Voga

Voga, also known as the Planet of Gold, was a wandering asteroid captured by Jupiter's orbit. It was the homeworld of the Vogans and contained more gold than in the rest of the known galaxy. The Cybermen attempted to destroy it on at least one occasion. (DW: Revenge of the Cybermen). The Doctor commented on the planet being worth more than a thousand 1800's Sovereigns. (TDA: Wishing Well)