Pheben system
The Pheben system was a star system in the Beta Quadrant. 

In 2256, this system's location was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the . The system was located in Klingon space. ()

A year later, its location was labeled on the star chart showing the trajectory of Lieutenant Spock's shuttle. ()

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This system's symbol was a red Klingon Empire logo, indicating its affiliation with the empire. () 

In 2365, the Klingon Bird-of-Prey  was conducting undesignated maneuvers in the Pheben system shortly after it rendezvoused with the  to pick up exchange officer Commander William T. Riker. ()

In 2399, this system's location in neutral space was labeled on a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. ()

Appendices

Background information 
According to Star Trek: Star Charts (p. 63) and Stellar Cartography: The Starfleet Reference Library ("Stellar Cartography", pp. 27, 30; "Federation Historical Highlights, 2161-2385”), the Pheben system was on the front line of the Klingon Civil War in 2367-68. The same source also described the system's primary as a G-class star. According to a map of the Klingon Empire – prepared by the Scribe K'Tark for the Klingon High Council in the Year of Kahless 893 (2266) – Pheben was identified as a Klingon system.

Apocrypha 
According to the Star Trek: Klingon Empire s,  was a Klingon farming colony, while  was the homeworld of the non-humanoid  race, which served the Klingon Empire.

External link 
 

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Star systems