Memory Beta, non-canon Star Trek Wiki

A friendly reminder regarding spoilers! At present the expanded Trek universe is in a period of major upheaval with the finale of Year Five, the Coda miniseries and the continuations of Discovery, Picard and Lower Decks; and the premieres of Prodigy and Strange New Worlds, the advent of new eras in Star Trek Online gaming, as well as other post-55th Anniversary publications. Therefore, please be courteous to other users who may not be aware of current developments by using the {{spoiler}}, {{spoilers}} or {{majorspoiler}} tags when adding new information from sources less than six months old. Also, please do not include details in the summary bar when editing pages and do not anticipate making additions relating to sources not yet in release. 'Thank You


Memory Beta, non-canon Star Trek Wiki
This article or section needs attention
This page or section has been identified as needing attention. Please visit the article's talk page to see what needs fixing and feel free to edit this page to assist with this task..

Rigel X was the tenth planet of the Rigel system.

A few different versions of Rigel X have been given, and for clarity each is presented separately below.
Both Star Charts' Beta Rigel X and the Decipher RPG's moon Rigel XB, aka Kolhor, are intended to be the canon Rigel X seen several times in Star Trek: Enterprise, though differ in that one is a planet, the other a moon, one is a Federation member, the other neutral. By apparent coincidence, this version, particularly Decipher's, is similar in concept to the Rigel IV presented in FASA RPG module: The Orions: Book of Common Knowledge.
Though both are gas giants, FASA's Onot is a little smaller than Jupiter, so it likely is not the same as Decipher's double-Jupiter-sized Rigel X. FASA's Rigel X and its moons are the least similar to the canon version, hence they are placed last.

Decipher version

Rigel X, was the tenth planet of the Rigel system, in the Beta Quadrant. It was a Class J superjovian gas giant, twice the size of Jupiter. It emitted radiant heat. (Decipher RPG module: Worlds)


Rigel X was best known for its moon, Rigel XB, or Kolhor, which was often called simply "Rigel X" itself. Kolhor was a large Class H moon, with a gravity of 0.8 g. It was a cold desert world, 45% covered in water ice and snow, with a thin oxygenargon atmosphere. The radiant heat of Rigel X kept the moon just barely livable. (Decipher RPG module: Worlds, ENT novel: The Good That Men Do)

The ENT novel: The Good That Men Do has the planet Rigel X warmed by Rigel itself.

Nevertheless, Kolhor was home to some 2 million people from many species, and 100,000 Orions, including both permanent residents and itinerant traders, spies, mercenaries, and starship crews from many worlds (Decipher RPG module: Worlds, ENT novel: The Good That Men Do). They formed a cosmopolitan society based entirely around trade, and managed by a corporate government. Nearly all their activities took place indoors and underground, in Kolhor Station. (Decipher RPG module: Worlds) It was known as the "Rigel colony" to Starfleet in 2161. (ENT episode: "These Are the Voyages...")

Rigel XB was officially an independent and neutral world. (Decipher RPG module: Worlds)


Formerly an Orion research facility, Kolhor Station was founded during the Fourth Orion Empire some 30,000 years ago. Ever since, it has served as the primary trade entrepôt (a tax-free trading post and trade-route intermediary) of the Rigel system. Even the most ancient civilizations who'd forgotten their navigational data for the other worlds of Rigel still possessed complete records for Rigel XB. (Decipher RPG module: Worlds)

The very first Starfleet vessel to visit the Rigel system was the Enterprise (NX-01), when Captain Jonathan Archer tracked the Klingon Klaang and the Suliban Cabal to Rigel X in 2151 (ENT episode: "Broken Bow", Decipher RPG module: Worlds). It returned in 2155 with Shran to track Orion slavers that had kidnapped Aenar from Andoria (ENT novel: The Good That Men Do), and again in 2161 to find Shran's kidnapped daughter Talla (ENT episode: "These Are the Voyages..."). Since that time, Starfleet activity has only increased, both at Rigel X and in the rest of the Rigel system, but was never without incident.

The development of dilithium mining on Rigel XII brought increased profits to Kolhor.

It was still in business and unchanged in the late 24th century, even after the Dominion War, and remained neutral and independent. (Decipher RPG module: Worlds)


Kolhor Station, the Rigel Trade Complex

Kolhor Station covered approximately 400 square kilometers, and was situated on a libration point at which Rigel X was visible for 50% of the time, and unseen for the rest. The surface was mainly spacecraft landing docks and repair bays, while the rest of the station facilities were underground, going down for kilometers (Decipher RPG module: Worlds), with a commercial habitation complex 36 levels deep (ENT episode: "Broken Bow", ENT novel: The Good That Men Do). It included many individual trade entrepôts, supply bays, workshops, homes, and various forms of night-time entertainment. It was densely packed, and even natives could get lost if they got far out of their familiar areas (Decipher RPG module: Worlds). It also contained cold slum areas for the homeless and impoverished transients. There was also a slave market operated by the Orion Syndicate. (ENT novel: The Good That Men Do)

As well as the possibility of trade, Kolhor Station produced hydroponically grown food, water harvested from the ice, and a variety of other supplies and services to passing ships, along with decadent entertainment for R&R. Those on the station also mined and refined Helium-3 and antimatter from Rigel X's orbit, which they sold on. A defense grid dating back to the Fourth Orion Empire protected the world from most attacks bar the most extreme, while Rigel X's outermost position in the system and reduced gravity made navigation easy, thus making it an attractive place to trade. It was considered a gateway between the wider galaxy and the mysteries of Rigel. (Decipher RPG module: Worlds)


The world was also home to a species resembling a large fly and several colorful butterflies (ENT episode: "Broken Bow").

As Rigel XB has an oxygen–argon atmosphere in Worlds, it is possible that the argon atmosphere–dependent slug "Sluggo" from the ENT episode: "Fight or Flight", immediately following "Broken Bow", came from Rigel XB.


Aojet MountainsDartal MountainsIntovarr MountainsVrantik Mountains
Darjet Valley
Ice Fields
Drevik Ice FieldKeltiv Ice FieldTorivan Ice PlainVical Ice Straight

Star Charts version

Beta Rigel X was the tenth planet of the Beta Rigel star system, in the Beta Quadrant. It was a Class P planet. It had one moon.

It was a member of the United Rigel Colonies, an interplanetary political state consisting of it and Beta Rigel II, Beta Rigel IV, Beta Rigel V and Beta Rigel VI. This became a member of the United Federation of Planets in 2202.

Its capital was the Rigel Trade Complex.

Rigel X had a population of 35.9 million people, consisting mainly of humanoid Rigellians and many other species. (ST reference: Star Charts)

FASA version

Rigel X, also known as Onot, was the tenth planet of the Rigel system. It was a ringed Class A gas giant with 17 moons.

Like Rigel IX and Rigel XI, Onot was an impressive giant, the largest of the three, with rings and many moons around it. Many of these moons were home to automated mining facilities, while the largest supported small, drab, boring mining towns. These were corporation-owned, with access restricted.

Onot had a gravity of 3.7 g and a 10-hour day. It had a total surface area of 12,443,238,000 square kilometers. About 21% of its makeup was normal metals and 5% radioactive elements, with trace amounts of industrial crystals, gemstones and special minerals. (FASA RPG module: The Orions: Book of Common Knowledge)

External Links