Myrhan (world)

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

Myrhan/Genesti (Far Home 0408)
Classic Era (1115)
E523534-7
StarportE Frontier - no facilities
Size5 Medium (8,000 km, 0.40g - 0.57g)
Atmosphere2 Vacuum (very thin - tainted)
Hydrographics3 Wet World 30%
Population5 Moderate (200 thousand)
Government3 Self-Perpetuating Oligarchy
Law4 Moderate Law (no light assault weapons)
Tech Level7 Pre-Stellar (electronics)
See also UWP
System Details
Primary M1 V M5 VI
Planetoid Belts 1
Gas Giants 0
jumpmap?sector=Far+Home&hex=0408&options=8451&jump=3&scale=32&junk=junk.png
Jump map from Travellermap.com [1]

Myrhan is a poor, nonindustrial world.

  • As a nonindustrial world, it requires extensive imports of outside technology to maintain a modern, star-faring society. The need to import most manufactured and high technology goods drives the price of these goods up in the open market.
  • This world has few prospects for economic development.
  • It is a Non-Aligned world dominated by human sophonts located in the Genesti Subsector of Far Home Sector.


Astrography and Planetology[edit]

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

Binary Solar System[edit]

Myrhan Binary Star System
Star Name Hierarchy Color Classification Remarks
Myrhan Primary Primary Red M1 V
Myrhan Companion Secondary Red M5 VI 3.1 AU from primary


System Data[edit]

Wantan-Myrhan System[edit]

The primary is Wantan, an ordinary red main sequence star. It has a luminosity of 0.334 Sols, a mass of 0.457 Sols and a diameter of 711,000 km. (I-I) Myrhan, designated the mainworld, and (I-II) Suran, a thin atmosphere hospitable world, have a shared orbit within the habitable zone. Neither world retains satellites.

  • The star experiences periodic flare activity.

Kombu Subsystem[edit]

The companion is Kombu, a red subdwarf star that orbits Wantan at a mean separation of 3.1 AU (463.8 million km). It has a luminosity of 0.002 Sols, a mass of 0.104 Sols and a diameter of 145,000 km. (I) a dense stony planetoid belt forms the outer system.

  • The two stars orbit a barycenter located at around 0.70 AU (orbital position (III), 104.7 million km). They have an orbital period around one another of 8 years 27 days.

Mainworld Data[edit]

(I-I) Myrhan[edit]

(I-I) Myrhan is designated the mainworld. It orbits Wantan at a mean distance of 0.13 AU (19.5 million km), within the habitable zone. It has an orbital period of 25 days 8 hours: it is tidally locked to Wantan. The axial tilt is 4 degrees. Myrhan has a diameter of 8,633 km, a density of 5.98 g/cm³, and a surface gravity of 0.79 G. Tidal stresses generated by the gravitational pull of Wantan cause regular geological activity. Its atmosphere is rated as Very Thin, Tainted, with a mean surface pressure of 0.25 bar and a composition of 82% nitrogen (N2), 16% oxygen (O2), 1% carbon dioxide (CO2), and 1% argon (Ar), water vapor (H2O), carbon monoxide (CO), ozone (O3), neon (Ne) and other trace gases. The taint is caused by a combination of the low percentage of atmospheric oxygen, gases of volcanic origin, and relatively high levels of background radiation: emission rates exceed 1 rad per hour. Approximately 34% of the surface is covered in seas of liquid water: average tidal ranges exceed 0.5m. Mean surface temperature: 18°C. The climate is rated as Temperate-Prime and is static, with no seasonal changes during the local year. The atmosphere is sluggish and weak weather systems, driven by the star and the seas, sweep across the globe.

Mainworld Geography and Topography[edit]

Total surface area: 234 million km², Land surface area: 154 km², Water surface area: 80 million km². Myrhan's bright face is a hot stony desert bathed in the unending glare of the star. Towards the sub-bright and temperate rings the climate becomes cooler and wetter, eventually giving way to the iceberg-littered Loop Sea. The waters give way to glacier fields and arid coldlands. The dark face is permanently crusted with ice, frost and snow. Despite its strong magnetosphere, charged particles streaming off of the star are gradually stripping away Myrhan's atmosphere. Predictions suggest that it will have been reduced to a rating of Trace within a few tens of millions of years. Aurora are visible in the skies at all times.

  • Myrhan is a Twilight Zone World.
  • The world experiences libration, which causes the star to move in the sky and periodically rise and fall above the horizon in the twilight region.

Secondary World Data[edit]

(I-II) Suran[edit]

(I-II) Suran (UWP Y534000-0) is designated a hospitable world. It orbits Wantan at a mean distance of 0.17 AU (25.4 million km), within the habitable zone. It has an orbital period of 37 days 21 hours: it is tidally locked to Wantan. The axial tilt is 3 degrees relative to Wantan. Suran has a diameter of 7,792 km, a density of 4.53 g/cm³, and a surface gravity of 0.50 G. Tidal stresses generated by the gravitational pull of Wantan cause frequent geological activity. Its atmosphere is rated as Thin, Tainted, with a mean surface pressure of 0.43 bar and a composition of 84% nitrogen (N2), 15% oxygen (O2), and 1% argon (Ar), water vapor (H2O), carbon dioxide (CO2), ozone (O3), neon (Ne) and other trace gases. The taint is caused by the low percentage of atmospheric oxygen. Approximately 43% of the surface is covered in seas of liquid water: average tidal ranges exceed 0.3m. Mean surface temperature: 16°C. The climate is rated as Temperate-Prime and is static, with no seasonal changes during the local year. The atmosphere is slow and weak weather systems driven by the star and the seas drift across the globe.

Secondary World Geography and topography[edit]

Total surface area: 191 million km², Land surface area: 109 million km², Water surface area: 82 million km².

  • Suran is a Twilight Zone World.
  • The world experiences libration, which causes the star to move in the sky and periodically rise and fall above the horizon in the twilight region.

Native Lifeforms[edit]

Wantan-Myrhan System[edit]

Myrhan has primitive native life, consisting entirely of microscopic cyanobacteria-parallels that exist in any location where they can find shelter and nutrition. Their metabolic functions maintain the process of atmospheric renewal. The largest recorded lifeforms are primitive worms measuring millimeters in length inhabit the Loop Sea. A number of varieties of hardy offworld flora have been introduced, both accidentally and purposefully, and in some areas they are thriving, despite the harsh, marginal conditions.

Suran has primitive native life, consisting entirely of microscopic cyanobacteria-parallels that exist in any location where they can find shelter and nutrition. Their metabolic functions maintain the process of atmospheric renewal.

Kombu Subsystem[edit]

No native life is known to exist within the subsystem.

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Myrhan has a frontier quality starport.

World technology level[edit]

Myrhan 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.

World government[edit]

Myrhan has a Self-Perpetuating Oligarchy government.

  • It is a government by a restricted minority, with little or no input from the masses.
  • The typical power source of this government is an Oligarchy.
  • The typical power structure of this government is a Hegemony.

World military[edit]

No information yet available.

World economy[edit]

No information yet available.

Trade data[edit]

No information yet available.

World demographics[edit]

Population: 30,000

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