Vacca VI was a class M planet in the Vacca system, located in an isolated area of Federation space. In 2370, Dr. Nikolai Rozhenko and the USS Enterprise-D relocated a group of Boraalans from their endangered homeworld, Boraal II, to Vacca VI. Dr. Rozhenko also remained on Vacca VI with the Boraalans. (TNG episode: "Homeward")