The Cyrannus Star Cluster

The Twelve Colonies of Kobol are twelve distinct worlds located in Cyrannus Star System. A map, which this game employs, is available here for free download, or players can click on the image below to enlarge it.

CyrannusMap.jpg

About 2,000 years prior to the Cylon Holocaust, the Twelve Tribes of Kobol left their home planet after conflicts with their gods led to some sort of calamity only hinted at in religious texts. Having settled on Cyrannus System planets, the early Colonies lived (and fought) more or less as sovereign states. Some (like Caprica and Virgon) prospered; others (like Sagittaron and Aerilon) did not. Two millennia of inter-Colonial tensions and warfare finally came to an end nearly one hundred years ago: after joining together to resist the Cylon rebellion, the various independent governments agreed to unify as a federal republic, formalizing the so-called Articles of Colonization signed during the middle of the war.

Helios Alpha

Helios Alpha is a main sequence star of spectral class G2V and has a mass of 1.0, and was the first system settled by the Colonials after the exodus from Kobol, having first set foot on Gemenon. It shares its orbit with Helios Beta at a distance of 63 SU. The pair complete an orbit once every 373 years.

  • Planets and Other Astronomical Bodies
    • Icarus — A small planet located close to the star. It has a molten surface which makes mining and exploration impossible.
    • Picon
    • Caprica and Gemenon — These two colonies are twin planets.
    • Erebos Asteroid Belt — This belt has been actively mined for minerals.
    • Tauron — One of only three colonies to feature a moon, named Minos, and it is the only moon with a ring. It was home to several mining and scientific outposts.
    • Zeus — A gas giant located at the outer edge of the system. This gas giant is the largest planet in the four systems, with a diameter of 153,000 km at the equator. The planet has 74 moons, the largest of which are Nike and Hebe. Constant upper atmosphere lightning creates an aurora effect that can be seen with the naked eye.
    • Persephone — Classified as a dwarf planet, Persephone is the last planet in the system and features an inclined and eccentric orbit. Colonial scientists believe this planet could be an escaped moon of Zeus. It had a small Naval Station in orbit that was used as an emergency fuel station. It was manned and defended by fighter defense stations to prevent piracy traffic.

This system is unique in the fact that Caprica and Gemenon share an orbit around a common barycenter. According to the Colonial map, the planets orbit each other once every 28.2 days, and are separated by a distance of 493,000 km.

Helios Beta

Helios Beta is a main sequence star of spectral class G2V and has a mass of 0.79. It is the second system settled by the Colonials after the exodus from Kobol. It shares its orbit with Helios Alpha at a distance of 63 SU. The pair complete an orbit once every 373 years.

  • Planets and Other Astronomical Bodies
    • Troy — A small, metal-rich planet, mined extensively by Virgon and Leonis since the founding of those two colonies.
    • Leonis
    • Ouranos Asteroid Belt — Originally an iron- and copper-core planet destroyed some 90 million years prior, this feature was fought over extensively by Leonis and Virgon, both laying large minefields in this nigh-impossible to navigate belt. It is a posted No Fly Zone.
    • Virgon — One of only three colonies to feature a moon, named Hibernia, and the only naturally habitable moon in the 12 Colonies. It was settled several centuries ago by the Celtans, an ethnic group opposed to Virgon rule.
    • Hera — A gas giant, approximately 75,000 km in diameter, and the third largest planet in the Cyrannus system. It has 29 moons, the largest of what are Iris and Eubora.
    • Pallas — A small world with an inclined orbit once believed to hold a life sustaining atmosphere. It is no longer tectonically active. However, the Colonials did set up at least seven small colonies and a military research station on the planet. Efforts to kobolform (terraform) the planet have failed.

Helios Gamma

Helios Gamma is a main sequence star of spectral class G9V and has a mass of 0.89. It is presumably the third system settled by the Colonials. Helios Gamma shares its orbit with Helios Delta at a distance of 70 SU, and completes an orbit once every 456 years.

  • Planets and Other Astronomical Bodies
    • Thanatos — A small planet with a corrosive 'sulphur' dioxide atmosphere. This planet is tidally locked to the star, and aptly named for the god of death.
    • Acheron Asteroid Belt — Much like the belt in Helios Beta, this has been mined extensively along the edges and holds almost nothing left of value where it is accessible. Navigation is extremely treacherous on the interior due to gas clouds and residual metals destroying DRADIS returns. It is a posted No Fly Zone.
    • Scorpia — Previously home to the Scorpion Fleet ship yards. The planet features a half ring, thought to be a moon that broke apart nearly 100,000 years ago.
    • Sagittaron
    • Libran — Features two small moons, Herse and Pandrossos, which are thought to be captured asteroids. The moons orbit so close to each other, they periodically swap positions.
    • Ophion — A frigid gas giant with diameter of 51,000 km, and an inclined orbit. The planet has 14 moons, all smaller than 10 km in diameter. Studies on the planet have Colonial scientists thinking that Ragnar was originally a member of the Helios Gamma system, while Ophion was not. Scientists think that Ophion was a rouge planet that passed close to Ragnar and was caught by the star, pushing Ragnar into its current orbit around the entire Gamma/Delta system.

Helios Delta

Helios Delta is a reddish main sequence star of the spectral class K2V and has a mass of 0.74. It is the last of the four systems to be settled by the Colonials. Helios Delta shares its orbit with Helios Gamma at a distance of 70 SU, and completes an orbit once every 456 years.

  • Planets and Other Astronomical Bodies
    • Phoebe — A small world with a high surface temperature and thin atmosphere.
    • Aeolus Asteroid Belt — Extremely stable but a depleted resource.
    • Aerilon, Hestia, and Canceron — These planets share the same orbit.
    • Hestia — The smallest gas giant in the Cyrannian star system, Hestia only has a diameter of 47,000 km. It has 17 moons, the largest of which, Kronos and Rhea, share the same orbit.
    • Aquaria
    • Styx — A small planet, with a dense, reducing atmosphere of carbon dioxide, and sulfides.

This system is unique in the fact that Aerilon, Hestia, and Canceron share the same orbit. The planets sit comfortably in Lagrangian Points, meaning that the gravitational pull of Helios Delta and Hestia are balanced, allowing two smaller bodies (Aerilon and Canceron) to share the same orbit in a "fixed" position, maintaining the same distance apart at all times. Aerilon sits at the L4 point, and Canceron at the L5 point.

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