Cleistra (world)

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This is a world-system under construction and is currently being input-programmed into the Traveller RPG Wiki.

Cleistra/Abidal (Halcyon 2716)
Classic Era (1115)
StarportE Frontier - no facilities
Size2 Small (3,200 km, 0.10g - 0.17g)
Atmosphere2 Vacuum (very thin - tainted)
Hydrographics2 Dry World 20%
Population0 Barren (0)
Government0 No Government structure
Law0 No Law
Tech Level0 Pre-Industrial (primitive)
See also UWP
System Details
Primary M8 V
Planetoid Belts 0
Gas Giants 0

Cleistra is a poor, barren world with no overt population, government, or law level.

Astrography and Planetology[edit]

This star system is detailed using the Fringian Variant System Description.

Monostellar System[edit]

Cleistra Monostellar System
Star Name Hierarchy Category Mass (Sol) Temp (K) Luminosity (Sol)

M8 V

Primary Main Sequence 0.244 1900 - 2500 0.003
Unit Diameter Min Distance Hab Zone Jump Shadow M-Drive Limit
AU 0.00224 0.00415 0.04 - 0.06 0.224 2.24
Orbit #  *  *  * 0 5

System Data[edit]

Sangax-Cleistra System[edit]

The primary is Sangax, a dim red main sequence star. It has a luminosity of 0.0025 Sols, a mass of 0.244 Sols and a diameter of 334,000 km. (I) Cleistra, designated the mainworld, and (II) an exotic atmosphere bigworld form the outer system. Neither world retains satellites.

  • The star experiences periodic flare activity.

Mainworld Data[edit]

(I) Cleistra[edit]

(I) Cleistra is designated the mainworld. It orbits Sangax at a mean distance of 0.18 AU (27 million km), it has an orbital period of 56 days 11 hours and a rotation period 49 days 16 hours. The axial tilt is 90 degrees: the world's northern pole points towards the star and it wobbles as it rotates. Cleistra has a diameter of 3,516 km, a density of 3.97 g/cm³, and a surface gravity of 0.2 G. Tidal stresses generated by Sangax heat the interior of the world and cause geological activity. Its atmosphere is rated as Very Thin, Tainted, with a mean surface pressure of 0.23 bar and a composition of 73% nitrogen (N2), 18% oxygen (O2), 7% carbon dioxide (CO2), 1% argon (Ar), and 1% water vapor (H2O), neon (Ne), and other trace gases. The taint is caused by the high percentage of atmospheric carbon dioxide and the relatively high levels of background radiation: emission rates exceed 2 rads per hour. Approximately 19% of the surface is covered in a crust of water-ice and frozen gases, though geologically active regions may have small areas of liquid water. Mean surface temperature: -158°C. Northern polar temperature: -62°C. The climate is rated as Very Cold and is static, with no seasonal changes during the local year. The atmosphere is extremely sluggish and minor weather systems, driven by the star, affect northern regions of the globe. Weather patterns closely match cycles within the star.

Mainworld geography and topography[edit]

Total surface area: 39.9 million km², Land surface area: 32.3 million km², Ice coverage: 7.6 million km². The Everdark mountains dominate the southern hemisphere and extend to the equator. The rugged northern temperate zone, called the Dawnlands, is marked by the Murtaugh Depression. It is formed by five huge, shallow impact craters spaced at regular intervals across the globe and linked by fractured canyons. They give way to the Powder Plains and the jagged northern Glarebright mountains.

  • Oxygen contained deep within the world's interior is released by outgassing and serves to renew the atmosphere: it continuously reacts with surface materials and other atmospheric gases, gradually reducing the percentage of oxygen in the air. Experts predict that the atmosphere will be reduced to a trace in a few tens of million of years.

Native Lifeforms[edit]

Sangax-Cleistra System[edit]

Neither world in the system is known to have native life.

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Cleistra has a Class E Starport, a frontier quality installation with few expected amenities. There is unrefined fuel for starships and a limited variety of ship provisions. There is no shipyard of any kind, but there may be parts and technical support for doing minor services and repair. Ports of this classification generally consist of a downport.

World technology level[edit]

Cleistra possesses a Technology Level of TL–0.

  • These worlds often contain a Proto-Sophont species beginning to establish a nascent civilization and society.
  • This world is in its Alpha Period and has not yet been interfered with by a higher technology civilization.
  • Common Communication technologies for this TL include: Bodily communicative apparati, courier-runners, and smoke signals.
  • Common Power Generation technologies for this TL include: Bodily muscle.
  • Common Transportation technologies for this TL include:
    • Land: Bodily locomotion, riding beasts, and litters or sedan chairs.
    • Water: Swimming, rafts, and canoes.
    • Air: Typically not available unless a bodily ability.

World government[edit]

Cleistra has no central government for the world, an Anarchy. The largest governmental structure would be a family, tribe, or single clan. The largest group will be between 50 and 100 individuals, and there may be dozens to hundreds of them. This governmental structure can be stable over long periods of time if the population remains small or geographically separated.

World military[edit]

No information yet available.

World economy[edit]

No information yet available.

Trade data[edit]

No information yet available.

World demographics[edit]

Cleistra is unpopulated.

World culture[edit]

No information yet available.

Historical data[edit]

No information yet available.

World timeline[edit]

No information yet available.

UWP listing[edit]

No information yet available.

References & Contributors / Sources[edit]

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