memory alpha

Epsilon Ceti B, sometimes simply refered to as Risa, was an F-type star in the Risa system, located in a sector of the Beta Quadrant.

The inhabited planet Risa orbited this star. (TNG: "Captain's Holiday"; DS9: "Let He Who Is Without Sin..."; DIS: "Magic to Make the Sanest Man Go Mad"; PIC: "Maps and Legends")

Epsilon Ceti B had a companion star, Epsilon Ceti A, which was also an F-type star.

History

When the Venari Ral laid Omega-47 mines around the core of Federation space in 3196, this star was within the enclosed region. (SA: "Rubincon")

Stellar cartography

Star Chart, 2259

Star Chart, 2259

The Risa system was visible from Earth in the constellation Cetus. It was approximately 93 light years from Sol.

In 2259, the location of Epison Ceti B (Risa) was labeled on a stellar cartography chart that was seen on the USS Enterprise's ready room viewscreen. This star's symbol had a blue color, indicating that it was affiliated with the United Federation of Planets. (SNW: "Strange New Worlds", "Children of the Comet", "Spock Amok")

On stardate 1292.4, the location of Epison Ceti B (Risa) was labeled on a star chart used during a Section 31 Alpha Team briefing. It was depicted as inside Federation space. (Star Trek: Section 31)

Epsilon Ceti B's location was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters in 2399 and on the bridge of the USS Titan-A in 2401. This star was in or near to Federation space. (PIC: "Maps and Legends", "The Next Generation", "Disengage")

Information on this system was derived from the episodes, the reference works Star Trek: Star Charts and Stellar Cartography: The Starfleet Reference Library, and real-world sources. The reference works were used extensively in the creation of star charts seen in Star Trek: Discovery, Star Trek: Picard, Star Trek: Strange New Worlds, Star Trek: Prodigy, and Star Trek: Lower Decks. The real-world information added to the article was current as of 2025.
The current location of Epsilon Ceti in the Beta Quadrant was based on the most recent star charts seen in Star Trek: Strange New Worlds and Star Trek: Section 31.

External links