Sappora VII was just outside Federation space, and the location of a large pergium mining operation owned by Yanas Tigan. Ezri Dax lived on Sappora VII as a child, where she had a holoplayroom. (DS9 - The Lives of Dax short story: "Second Star to the Right...") It is unclear whether Sappora VII is the same world as New Sydney, established as the Tigans' home in DS9 episode: "Prodigal Daughter".