittae is a double star whose component stars can be seen in a small telescope. With an apparent magnitude of 5.77, the main star is a 331-million-year-old yellow giant of spectral type G8 III around 3.09 times as massive as the Sun, that has swollen to its diameter. It is distant. The visual companion of magnitude 8.35 is 87.4 arcseconds distant, but is an unrelated blue supergiant around distant from Earth. Eta Sagittae is an orange giant of spectral class K2 III with a magnitude of 5.09. Located from Earth, it has a 61.1% chance of being a member of the Hyades-Pleiades stream of stars that share a common motion through space. Theta Sagittae is a double star system, with components 12 arcseconds apart visible in a small telescope. At magnitude 6.5, the brighter is a yellow-white main sequence star of spectral type F3 V, located from Earth. The 8.8-magnitude fainter companion is a main sequence star of spectral type G5 V. A 7.4-magnitude orange giant of spectral type K2 III is also visible from the binary pair, located away. Variable stars Variable stars are popular targets for amateur astronomers, their observations providing valuable contributions to understanding star behaviour. R Sagittae is a member of the rare RV Tauri variable class of star. It ranges in magnitude from 8.2 to 10.4. It is around distant. It has a diameter times that of the Sun, and is as luminous, yet most likely is less massive than the Sun. An aging star, it has