Eta Cassiopeia

Eta Cassiopeia (sometimes also referred to as Eta Cassiopeiae or Achird) is a binary star system located around 20 light-years from the Sol system. It was orbited by at least three planets, one of which became a Human colony in the late 21st century.

In 2087, the Terra Nova colony was established on the third planet of the system by Humans, in an attempt to prove that Humans could actually establish a colony in deep space. In 2178, the system became a member of the United Federation of Planets. (ENT episode: "Terra Nova" and ST reference: Star Charts)

During 2277, in the mirror universe, Grand Admiral Matthew Decker assembled a task force in this system in the hopes of ambushing the ISS Enterprise and killing Admiral Spock. However, mutinies aboard the starships loyal to Decker meant that Spock was able to seize control of the fleet and declare himself the Grand Admiral of the Imperial Starfleet in Decker's place. (TOS - Glass Empires novel: The Sorrows of Empire)

System

Eta Cassiopeia (primaries)
- Eta Cassiopeia I
- Eta Cassiopeia II
- Terra Nova (Eta Cassiopeia III)
  - Terra Nova colony

Appendices

Connections

Template:Cassiopeia constellation

Alpha and Beta Quadrant stars and star systems (E)
Ebion • Ebor Tor • Eclosionatu's Depths • Edara • Edela • Ederlyn's End • Edjara • Edmora • Edora • Edrin • Edris • Edvaran • Egara 172 • Eisenhower • Eivox • Eizeb • Ekinus • Ekkoran • El Adrel • Elamin • Elamra • Elba • Eldara • Electri • Elex • Elgard • Elkauron • Ellion • Ellison's Star • Elnon • Elohim • Elona • Elsk'veth • Elthan • Elvada • Elven • Elvros • Elysia Incendae • Elzan • Elzbar • Elzibar • Emben • Emila • Eminiar • Emkaid • Emmeline's Gate • Emrana • Em'vara • Emvatra • Endicor • Endless Maw • Endra • Enkoth • Enoch • Enori • Enra • Entera • Entrunar • Eofaran • Eojur • Ephrata • Epsilon 119 • Epsilon Anubis (Epsilon Anubis A • Epsilon Anubis B) • Epsilon Ballara • Epsilon Beta • Epsilon Ceti • Epsilon Delta • Epsilon Fornacis • Epsilon Ionis • Epsilon Kitaj • Epsilon Lyra • Epsilon Minora • Epsilon Miranda • Epsilon Sierra • Epsilon Sorona • Epsilon Tauri • Epsilon Theta • Epsilon Ursae Majoris • Epsion • Equess • Eramor • Ercola • Erdor • Ereb • Erela Daraan • Eremar • Ergol • Erivek • Erkia • Er'vadi • Ervik • Esabl • Escor • Esinda • Eskiis • Essai • Ess'vara • Estasi • Esto • Estrada • Estron • Estrona Daraan • Eta Seratorn • Eta Tauri • Eta Trianguli • Eth'bernek • Eth'daja • Eth'fera • Eth'kaba • Eth'kina • Eth'mola • Eth'silva • Eth'teo • Eth'vara • Etla • Evadex • Evara • Evek • Excalbia • Exona Daraan • Exor • Eye of Gabriel • Eye of Helia • Ezani
Alpha Quadrant stars and systems (E)	Edasich • El Nath • Elasi Prime • Eltanin • Ennar • Entelior • Epsilon Aurigae • Epsilon Boötis • Epsilon Cygni • Epsilon Draconis • Epsilon Ophiuchi • Epsilon Serpentis • Eta Cassiopeiae • Eta Coronae Borealis • Eta Draconis • Eta Lyrae • Eta Ophiuchi • Eta Serpentis • Eta Ursae Majoris • Exo • Eye of Ket-Cheleb
Beta Quadrant stars and systems (E)	Eden • Edinov • Eisn • Ejul Thelni • Epsilon • Epsilon Canaris • Epsilon Canis Majoris • Edren • Epsilon Carinae • Epsilon Corvi • Epsilon Eridani • Epsilon Geminorum • Epsilon Gruis • Epsilon Hydrae • Epsilon Indi (Andoria) • Epsilon Librae • Epsilon Monocerotis • Epsilon Orionis • Epsilon Pavonis • Epsilon Phoenicis • Epsilon Scorpii • Epsilon Virginis • Eta Antliae • Eta Canaris / Eta Canis Majoris • Eta Corvi • Eta Crucis • Eta Eridani • Eta Horologii • Eta Indi • Eta Lupi • Eta Scorpii • Eta Virginis • Eye of Grun

