Rysos (world)

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

Rysos/Alasim (Halcyon 0536)
Classic Era (1115)
B444978-B
StarportB Good: Spacecraft Construction, Overhaul, Refined fuel
Size4 Small (6,400 km, 0.32g - 0.46g)
Atmosphere4 Thin (tainted)
Hydrographics4 Wet World 40%
Population9 High (3 billion)
Government7 Balkanization
Law8 High Law (controlled blades)
Tech LevelB Average Stellar (large starships)
See also UWP
System Details
Primary K0 V
Planetoid Belts 1
Gas Giants 3
jumpmap?sector=Halcyon&hex=0536&options=8451&jump=3&scale=32&junk=junk.png
Jump map from Travellermap.com [1]

Rysos is a high-population, industrial world with a billion or more sophonts in population size.

  • As an industrial world, this planet has well-developed manufacturing and processing industries. Manufactured goods are a major export item.
  • Its economy is rapidly growing and living conditions are expected to rapidly improve barring outside forces.
  • It is a member of the Bright Conclave in the Alasim Subsector of Halcyon Sector, which is part of the Distant Fringe.


Astrography and Planetology[edit]

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

Monostellar System[edit]

Rysos Monostellar System
Star Name Hierarchy Color Classification Remarks
Rysos Primary Orange K0 V


System Data[edit]

Cynch-Rysos System[edit]

The primary is Cynch, an ordinary orange main sequence star. It has a luminosity of 0.42 Sols, a mass of 0.825 Sols, and a diameter of 1.263 million km. The inner system consists of (I) a vacuum inner world, (II-I) a corrosive atmosphere inferno world, and (II-II) a very thin atmosphere hospitable world. (III) Rysos orbits within the habitable zone and is designated the mainworld. (IV) an exotic atmosphere bigworld, (V) a sparse stony planetoid belt, (VI) a ringed large gas giant, (VII) a ringed large gas giant, and (VIII) a small gas giant form the outer system. Many of the worlds retain satellites.

Mainworld Data[edit]

(III) Rysos[edit]

(III) Rysos is designated the mainworld. It orbits Cynch at a mean distance of 0.81 AU (121.2 million km), within the habitable zone. It has an orbital period of 293 days 4 hours and a rotation period of 22 hours. The axial tilt is 31 degrees. Rysos has a diameter of 7,168 km, a density of 6.15 g/cm³, and a surface gravity of 0.63 G. The world is geologically active. Its atmosphere is rated as Thin, Tainted, with a mean surface pressure of 0.71 bar and a composition of 70% nitrogen (N2), 28% oxygen (O2), 1% argon (Ar), and 1% water vapor (H2O), carbon dioxide (CO2), ozone (O3), neon (Ne) and other trace gases. The taint is caused by the high percentage of atmospheric oxygen. Approximately 44% of the surface is covered in seas of liquid water: average tidal ranges exceed 0.2m. Mean surface temperature: 6°C. The climate is rated as Temperate-Cool and experiences moderate seasonal changes during the local year. The atmosphere is dynamic and moderate weather systems driven by the star and the seas sweep across the globe.

Satellite[edit]

Rysos retains a single natural satellite, a cratered vacuum worldlet named Bostell:

(IIIa) Bostell (UWP Y200000-0, orbiting at 25 Diameters/800,000 km)

Mainworld Geography and Topography[edit]

Total surface area: 161 million km², Land surface area: 90 million km², Water surface area: 71 million km².

Native Lifeforms[edit]

Cynch-Rysos System[edit]

The hot marginally hospitable world lying in orbital position (II) (within the H– region of the inner system) has primitive thermophile native life, consisting entirely of microscopic cyanobacteria-parallels that thrive in the harsh conditions. Their metabolic functions drive the process of atmospheric renewal.

Rysos, the mainworld, has extensive native life, consisting of microscopic organisms, stromatolite-parallels and primitive flora that can be found in almost every ecological niche. Their metabolic functions drive the process of atmospheric renewal.

No other world in the system is known to have native life.

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Rysos has a good quality starport.

  • A Class-B Starport Facility has not very well developed shipyards and is only capable of producing spaceships.
  • This facility has many very skilled personnel who can perform not only major repair work, but overhaul work as well.
  • This facility has advanced refueling and refining infrastructure. One may purchase practically any kind of refined fuel here.
  • Almost every starport of this class possesses both a Lowport and a Highport. Such ports rarely have more than one of each kind of port.

World technology level[edit]

Rysos possesses a Technology Level of TL–11 or TL-B in Hexadecimal Notation.

World government[edit]

Rysos has a Balkanized government.

  • No central ruling authority exists. Rival governments compete for control.
  • The typical power source of this government is a Balkanization.
  • The typical power structure of this government is a Confederation (Anarchy).

World military[edit]

No information yet available.

World economy[edit]

No information yet available.

Trade Data[edit]

A number of important companies have their headquarters at Rysos:

World demographics[edit]

No information yet available.

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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This article was copied or excerpted from the following copyrighted sources and used under license from Far Future Enterprises or by permission of the author.

  1. "Jump Map API" and map location from Travellermap.com