Draconia

Draconia was the home planet of the Draconians. The Doctor visited Draconia several times, once during the beginning of the Dalek-Human-Draconian conflict, and once prior to that. (DW: Frontier in Space)

The planet was mentioned again when the Doctor was listing worlds with a mythology involving a horned 'devil' of the likes that Earth and Daemos had. (DW: The Satan Pit)

Mr. Smith once told Luke Smith that Draconia was home to one of many cultures throughout the galaxy who had developed its own brand of astrology. However, the super-computer did not specify whether this pseudo-science was invented by the race commonly known as Draconians, or by some preceding or co-existing sentient species. (SJA: Secrets of the Stars)