Deneb Kaitos IV


 * You may also be looking for Deneb IV.

Deneb IV (or Deneb Kaitos IV) is a Class M planet located in the Deneb Kaitos system. (Reference book: Star Trek: Star Charts).

In the 2250s, James T. Kirk and Gary Mitchell visited the planet, and Mitchell became involved with a woman. For years afterward, Kirk would remark he had been worried about Mitchell since their visit to Deneb. (TOS episode/novelization: "Where No Man Has Gone Before").