Alpha and Beta Quadrant stars and star systems (A)
Aalad • Aarak • Aarra • Abakir • Abalma • Abassa • Abdadi • Abel • Aberriz • Abessia • Aboira • Abraxas • Abrena • Abrora • Abrox • Ab'vek • Abyss Alpha • Accellus • Achillon • Aciben • Adigeon • Adonolo • Adra • Ad'reth • Adrian's Bane • Ad'veth • Aecupus • Aeon • Aerie • Aerimea • Aesa • Aesir • Aesuri • Aetisan • Aexix • Afebra • Aferva • Aflor • Afritalis • Agbar • Agiirrat • Agrico • Ahadi • Ahzdar • Aia'vadi • Ailig • Ain • Ainaro • Aindia • Ain'Tok • Airola • Aiti • Ajora • Akemora • Akers • Akiren • Alabaster • Alacti • Aladfar • Aladso • Alak • Alamedus • Alannah • Alaris • Alastor • Alatum • Alcyone • Alderam • Alderamin • Aldhan • Alela • Aleph • Alera • Alexisian • Aleyda • Alfas Ducat • Alfin-Bernard • Alfirk • Alfor • Alfr • Algerida • Algeron • Alila • Alioth • Alkalurops • Alkuk • Allendon • Almedo • Almeisan • Almekan • Alnath • Alnitak • Alonso • Alorina • Alpha Aldiss • Alpha Arietis • Alpha Ataru • Alpha Baratis • Alpha Coranda • Alpha Darwin • Alpha Demetrius • Alpha Emori • Alpha Epsilon Tauri • Alpha Equulei • Alpha Feronis • Alpha Helios • Alpha Honorus • Alpha Hydros • Alpha Imvori • Alpha Is'tek • Alpha Kiriki • Alpha Kratonii • Alpha Leporis • Alpha Min'roth • Alpha Maluria • Alpha Marak 272 • Alpha Narnia • Alpha Nemvadi • Alpha Nexus • Alpha Nimorra • Alpha Omicron • Alpha Orionis • Alpha Ortelina • Alpha Parnaculon • Alpha Persei • Alpha Quarram • Alpha Sarpeidon • Alpha Shiro • Alpha Sigma • Alpha Tau • Alpha Tel'reth • Alpha Tenori • Alpha Theta • Alpha Trimora • Alpha Varangis • Alpha Vegetis • Alpha Vergoris • Alpha Xaridian • Alphax • Alsafi • Altamid • Altanea • Altanis Idrilon • Altar • Althos • Altor • Aludra • Alula • Alvaradi • Alvarka • Alya • Alycen • Ama Daraan • Amal • Amana • Amboris • Ambrose's Star • Amebis • Amelda • Ami Bera • Ammdon • Amon • Ampok • Ampolis • Amstar • Amvada • An Daraan • Anaxa • Anaxar • Andra • Andrade Abyss • Andrea • Andrek • Androcus • Anelda • Anezira • Ankaa • Anki • Angosia • Annobon • Anrak • Anreta • Antas • Antede • Antiacus • Antide • Antigone • Antilios • Antipathy • Antonehk • Antos Veria • Antros • Anzibar • Aparcha • Aphir'keth • Apnira • Aprilia • Apyra • Aquila Scorpi • Ar Daraan • Arachnae • Arada • Arak • Aralan • Arali • Arara • Arb'sa • Arbutus • Arcadia • Arcan-Beta • Arcanis Majoris • Archernar • Archibald • Ardaji • Ardan • Ardana • Aretian • Argentomea • Argez • Argona • Arhennius • Aria • Ariax • Arianna • Aridanes • Aridia • Arkab • Arken • Arkto • Arloff • Armus • Arnab • Arneb • Arnebius • Arnos • Arori • Aroven • Arrakis • Artaleirh • Artemis • Arvada • Asara • Aseara • Asellus • Ashgrave • Ashira • Asiti Alpha • Asiti Beta • Askalifex's Sorrow • Askalon • Asmidiske • Asneth • Asta Daraan • Astamante • Astarea • Asterope • Astra Bel • Astra Bora • Astra Enda • Astra Fara • Astra Imra • Astra Ina • Astra Jelra • Astra Jora • Astra Kalda • Astra Kol • Astra Lera • Astra Melva • Astra Menta • Astra Nor • Astra Pevra • Astra Rendra • Astra Veldra • Astra Vin • Astra Yara • Astra Yera • Astrida • Atabis • Atalia • Atalis • Atana Daraan • Atarvi • Atlas • Atria • Atrius • Atropira • Atryn • 'aucdet • Augustus Gamma • Aumoide Pore • Auva • Avery • Avan • Avek • Av'tel • AX Arae • Axelot • Axtox • Ayela • Ayin Aleph • Aylus Alpha • Aylus Beta • Ayta • Ayvren • Azati Prime • Azedis • Azentra • Azinda
Alpha Quadrant stars and systems (A)	Aaamazzara • Abilakk Alpha • Abilakk Beta • Achird • Actrium • Adhil • Adia Alpha • Adia Beta • Aegis Aquila • Ajir • Al Nath • Alam'ak system (Alam'ak) • Albireo • Alcor • Aldhibain • Alferaz (Alferaz A • Alferaz B) • Algol • Alkaid • Almach • Almatha • Alpha Andromedae (Alpha Andromedae A • Alpha Andromedae B) • Alpha Aquarii • Alpha Aquilae • Alpha Aurigae • Alpha Boötis • Alpha Canum Venaticorum • Alpha Camus • Alpha Coronae Borealis • Alpha Cygni • Alpha Majoris • Alpha Ophiuchi • Alpha Proxima • Alpha Trianguli • Alpha Ursae Majoris • Alpha Zaria • Alpha-1 Andromedae • Alpha-2 Andromedae • Alphecca • Alpheratz • Altair • Amleth • Ancha • Andromeda • Ankaro • Antica • Antos • Anzat Alpha • Anzat Beta • Aokii • Aquila • Arawath • Arbazan • Archaria • Arcturus • Arduria • Argaya • Argus • Arteline • Ascella • Atair • Atik • Aurelia • Avenal
Beta Quadrant stars and systems (A)	Acamar • Achernar • Acrux • Acubens • Adara • Adelphous • Adhafera • Adhara • Aelas • Agena • Agornu • Agurtha • Ajilon • Akaali • Al Nair • Alchibah • Aldebaran • Algorab • Alhena • Alkes • Alnilam • Alpha-2 Centauri • Alpha Cancri • Alpha Canis Minoris • Alpha Canis Majoris (Alpha Canis Majoris A • Alpha Canis Majoris B) • Alpha Carinae • Alpha Centauri (Alpha Centauri A • Alpha Centauri B • Alpha Centauri C) • Alpha Chamaeleonis • Alpha Circini • Alpha Comae Berenices • Alpha Corvi • Alpha Crucis • Alpha Cygni • Alpha Eridani • Alpha Geminorum • Alpha Gruis • Alpha Hydri • Alpha Leonis • Alpha Mensa • Alpha Monocerotis • Alpha Onias • Alpha Pictoris • Alpha Prime • Alpha Scorpii • Alpha Virginis • Alpha Volantis • Alpha Zeta • Alphard • Alshemali • Alterf • Alungis • Amar • Amargosa • Amirii • Andoria • Angel • Antares • Archanis • Archer • Argelius • Argelius B • Arided • Avior • Axanar • Azha • Azraga

Background

In ST video game: Starfleet Command III gameplay, the system name of Achird was part of a list that were applied to systems on the game map, with random attributes assigned to them.

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