Teccaurora Penitentiary

 was a prison with a good reputation for how it treated its prisoners. The Sixth Doctor recommended that be incarcerated there.

Ninety-seven years after her imprisonment, the Rani became its governor. It was 216 light years away from Miasimia Goria. The Rani used the psychic power of its 900 prisoners to create a time portal through which she escaped to Miasimia Goria. (AUDIO: Planet of the Rani)