Capella IV

Capella IV is a planet located in the Beta Quadrant near the Klingon Empire, and is home to the Capellans.

Because of Capella IV's strategic location along the Klingon-Federation border, both sides have made engroves on the planet. After the Federation made contact, Starfleet Medical sent a medical relief mission to the planet in 2264, but that was a failure.

In 2267, Teer Akaar was killed by his rival Maab with Klingon help. However, it was with the effort of Captain James T. Kirk and the crew of the USS Enterprise that the Klingons plan to subvert the planet failed.

(TOS novels: My Brother's Keeper, Book 3: Enterprise and Invasion!, Book 1: First Strike; also TOS novelization: "Friday's Child", Star Trek 3).