Canopus Planet

From Memory Alpha, the free Star Trek reference

Canopus Planet is a planet located in the Canopus system. In 1996, the poet Phineas Tarbolde wrote the famous love sonnet "Nightingale Woman" on this planet. (TOS: "Where No Man Has Gone Before")

Given its informal designation, it is possible that "Canopus Planet" might actually be one of the already known inhabited planets in the Canopus system: II, III, or V. The bios in Star Trek: Starship Creator speculate that Lieutenant Nara (TNG: "Eye of the Beholder") was from Canopus Planet.