Sigma Librae, also known as σ Librae, is a star located in the southern constellation Libra. The name Sigma Librae comes from the Greek letter sigma (σ) which is used to denote the star's position in the Libra constellation. Synonyms for Sigma Librae include HD 140437, SAO 182695, HR 5840, and HIP 77070. These different names refer to various astronomical catalogs and systems that identify and track celestial objects. Despite the different names, all synonyms for Sigma Librae refer to the same star, a magnitude 3.3 giant star approximately 293 light-years away from Earth.