Sigma Sagittarii is a star system located in the constellation of Sagittarius. As a proper noun, there are no synonyms for this specific term. However, beyond its name, Sigma Sagittarii is classified as a multiple star system, which means that it consists of two or more stars that orbit around a common center of mass. There are other multiple star systems that have been identified and classified, such as Alpha Centauri, Proxima Centauri, and Sirius. These star systems are characterized by their complex gravitational dynamics and may be of interest to astrophysicists studying stellar evolution and spectroscopy.