天苑四
During the past million years, three stars are believed to have come within of Epsilon Eridani. The most recent and closest of these encounters was with Kapteyn's Star, which approached to a distance of about roughly 12,500 years ago. Two more distant encounters were with Sirius and Ross 614. None of these encounters are thought to have been close enough to affect the circumstellar disk orbiting Epsilon Eridani.