Yasah (world)

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

Yasah/Demon's Eye (Far Home 1021)
Classic Era (1115)
StarportD Poor: No Construction, Minor Repair, Unrefined fuel
Size5 Medium (8,000 km, 0.40g - 0.57g)
AtmosphereA Exotic
Hydrographics2 Dry World 20%
Population1 Low (10)
Government0 No Government structure
Law0 No Law
Tech Level8 Pre-Stellar (superconductors)
See also UWP
System Details
Primary M2 V
Planetoid Belts 3
Gas Giants 1
Jump map from Travellermap.com [1]

Yasah is a low population, fluidic hellworld of less than 10,000 sophonts struggling to survive in a inhospitable environment.

  • A fluid world has an oceanic geography of a liquid other than water such as ammonia, methane, hydrocarbons, or other exotic liquids.
  • Hellworlds often offer daily, and sometimes hourly, life-threatening situations to their inhabitants.
  • It is a Non-Aligned world dominated by human sophonts located in the Demon's Eye Subsector of Far Home Sector.

Astrography and Planetology[edit]

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

  • The supergiant primary of the Demon's Eye system and the huge Demon's Eye Nebula that surrounds it, lying a few parsecs to trailing, are clearly visible in the sky.

Monostellar System[edit]

Yasah Monostellar System
Star Name Hierarchy Color Classification Remarks
Yasah Primary Red M2 V

System Data[edit]

Mannah-Yassah System[edit]

The primary is Mannah, an ordinary red main sequence star. It has a luminosity of 0.0268 Sols, a mass of 0.4258 Sols, and a diameter of 658,000 km. (I-I) a corrosive atmosphere inferno world, and (I-II) a vacuum worldlet have a shared orbit within the habitable zone. (II-I) Yasah, designated the mainworld, (II-II) a sparse stony planetoid belt, (III) a ringed large gas giant, (IV) a sparse stony planetoid belt, (V-I) a trace atmosphere iceworld, (V-II) a sparse stony planetoid belt, and (VI) a vacuum iceworld form the outer system. Many of the worlds retain satellites.

Mainworld Data[edit]

(II-I) Yasah is designated the mainworld. It orbits Mannah at a mean distance of 0.35 AU (52.4 million km), within the H– region of the outer system. It has an orbital period of 115 days 22 hours and a rotation period of 73 hours. The axial tilt is 9 degrees. Yasah has a diameter of 8,655 km, a density of 4.97 g/cm³, and a surface gravity of 0.61 G. Tidal stresses generated by the gravitational pull of Mannah cause occasional geological activity. Its atmosphere is rated as Exotic, with a mean surface pressure of 4.45 bar and a composition of 95% nitrogen (N2), 3% methane (CH4), 1% argon (Ar), and 1% carbon dioxide (CO2), carbon monoxide (CO), abiotic oxygen (O2), water vapor (H2O), azane (NH3), hydrogen (H2), neon (Ne) and other trace gases. Approximately 16% of the surface is covered in sheets of water ice and lakes of ammonium hydroxide (NH4OH) kept liquid by geothermal heat generated by radioactives present in the lithosphere. Mean surface temperature: -65°C. The climate is rated as Very Cold and is static, with no seasonal changes during the local year. The atmosphere is dynamic and strong weather systems driven by the star and the seas sweep across the globe.


Yasah retains a single natural satellite, a tiny vacuum worldlet named Iono:

(II-Ia) Iono (UWP YS00000-0, orbiting at 6 Diameters/52,000 km)

Mainworld Geography and Topography[edit]

Total surface area: 235 million km², Land surface area: 197 million km², Water surface area: 38 million km².

Native Lifeforms[edit]

Mannah-Yasah System[edit]

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

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Yasah has a poor quality starport.

  • A Class-D Starport Facility has minimal if any shipyards and can only perform extremely limited repair work.
  • This facility has many skilled personnel who can perform minor repair work.
  • This facility has refueling infrastructure and limited refining capabilities. One may purchase unrefined fuel here.
  • Starports of this class very rarely have both a Lowport and a Highport.

World technology level[edit]

Yasah possesses a Technology Level of TL–8.

  • Common Communication technologies for this TL include: Fiber optics, improved telephones, and satellite communication and data networks.
  • Common Power Generation technologies for this TL include: Improved geothermal and improved batteries.
  • Common Transportation technologies for this TL include:
    • Land: Advanced automobiles.
    • Water: Triphibians and early artificial gills.
    • Air: Improved helicopters and hypersonic jets.
    • Space: Space shuttles, early space stations, and improved interplanetary spacecraft.

World government[edit]

Yasah has no well-defined government structure.

  • In many cases, tribal, clan or family bonds predominate.
  • The typical power source of this government is an Pantocracy or Chaos.
  • 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]

No information yet available.

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