Kibo, also called Ndora, was the fifth planet of System C-71. It was uninhabitable by humanoids, having lethally high levels of energy.
In 2266, a Bandit asteroid ship being pursued by the USS Enterprise launched a missile toward Kibo. Believing that it contained evidence to clear James T. Kirk of charges of treason, Spock and Leonard McCoy used cerebots to go to the planet and find the missile. They were attacked by the Energy Dragon, but the Spock cerebot drove it off with a phaser and they returned to the Enterprise with the evidence. (TOS comic: "The Trial of Captain Kirk")