Sigma Iotia II, also known as Iotia and Oxmyx, was the second planet of the Sigma Iotia star system, located in Federation space in the Beta Quadrant. It was the homeworld of a humanoid race called the Iotians. (ST reference: The Worlds of the Federation, Decipher RPG module: Worlds)

The FASA RPG module: The Federation names the planet "Iotia" and makes it the fourth planet, though this contradicts the TOS episode: "A Piece of the Action". The ST reference: The Worlds of the Federation also names the planet "Iotia" but also gives it the local name "Oxmyx"; the relation of this to Bela Oxmyx is unknown.


The capital of Iotia was Chicago, a close copy of the real city of Chicago of Earth in 1928. Rather than a lake, it sat beside an ocean, on a river that was much wider than the Chicago River of Earth. The streets and buildings were as accurate as possible, though Iotians who visited the real Chicago tended to be disappointed. Every major clan had possession of at least one ward in Iotian Chicago.

Due to Iotia's extreme weather and common earthquakes, few Iotian cities survived for more than a century or two without suffering a major fire or earthquake. (Decipher RPG module: Worlds)

The two largest nations were Northside Territory and Southside Territory, corresponding to the northern and southern parts of the continent of Ekal, respectively.

Alproth OceanAralak OceanEgaph (Anthur MountainsDraken RangeTronlaVornak) • Ekal (ChicagoCresmyxEkoraKronoRicalTranfel MountainsVarelk Mountains) • Gelron SeaLandek (Tash MountainsYolter) • Prothan SeaStranek SeaUil (ArvielJyorna MountainsKorekLanster)


Iotia had no particular resources, though Iotian smugglers spread their weapons and bootleg liquor to other, nearby primitive worlds. Iotian smugglers and forgers had a good trade importing genuine and "genuine" Chicago-style manhole covers, building cornices and other bits of architecture from the real article. (Decipher RPG module: Worlds) Businesses on Iotia included Chamey's Auto Repair and Economy Bus Lines. Bang Bang was a brand of "heater", said to be the "sweetest little automatic in the world". (TOS episode: "A Piece of the Action")

Iotian crystal was a product of Iotia. (TOS novel: Death Count).

In the late 23rd century, the planet had a technological/sociopolitical index of 556675-78 and a planetary trade profile of CBDEECC/C(C). It was a trade center by reference stardate 2/2306.1 (circa 2287) (FASA RPG module: The Federation).

The FASA RPG module: The Federation gives Iotia a population of 4.7 billion people as of stardate 2/2306.1 (circa 2287). The Decipher RPG module: Worlds, meanwhile, states a much smaller population of some 900 million by the late 24th century.


Sigma Iotia II map

A map of Sigma Iotia II

Iotia was a very Earth-like Class M planet with one large moon at a medium distance. It had a standard nitrogen-oxygen terrestrial atmosphere and a cool-to-temperate terrestrial climate. (FASA RPG module: The Federation, Decipher RPG module: Worlds) However, its star had a higher radiation output, and the planet had a faster rotational period and smaller oceans that led to a greater contrast between wet and dry air. As a result, the planet had more extreme weather and it was high tectonic activity; fires and earthquakes were a common occurrence. (Decipher RPG module: Worlds)
The Federation says the Iotian day is 25 hours long, while Worlds says 19 hours, but divided into a 24-hour system. The two sources also give different maps for the planet.

The planet had four major continents – Ekal, Egaph, Landek and Uil – and two minor ice-capped poles. The first three continents sat in the temperate zone, while Uil was tropical and rich in resources. (Decipher RPG module: Worlds)

It had a total surface area of 400,000,000 square kilometers and, with 60% land mass, a total land area of 240,000,000 square kilometers (FASA RPG module: The Federation). It had 65% hydrosphere (Decipher RPG module: Worlds). About 22% of its makeup was normal metals and 8% was radioactive elements, while it had only trace amounts of gemstones, special minerals and industrial crystals. (FASA RPG module: The Federation) It had a gravity close to that of Earth.

The Federation gives Iotia a gravity of 1.1 g, while Worlds gives it a gravity of 0.9 g.


planets visited by the USS Enterprise (NCC-1701) during Captain Kirk's initial five-year mission (2265-2270)
various Aprilia IIICaporyGarrus
2265 EarthDraxis IITallyAlpha Ortelina VIIArronus VIIAldebaran IIIM-155MestikoDimorusTendarArchernar IVDelta Vega IMiri's homeworldStarbase 127348-IIrobot planetTimshelK-GZartaMetamorphaNumero UnoMortiInicrustVoodoo planetGamma Alpha VStarbase 8 planetPollux IIDukarNeesanAlgenib II
2266 Beta IVRigel XIIPsi 2000Tlaoli IVAlpha Proxima IIAngiraBeta CarinaeExo III1324-IVCanaraNadorM-113Alfa 177Planet QBeneciaYkoTheta VII (Rell's world)Talos IVNumero UnoGateway
2267 Makus IIIBeta VIJanus VIOmicron Ceti IIIDenevaCeti Alpha VEminiar VIIBabelGamma Canaris 527Taurus IIHydra Epsilon IIIXimega IIPerseus Arm planetoidYkoSalvumGrotusRifas-LAmusement Park planetHeitius VIICentaurus VTyrtaeus IIGothosCestus IIINisusIron-silica planetZutotanium planetoidMuddEarthCanaraBeta IIIPyris VIIVulcanGamma XaridianPollux IVArgelius IIHalkaBavaryaNeolithiaMythraCapella IVGamma 400Magna RomaGamma Trianguli VISigma Iotia IIMasabaLekythosTyrtaeus IIShroud IVTycho IVDonico IIRimilliaOrgania
2268 Narnel's WorldNeuralAlpha Malurian VIBeta Canzadia IIIFornax IIGamma IITriskelionArgus XTycho IVTheta VIISigni BetaEarthPegasus IVCareta VDireidiEeiauoPatria IExo IIIT'nufoTranquility VIILeora IVAcademyDelta Canaris IVTautee star systemAmmdonMarcos XIIOctavius IVBeta CabriniAmerindBeta XII-AElasTroyiusSigma Draconis VIEkosScalosGideonBrellian IVPrastorDistrel
2269 MercanAnomalyEdenHolberg 917GSarpeidonExcalbiaAndrosPollux VAvalonCamus IIAragosTanisAleph PrimeKyrosBeta CastelliHeloxUnnamed Hoshan planetsChrellkan IIIChrellkan IVVidenDengella IIAlnath IISanctuaryMemory PrimeEphrata IVGelladorn/R-775 IVelat Nol/R-836 IITheta Tau VTalin IVAleph IIIBoaco VITrefolgMantillesMerak IIArdanaBabelOrganiaGatewayMaltos IV
2270 Isitra ZeroGatewayMercanDenebiaPhylos IIBeta Omicron Delta IIIMotherlodeMegas-TuTerratinSherman's PlanetArgoVedala asteroidDramia IIArretLactra VIIDelta Theta IIIArchernar IVCenotaphTaygeta VOkeanosElcidar Beta IIIYoondriAleriadAritaniYalboSycoraxTalos IVPillagra/R-855 IIIR-855EarthStarbase 12Tomarii

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