The Rubicun system was an inhabited planetary system. Located near the Strnad system, this system contained the homeworld, named Rubicun III, of the Edo. Both systems were located in a star cluster.

The star cluster contained 3,006 planets that were suitable for colonization. This cluster was claimed by the Edo God, a powerful trans-dimensional being (or beings) worshiped by the Edo, the humanoid inhabitants of Rubicun III.

In 2364, the starship USS Enterprise-D became the first Federation starship to contact the inhabitants of this system. Captain Jean-Luc Picard was requesting shore leave rights for his crew on the planet. (TNG: "Justice")

According to, the system's primary was named Rubicun.
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