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The Hromi Cluster in 2409.

The Hromi Cluster was a region of space in the Xarantine and Hromi sectors of the Pi Canis sector block in the Beta Quadrant, near the Acamar system containing a number of Class M planets. Parts of the area had been charted by the Federation. (TNG episode: "The Vengeance Factor", STO mission: "Explore the Hromi Cluster")


2256 Beta Quadrant star chart showing Hromi Cluster.

In 2300, Elias Vaughn investigated communications from smugglers operating in the Hromi Cluster. (ST novel: Cast No Shadow)

In 2366, the USS Enterprise-D entered the Hromi Cluster to locate a Gatherer camp. (TNG episode: "The Vengeance Factor")

Morjod claimed to have made all his wealth in the Hromi Cluster, through Klingon-owned mining concerns. In fact, it was controlled by Ferengi and Orion concerns, most of them illegal. As Kahless pointed out, due to the Klingon belief that discussing commerce was distasteful, very few Klingons would know be aware of Morjod's falsehood. (DS9 - The Left Hand of Destiny novel: Book Two)

In 2404, following their conquering of the Gorn Hegemony, the Klingon Empire demanded that all Federation citizens vacate the cluster immediately and invoked ancient territorial rights that the cluster was their property. Federation President Aennik Okeg refused the ultimatum point-blank on stardate 82001.36 in 2405, stating that "current possession counts for something," and three days later the Klingons began an ethnic cleansing attempt on Korvat. Starfleet retaliated, opening the Federation-Klingon War of 2405-2410. (STO website: The Path to 2409)

In 2409, Lieutenant Grall was responsible for Starfleet exploration missions to the Hromi Cluster. There were hundreds of unexplored planets. Some of these worlds required commodities such as shield generators, industrial energy cells and communication arrays. (STO missions: "Explore the Hromi Cluster", "Relief Effort")

Known planets[]



Pi Canis sector block
Hromi Cluster (Gamma Hromi, Gamma Hromi II)
Hromi sector Gateway (Alpha Zeta, UFC 465537) system (Gateway) • JFS47 system • Kalferi system (Kalferi II) • Korvat system (Korvat) • Maiewski system (Maiewski Prime) • Veyga (Eta Veyga) system (Veyga IV)
Mempa sector Beta Thoridor system (Beta Thoridor planet) • Ceron system • Da'Kel system (Da'Kel IDa'Kel II, GionDa'Kel III) • Eriksson system • H'atoria system (H'atoria) • Lilitu system • Mempa system (Mempa IIMempa IVMempa VMempa VIIMempa VIIIMempa IX) • M'rade system • Vesper system (Vesper II) • Vor system (Vor II)
Xarantine sector Danteri system (Danter) • Honod system • Kern system (Kern III) • Laurentian system • Seedea system • Trimble system (Trimble) • Xarantine system (Xarantine VI)
Star clusters and nebulae in Star Trek Online
Alpha Quadrant Betreka NebulaRolor NebulaZenas Expanse
Beta Quadrant Afehirr NebulaArucanis ArmAzlesa ExpanseAzure NebulaB'Tran ClusterBriar PatchCeles NebulaChoS NebulaD'kel Star ClusterDelta Volanis ClusterEridan BeltEridon NebulaGreat BloomHromi ClusterKahless ExpanseKhazan ClusterMutara NebulaPaulson NebulaT'Kanis NebulaT'Ong NebulaYan Nebula

External links[]