Leware (world)

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

Leware/Farin (Halcyon 0711)
Classic Era (1115)
StarportD Poor: No Construction, Minor Repair, Unrefined fuel
Size6 Medium (9,600 km, 0.60g - 0.81g)
AtmosphereB Exotic (corrosive)
Hydrographics3 Wet World 30%
Population2 Low (500)
Government0 No Government structure
Law1 Low Law (no explosives, poison gas)
Tech Level7 Pre-Stellar (electronics)
See also UWP
System Details
Primary F3 V BD
Planetoid Belts 3
Gas Giants 4

Leware is a low-population fluid world with a population less than 10,000 sophonts in population size.

Astrography and Planetology[edit]

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

Binary Solar System[edit]

Leware Binary Star System
Star Name Hierarchy Category Mass (Sol) Temp (K) Luminosity (Sol)

F3 V

Primary Main Sequence 1.46 6500 - 7000 5.34
Unit Diameter Min Distance Hab Zone Jump Shadow M-Drive Limit
AU 0.01414 0.19167 1.84 - 2.99 1.414 14.14
Orbit #  * 0 5 4 7
Star Name Hierarchy Category Mass (Sol) Temp (K) Luminosity (Sol)


Secondary Brown Dwarf 0.0276 950 - 1250 0
Unit Diameter Min Distance Hab Zone Jump Shadow M-Drive Limit
AU 0.00092 0.00038 0 - 0.01 0.092 0.92
Orbit #  *  *  *  * 3
1800 AU distant from primary

System Data[edit]

Orchand-Leware System[edit]

The primary is Orchand, an ordinary yellow-white main sequence star. It has a luminosity of 5.34 Sols, a mass of 1.46 Sols and a diameter of 2.115 million km. Orchand's inner system consists of (II) a dense rocky planetoid belt and (IV) a hot small gas giant – orbital positions (I) and (III) are empty. (V) Leware orbits within the habitable zone and is designated the mainworld. (VI) a sparse rocky planetoid belt, (VII) a spectacularly ringed large gas giant, (VIII) a large gas giant, (IX) a small ice giant, and (X) a sparse icy planetoid belt form the outer system. All of the worlds in the system retain satellites.

Harp Subsystem[edit]

The companion is Harp, a magenta-coloured L-type brown dwarf lying approximately 1,800 AU from Orchand. It is not luminous, it has a mass of 0.063 Sols and a diameter of 60,000 km. It retains no planetary bodies.

Mainworld Data[edit]

(IV) Leware[edit]

(IV) Leware is designated the mainworld. It orbits Orchand at a mean distance of 1.74 AU (261 million km), it has an orbital period of 3 years 222 days and a rotation period of 27.3 hours. The axial tilt is 16 degrees. Leware has a diameter of 10,133 km, a density of 6.33 g/cm³, and a surface gravity of 0.91 G. The world is geologically active. Its atmosphere is rated as Insidious, with a mean surface pressure of 35.5 bar and a composition of 93% carbon dioxide (CO2), 5% nitrogen (N2), 1% water vapor (H2O), and 1% argon (Ar), muriatic acid vapor (HCl), sulfur dioxide (SO2), carbon monoxide (CO) and other trace gases. Approximately 27% of the surface is covered in shallow seas of superheated water, kept liquid by the immense atmospheric pressure which increases its boiling point to 243°C: average tidal ranges are around 0.6m. The waters contain many chemicals in solution. Mean surface temperature: 197°C. The atmosphere is dynamic and powerful weather systems, driven by the star and the seas, sweep across the globe. The climate is seasonal.


Leware retains one natural satellite, a cratered vacuum worldlet named Chum:

(IVa) Chum (UWP H300000-0, orbiting at 25 Diameters/250,000 km).

Mainworld Geography and Topography[edit]

Total surface area: 323 million km², Land surface area: 236 million km², Fluid surface area: 87 million km².

Native Lifeforms[edit]

Despite the extremely hostile conditions Leware has primitive native life, consisting entirely of microscopic cyanobacteria-parallels that exist in any location where they can find conditions that meet their biological needs. Their metabolic functions play little part in the process of atmospheric renewal.

History & Background (Dossier)[edit]

Last Line Logo.gif

World starport[edit]

Leware has a Class D Starport, a poor quality installation which has few of the 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 only a downport, unless this is a trade port or system with an hostile environment mainworld.

World technology level[edit]

Leware possesses a Technology Level of TL–7.

  • Common Communication technologies for this TL include: Early video and early satellite communication networks.
  • Common Power Generation technologies for this TL include: Early fuel cells, solar energy, and geothermal power sources.
  • Common Transportation technologies for this TL include:
    • Land: Improved automobiles, hovercraft, and bullet trains.
    • Water: Hydrofoils and early triphibians.
    • Air: Hang gliders and supersonic jets.
    • Space: Deep space probes and interplanetary spacecraft (System Craft).

World government[edit]

Leware 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]

  • Resources: A (Abundant)
  • Labor: 1 (Tens)
  • Infrastructure: 1 (Extremely limited)
  • Efficiency: +2 (Good)

Trade data[edit]

No information yet available.

World demographics[edit]

Population 500


Plastran Down

World culture[edit]

  • Homogeneity: 1 (Monolithic)
  • Acceptance: 1 (Extremely xenophobic)
  • Strangeness: 8
  • Symbols: 7

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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