Tritek

Tritek, home of the Tritekians, is a planet only mentioned by name, when Nappa explains that the batch of Saibamen used against the Z Fighters on Earth is the same as the "one[s] that survived that crazy battle on Tritek."

Possible identification
Both Vegeta and Nappa made their debut (Anime: Gohan's Rage, Manga:The Needs of the Many) on a weird green planet located about 1 year of space pod's flight speed from Earth. They're seen the only sapience creatures that are still alive on the planet, after they killed and ate the natives.

This planet looks like the Earth during the Carboniferous Period.