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Osadj is a single main-sequence star system located in the Xarantine sector, Beta Quadrant, of the Milky Way galaxy.


The system has at least three planets, with Osadj III, a large class J gas giant, having at least one class M moon with a temperate climate, a large ocean and several land masses with rolling hills and open plains covered in low vegetation and a stable ecological system, Osadj Prime. There is one sentient humanoid species native to this moon, called the Osadjani.

Other planets in the system include a rocky class D planet and a medium-sized class J gas giant.

There is one sentient species native to the moon, called the Osadjani. (TOS novel: Starfleet: Year One)


The Osadj system was first discovered by the Federation in the year 2187 when the USS Jacksonville encountered an Osadjian freighter in the Beta Quadrant. (TOS novel: Starfleet: Year One)



Alpha and Beta Quadrant stars and star systems (O)
OblikObyOccultOchsOctifOdalOdibOhniakaOhopOlassaOlioOltionOmegaOmega Corvus • Omega Cygni (Cygnet, Maluria) • Omega DraconisOmega MaelstromOmicron IndiOmicron PascalOneliaOomaru system (Oomaru) • OphiucusOplaOrda-877OrdoverOriens DeltaOrsaOsinar Alphabetasym
Alpha Quadrant stars and systems (O) OlmerakOmega AurigaeOmega PisciumOmega SagittaOmega SagittariiOmicron DraconisOmicron PerseiOrelliusOriasOsadj AlphaQuadrant
Beta Quadrant stars and systems (O) OgatOmega FornacisOmicron CetiOmicron EridaniOmicron GruisOmicron Leonis • Omicron Eridani (Omicron-1 EridaniOmicron-2 Eridani: Omicron-2 Eridani A, Omicron-2 Eridani B, Omicron-2 Eridani C) • OracoOrgania systemOrionOssecOtha Prime BetaQuadrant


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