Memory Alpha
Memory Alpha

Iota Geminorum IV, also known as Tribble Prime or the tribble homeworld, was the uninhabited fourth planet in the Iota Geminorum system, in the Beta Quadrant, and the homeworld of the tribble, as well as an abundance of reptiles, the latter keeping the former in check. In the 23rd century, this planet was within the Klingon Empire's sphere of influence. (ENT: "The Breach"; TOS: "The Trouble with Tribbles")

In 2257, this planet's location was labeled on the star chart showing the trajectory of Lieutenant Spock's shuttle. (DIS: "An Obol for Charon")

Iota Geminorum IV listed on an analysis of a tribble

Around stardate 1421.9, Starfleet scientist Edward Larkin genetically engineered sample specimens of tribbles from the planet. Larkin, who was later described as an idiot, believed them to be a suitable food source save for their very slow breeding rate, which he increased with disastrous consequences. (ST: "The Trouble with Edward")

In order to fulfill their self-given task to hunt the tribble species to extinction, a Klingon armada obliterated the tribbles' homeworld, and by the late 23rd century, the species was entirely eradicated. (DS9: "Trials and Tribble-ations")

Listed as native planet of the tribbles

In 2369, a chart illustrating various creatures, including tribbles, from around the known galaxy was displayed in a classroom aboard Deep Space 9. The tribble homeworld was mentioned on this chart. (DS9: "The Nagus", okudagram)

The back of the Hairy Berry Tribbles cereal box (not seen on screen) featured a puzzle maze labeled "Help Jimmy the Tribble find its way back to Iota Geminorium IV", including a depiction of the planet. [1]
The "comparative xenobiology" okudagram used the spelling "Geminorium", though it wasn't legible on screen.
According to Stellar Cartography: The Starfleet Reference Library, a map of the Klingon Empire, which was prepared by the Scribe K'Tark for the Klingon High Council in the Year of Kahless 893 (2366), identified Tribble Prime as a Klingon planet.

External link