Trekipedia

Daran V

A Class-M Federation planet with a population of 3,724,000. In 2268, the U.S.S. Enterprise NCC-1701 was sent to divert what was thought to be an asteroid on a collision course with the planet. The asteroid actually turned out to be the multigenerational spaceship Yonada, built 10,000 years earlier by the Fabrini to save their race before their sun went nova.^[1]

References

• ^[1]TOS-65: For the World is Hollow and I Have Touched the Sky