Qqaba

Qqaba was the star that Omega and Rassilon detonated with the Hand of Omega to create the black hole to enable time travel. (DWM: Star Death, DW: Remembrance of the Daleks) It was located 9.6 light-years from Gallifrey in the constellation of Ao, in the Veil Nebula. (NA: Lungbarrow)

In one universe, Qqaba was the last of the Population III stars. (PDA: The Infinity Doctors)