Beatmania IIDX 17: Sirius is the 17th installment in Konami's Beatmania IIDX series of music video games. The main motif of Sirius's UI is astronomy, as the game is named after Sirius, known to be the brightest star in the night sky. Public location tests began on May 27, 2009, and the game itself was released on October 21, 2009.