Theta Cygni (13 Cygni) is a star system, a trinary star visible from Earth in the constellation of Cygnus. There were at least twelve planets in the system, at least one of which had borne sapient life. (TOS episode: "Operation -- Annihilate!")

History and specifics[]

At some point between 2067 and 2165, blastoneuron neural parasites infected the population of twelfth planet Theta Cygni XII, causing the inhabitants to go extinct. (TOS episode: "Operation -- Annihilate!")

In 2165 a Tellarite freighter reported receiving a distress call from Theta Cygni XII. Starfleet dispatched the USS Essex to investigate. Captain Bryce Shumar reported to Admiral Jonathan Archer that the Essex had found all life on the planet had been destroyed by chemical and bacteriological warfare some time ago. Shumar informed Archer that as far as the Essex could determine the planet had suffered a wave of mass insanity, and that a number of ships had been launched prior to the destruction of all life on that world. Because Theta Cygni burned hot the crew did not have a reliable means of tracking where the ships had gone due to the interference generated by the star. (ENT - Rise of the Federation novel: Live by the Code)

Appendices[]

Connections[]

Stars, systems and objects of the Cygnus constellation
16 Cygni • 61 Cygni (Tellar) • Alpha Cygni (Deneb) • Beta Cygni (Albireo; Cygnia Minor) • Cygnus Reach • Delta Cygni (Delta Cygnus) • Gamma Cygnet region (Gamma Cygnet planetoid • Gamma Cygni (Sadr, 37 Cygni) • Tree of Life planetoid) • Cygnus system • Epsilon Cygni • Omega Cygni (Maluria • Cygnet) • Theta Cygni • Veil Nebula • Ylva Cygni • Cygnia Miros • Cygni Ora
Cygnus system	Cygnus system primary star: Cygnus III • Cygnus IV • Cygnus VII
Cygni system	Cygni system primary star: Cygni I • Cygni II • Cygni III

Alpha and Beta Quadrant stars and star systems (T)
Tabuk • Tagus • Tahniva 311 • Tajarhi • Takan • Takanarra • Takoi • Tak'vor • Taladi • Talar • Taldora • Talbot • Talgat • Tali • Tal'Ihnor Gates • Talin • Talitha • Tallus • Talna • Talon • Talora • Talquos • Tamaros • Tambor • Tampora • Tanar • Tanaris • Tania • Tandorian • Tantalus • Tantamon • Tanuga • Taoji • Taos • Taran • Tarana • Taranda • Tardal • Tareel • Tarett • Tarf • Tariax • Tarila • Taris Seti • Tarletus • Tarnak • Tarquolese • Tarsus • Tartana • Tartarus • Tasox • Tasus • Tau Beta • Tau Gamma • Tau Omega • Tau Serpentis • Tau Zeta • Taurean • Tauro-34 • Tautallus • Tautee • Taxak • Taygeta • Taz • Taziok • Tazior • T'Bor • T'Dakka • Te Awamutu • Technis • Tedara • Tejat • Tekian • Tekiel • Tek'reth • Telcosus • Telep • Tellion • Telora • Telum • Teluridian • Tem Daraan • Temaris • Temazi • Temir • Tenak • Tenara • Tendar • Tendarri • Tenekratus • Tenber • Teniira • Tenor • Tera Daraan • Tera Lara • Terana • Teranth • Terazon-X31 • Terba • Tereb • Terella • Terga • Terim • Terminimurus • Terof • Teron • Terratin • Terrellian • Tervek • Tervellion • Tessmata • Tesum • Teth'torva • Tevron • Tewa • Tezel-Oroko • Tezion • Thabit • Thalak • Thalia • Thallus • Thark-Morkol • Tharnos • Tharsis • Thasus • Thaxius • Theata Leonis • Thelonii system (Thelonii) • Theta • Theta 116 • Theta Anterial • Theta Bowles • Theta Cobrini • Theta Cygni • Theta Gamma • Theta Majoris • Theta Mariana • Theta Mees • Theta Pictoris • Theta Rill • Theta Tau • Thetalian • Thevos • Tholus • Thonolan • Thorian-V • Thoris Amarnis • Thranstor • Thrax • Thraz • Threllvia • Thrishia • Thuban • THX-1138 • Tia Daraan • Tiaren • Tib'vor • Tiba • Tibidex • Tierenios • Tifel • Tigan • Tikopai • Tiliul • Timonium • Timor • Timore • Timpek • Tim'pek • Tio'pek • Tir Kapov • Tira Daraan • Tirian • Tiros • Tir'tara • Titan • Titanias • Tithadi • Tizum • T'Kar • T'Lani • Tlaoli • T'lli Beta • T'Lor • TNC-5527 • Tokan • Tok'Bhul • Tolfor • Tolochon • Tolor • Toman • Tomb of Anikalistes • Tomira • Tomora • Toolian • Toothy Maw • Tor • Toradi • Torgu-Va • Toridex • Torin • Tor'ivara • Tor'ken • Torkor • Torob • Torona • Torrt • Tortuga • Torviir • Toska • Toziuz • Tozox • Tozron • T'Por • Trager • Trakliv • Tra'tara • Trab'neth • Trabian • Trablar • Trabox • Tramzon • Tran • Traxen • Trel Daraan • Treleb • Trelkis • Trendir • Trellisane-Sealon • Trennes • Tri-Betaline • Tri-Rho Nautica • Triaminus • Triangeles • Triangularis • Trieba • T'Rill • Trillby • Triminon • Trimir • Trinora • Trin'tara • Tripoli • Tro'vara • Tron Daraan • Trotor • Truai • Trunox • Truth's Bane • Truxtun • Tseen • Tsih • Tsugh Khaidnn • Tsze • Tufem • Tulan • Tulgana • Tuner • Turen • Turion • Turi'tara • Tur'vok • Turul • Tutakai system (Tutakai) • T'Vant • Twisting Maw • Twobin • Tyburn • Tycho • Tynt • Tyolo • Tyrelli • Tyrtaeus • Tyrus
Alpha Quadrant stars and systems (T)	Tagra • Talos • Tama/Tamar • Tammeron • Tarahong • Tarazed • Tarvo • Tasak • Tau Ceti • Tau Cygna • Tau Boötis • Taurus • Tegedaar • Tellar • Temecklia • Thalos • Therbia • Theta Aquarii • Theta Draconis • Theta Pegasi • TL-9139 • Tohvun • Tomed • Topin • Torman • Torros • Trelka • Triangulum • Trill • Trivas • Tyl • Tyra
Beta Quadrant stars and systems (T)	T'Acog • Talvath • Tarod • Tau Centauri • Tau Delta • Tau Lacertae • Tegmeni • Tellun • Teneebia • Tephrei • Terix • Tessen • Teutil • T'gha • Thalassa • Thallon • Theta Centauri • Theta Eridani • Theta Hydrae • Theta Indi • Theta Kiokis • Theta Leonis • Theta Pavonis • Tiburon • Tigelis • Tika • T'Met • Toh'kaht • T'ong • Toredar • Torek • Torna • Toron • Traelus • Tranome Sar • Trilith • Turkana • Ty'Gokor

References[]

• TOS episode: "Operation -- Annihilate!"
• ENT - Rise of the Federation novel: Live by the Code

External links[]

• Theta Cygni article at Wikipedia, the free encyclopedia.