Pheben V was a planet located in the space of the galaxy's Alpha or Beta Quadrants, the fifth planet in orbit of the Pheben star system. Pheben V was the homeworld of the Pheben civilization. (GKN novel: A Good Day to Die) In 2379, Rov, a member of the Klingon rebel group klahb, used a communications center on Pheben V to broadcast a message to the entire Klingon Empire. Rov revealed that Emperor Kahless was a hologram and he blamed the Federation for the deception. He also demanded that Chancellor Martok step down and that the Empire end its alliance with the Federation.