From Halopedia, the Halo wiki
The Svir system is a planetary system located near the triple star system that Sanghelios orbits. It is home to one star, Svir, and the planet Te, which is the Lekgolo homeworld. Te possesses a planetary ring which was once a Forerunner artifact that was later devoured by the Lekgolo. Though the system’s location was not a secret, lack of interest ensured it was missing from many navigational databases and charts. Following the loss of High Charity, few intact records of routes to the system remain, with most of these located in remote archives. The Banished have expressed interest in recovering these records, presumably to press new colonies into their service and reassess Forerunner ruins with knowledge they ransacked at the Ark.