A Federation world of more than three billion people which the asteroid ship Yonada is set to strike in For the World Is Hollow and I Have Touched the Sky.
Daran V is a densely populated planet mentioned in the Original Series episode For the World Is Hollow and I Have Touched the Sky. Spock gives its population as 3,724,000,000.
The Enterprise discovers that the asteroid Yonada is under power and on a collision course with the planet, with a little over a year remaining before impact. Starfleet considers the danger serious enough to order Kirk onward once his first attempt to deal with the Oracle fails, leaving the problem to others.
Kirk and Spock return when McCoy sends word of a book that explains Yonada's origin. They reach the control room behind the Oracle's altar, repair the fault in the guidance system and put the ship back on its proper course, sparing Daran V.