Gamma Tauri IV was the uninhabited fourth planet in its star system. Located in the Alpha Quadrant, this system was near the Federation-Cardassian border. (TNG: "The Last Outpost"; DS9: "Tears of the Prophets", okudagram).

Prior to 2364, the Federation established an unmanned monitor outpost on this planet. In 2364, the images of a Ferengi D'Kora-class warship were captured on the outpost's automatic scanners as a T-9 energy converter was heisted by crew members of the starship. Alerted by the theft, the starship USS Enterprise-D was tasked with pursuing the warship by Starfleet. During negotiations with the Ferengi, DaiMon Tarr of the Ferengi claimed this system was in Ferengi territory, a claim dismissed by Captain Jean-Luc Picard of the Enterprise-D. Later, with the persuasion of the Portal, the Ferengi returned the converter to the Federation. (TNG: "The Last Outpost")

In 2374, the location of Gamma Tauri IV was labeled on a tactical map of the plan for the First Battle of Chin'toka. (DS9: "Tears of the Prophets", okudagram)

This planet's quadrant of origin is inferred based on the position of the Cardassian Union in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".
According to Star Trek: Star Charts (p. 37) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the primary of the Gamma Tauri system was a G-class star.

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