Bandraginus V

Bandraginus V was a Vegan shipyard. (PROSE: First Frontier) It had about a billion inhabitants, the Fourth Doctor calling it "a planet of a thousand million souls". Some time before its engulfment of Calufrax, Zanak materialised around Bandraginus V, mining it for all its mineral wealth, including Oolion, an element only found on Bandraginus V and Qualactin. Following this, the Captain super-compressed it and added Bandraginus V to his collection. (TV: The Pirate Planet)

Behind the scenes
The name "Bantraginus V" is likely a reference to "", the home for one of the key ingredients in in Douglas Adams's The Hitchhiker's Guide to the Galaxy. The Pirate Planet was Douglas Adams' first contribution to Doctor Who.