Argelius II (known as Nelphia to its inhabitants) was a Class M Federation planet located in the Tau Ceti quadrant, orbiting the star Rho Magnin (Argelius B) in the Ciatella star system. It is home to the Argelians.


In the early 11th century, intense planetary conflict raged on Argelius, which nearly resulted in the annihilation of all life on the planet. Slowly, the Argelians began to recognize the danger of their actions and began to turn to a life of peace. However, this was a very slow process and the "Great Awakening" of the Argelians did not occur until the late 21st century, specifically 2067. (ST reference: The Worlds of the Federation, Last Unicorn RPG module: All Our Yesterdays: The Time Travel Sourcebook)

As the Argelians began to rebuild their world and their society, Argelius began to look like a paradise. By the late 22nd century, Argelius began to attract visitors from all over the Alpha and Beta Quadrants, with its most frequent visitors being from the Federation. In 2230, Argelius joined the Federation and became an important space port. (ST reference: Star Trek Maps)

Sometime in the early 23rd century, Argelius underwent a planetwide cataclysm in which the genetic code of many of the planet's species began to breakdown and experience runaway mutations. The northern continent retained some semblance of civilisation, but the southern continent was devastated. Dr. Philip Boyce was assigned to help fix the ecosystem, spending seventeen years on the planet. Here, he met and later adopted a young girl named Jaya. (TOS novel: The Children of Kings)

By the 2250s and 2260s, Argelius was a popular shore leave destination for Starfleet officers, given its varieties of bars and casinos, as well as the excellent weather and friendly culture. (TOS episode: "Wolf in the Fold"; TOS novel: The Klingon Gambit; TOS video game: Starfleet Academy: Strategic Command)

In 2267, several murders were committed on Argelius, including the Prefect's wife. Although Lieutenant Commander Montgomery Scott of the USS Enterprise was implicated in the murders, it was later revealed to be the entity known as Redjac, who had assumed control of Chief Investigator Hengist. (TOS episode: "Wolf in the Fold")

In 2281, Starfleet's Special Section put out the rumor that Montgomery Scott was on mandatory rest leave after getting into a brawl on Argelius. (TOS novel: Dwellers in the Crucible)

By the late 23rd century, there was an Orion Colony on Argelius, marking their deepest expansion into the Federation at the time. (FASA RPG module: The Orions: Book of Deep Knowledge)

Despite the trouble he encountered in his first visit, Scott continued to enjoy visiting Argelius. Shortly after his revival in the 24th century, Scott compared the quarters given to him when rescued by the USS Enterprise-D to a hotel he stayed in on the planet. (TNG novelization: Relics) Shorty after, Scott had an extended stay on Argelius II, where Lieutenant Commander Burgoyne of the USS Excalibur accused him of trying to hide from the rest of the universe. Burgoyne finally convinced Scott to leave Argelius II, but not before Scott beat hir in a Scotch drinking contest. (NF novel: The Two-Front War)

Argelius banned casino gambling sometime in the early 24th century, concluding that it contributed to violence. (SCE short story: "An Easy Fast")

Flora and faunaEdit

Glanthor live in burrows in wooded areas of Argelius II. (SCE short story: "An Easy Fast")

Mirror universeEdit

In the mirror universe, Montgomery Scott of the ISS Enterprise was accused of the brutal murders of three women on Argelius II in 2267. However, Captain James T. Kirk ensured that the charges disappeared almost immediately. (TOS - Mirror Universe novel: The Sorrows of Empire)


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
planets visited by ships named Excalibur
USS Excalibur (2240s) Donatu V
USS Excalibur (NCC-1664) Velarrh VIILinyar IIAltair VINeural IIIPriatiaArgelius II
USS Excalibur (NCC-26517) Vigan Delta VLintar IVArgelius IINelkarThallonZondarAhmistaHareshEnevNarobi IIFennar
USS Excalibur (NCC-26517-A) Priatia

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