Spoiler warning: Plot and/or ending details follow.
Eisn (also known as Ket-cheleb or Stelam Rom'lnz or 128 Trianguli) was a spectral class G9 white star, primary of the Romulan system. The Federation name for the star was Romulus. (TNG video game: Echoes from the Past)
This area contained the home planets of the Romulan Star Empire, Romulus and Remus, as well as the moons Pirek and Elvreng. The system had a secondary star which is known as Romulus B. (TOS - Rihannsu novels: My Enemy, My Ally, The Romulan Way)
During the final battle of the Romulan Civil War in the year 2276, the crews of the USS Enterprise and ChR Bloodwing created a link between Eisn and Sol to defeat an attempt by the Three to destroy the Sol system with a sunkiller bomb. Ael t'Rllaillieu said in a public address that this event permanently bound the two stars together and any future attempts on either star would likewise affect the other, though she was bluffing. (TOS - Rihannsu novel: The Empty Chair)
In the mid-2380s, the Romulan Empire discovered their star was going to supernova within a matter of years. They asked the Federation for assistance in evacuating the 900 million inhabitants of the system. In 2387, after the Attack on Mars by rogue synthetic organisms destroyed the 10,000 vessels constructed to evacuate the Romulans and Remans, the Federation withdrew their assistance. Later that year, Eisn went supernova, destroying Romulus, Remus, and the other planets.
In 2387, Eisn was destroyed with the rest of the system in the shockwave caused by the Hobus supernova. (ST comic: "Countdown"; TOS movie, novelization & comic adaptation: Star Trek; STO website: The Path to 2409)
There were at least seven planets in the system:
- Stelam Rom'lnz I: Aranusia
- Stelam Rom'lnz IIA: Rom'lasz (Romulus); class M, Romulan home world
- Stelam Rom'lnz IIB: Rav (Remus); class M, orbits Rom'lasz
- Stelam Rom'lnz III: S'latas
- Stelam Rom'lnz IV: D'lanam, literally "The Great Wonder"; a gas giant
- Stelam Rom'lnz V: Ulunam
- Stelam Rom'ln VI: Trijth (FASA RPG module: The Romulans (FASA))
- The Rihannsu novels state that the system contained six planets whilst FASA material indicates that there were seven but the latter only numbers six as Remus orbits Romulus.
|Stars, systems and objects of the constellations of Triangulum and Triangulum Australe|
|15 Trianguli • 113 Trianguli • 114 Trianguli • 123 Trianguli ~ 128 Trianguli (Romulus system) • 4408 Trianguli • 553 Trianguli • 658 Trianguli • 766 Trianguli • 872 Trianguli • Alpha Trianguli • Beta Trianguli • Eta Trianguli • Gamma Trianguli • Iota Trianguli • Phi Trianguli • RV Trianguli • Sigma-285 Trianguli • Triangulum Galaxy • Zeta Trianguli Australis|
|Stars, systems and objects of the Perseus constellation|
|139 Persei (Romulus system) • 218 Persei • 29 Persei • 44 Persei (Zeta Persei) • Alpha Persei • Beta Persei (Algol) • Iota Persei • Kappa Persei • Lambda Persei (Typerias) • Omicron Persei • Perseus Arm • Zeta Persei (44 Persei)|