Klaestron IV was a planet, the fourth planet of the Klaestron star system, located in Federation space in the galaxy's Alpha Quadrant.
Klaestron IV was the homeworld of the Klaestron civilization. In the year 2369, Klaestron IV had an extradition treaty with the Federation. (DS9 episode: "Dax")
By 2378, this planet was considered a Federation member world. (ST reference: Star Charts)