Oran'taku was an inhabited planet, and the homeworld of a a humanoid species, located in the Delphic Expanse about one half light year from the Xanthan homeworld.

Rajiin claimed to have been born on Oran'taku. She was later kidnapped and sold into slavery. In 2153, Jonathan Archer promised to try and locate the planet, and, if possible, return her to it. (ENT: "Rajiin")

This planet was only mentioned in dialogue.