Ch'kaahi (world)

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

Ch'kaahi/Sath (Far Home 2836)
Classic Era (1115)
StarportB Good: Spacecraft Construction, Overhaul, Refined fuel
Size6 Medium (9,600 km, 0.60g - 0.81g)
Atmosphere8 Dense
Hydrographics4 Wet World 40%
Population9 High (8 billion)
Government7 Balkanization
Law5 Moderate Law (no concealable weapons)
Tech LevelB Average Stellar (large starships)
See also UWP
System Details
Primary F0 V M8 D M9 D
Planetoid Belts 0
Gas Giants 0
Jump map from [1]

Ch'kaahi is a high-population, pre-rich world with a billion or more sophonts in population size.

  • It lacks adequate resources to expand its economy to a rich status.
  • Its economy and population are rapidly growing and living conditions are expected to quickly rise barring outside forces.
  • It is a member of the Sath Alliance in the Sath Subsector of Far Home Sector.
  • It is the homeworld of the Sath.
  • This world has two colonies:
  • Nearly 100% of the population is composed of Sath.
  • Less than 1% of the population is composed of other non-human sophonts.
  • Warning: humans are not welcome within the Sath Alliance. Those few humans that venture into its territory are generally met with a hostile reception and are closely monitored at all times.

Description / Astrography & Planetology[edit]

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

Trinary Solar System[edit]

Ch'kaahi Trinary Star System
Star Name Hierarchy Color Classification Remarks
Ch'kaahi Primary Primary Yellow-White F0 V None
Ch'kaahi Companion Secondary Red M8 V 148 AU from primary
Ch'kaahi Far Companion Tertiary Red M9 VI 0.15 AU from secondary

System Data[edit]

Ka’ssha-Ch'kaahi System[edit]

The primary is Ka’ssha, an ordinary white main sequence star. It has a luminosity of 8.1 Sols, a mass of 1.7 Sols, and a diameter of 2.366 million km. The inner system consists of (I) a vacuum worldlet, (II) a trace atmosphere inner world, (IV) a corrosive atmosphere inferno world, and (V) a corrosive atmosphere inferno world – orbital position (III) is empty. (VI) Ke'khaa, an exotic atmosphere radworld, orbits within the habitable zone: (Va) Ch'kaahi is its only major moon and is designated the mainworld. (VII) an exotic atmosphere bigworld forms the outer system. Many of the worlds retain satellites.

Ishik-Shirka Subsystem[edit]

The companion is Ishik, a dim red main sequence star lying approximately 148 AU (22.1 billion km) from Ka’ssha. It has a luminosity of 0.0025 Sols, a mass of 0.244 Sols, and a diameter of 334,000 km. The far companion is Shirka, a dim red subdwarf star lying approximately 0.15 AU (22.4) from Ishik. It has a luminosity of 0.00006 Sols, a mass of 0.058 Sols, and a diameter of 73,700 km. (I) a vacuum worldlet, and (II) a very thin atmosphere iceworld form the outer system. Neither world retains satellites.

  • Ka’ssha, the primary, and the Ishik-Shirka Subsystem orbit a barycenter located at around 26.3 AU (orbital position (XI), 4 billion km). They have an orbital period around one another of 95 years 118 days.
  • Ishik and Shirka orbit a barycenter located at around 0.04 AU (orbital position (I), 6 million km). They have an orbital period around one another of 5 days 8 hours.

(VI) Ke'khaa[edit]

(VI) Ke'khaa (UWP Y8A3000-0) is designated a radworld. It orbits Ka’ssha at a mean distance of 2.71 AU (406.9 million km), within the habitable zone. It has an orbital period of 3 years 154 days and a rotation period of 33.5 hours. The axial tilt is 23 degrees. Ke'khaa has a diameter of 10,257 km, a density of 6.23 g/cm³, and a surface gravity of 0.91 G. The world is geologically active. Its atmosphere is rated as Exotic, with a mean surface pressure of 2.41 bar and a composition of 92% nitrogen (N2), 6% carbon dioxide (CO2), 1% methane (CH4), and 1% argon (Ar), water vapor (H2O), neon (Ne), xenon (Xe) and other trace gases. The world has relatively high levels of background radiation: emission rates exceed 12 rads per hour. Approximately 27% of the surface is covered in hot seas of water kept fluid by the high atmospheric pressure: average tidal ranges exceed 0.25m. Mean surface temperature: 102°C. The climate is rated as Inferno and experiences moderate seasonal changes during the local year. The atmosphere is very active and powerful weather systems driven by the star and the seas sweep across the globe.


Ke'khaa retains two natural satellites, a vacuum worldlet named Cha'aa and Ch’kaahi, designated the mainworld:

(VIa) Cha'aa (UWP H100468-A, orbiting at 25 Diameters/255,000 km)
(VIb) Ch’kaahi (designated the mainworld, orbiting at 35 Diameters/360,000 km)

Mainworld Data[edit]

(VIb) Ch’kaahi[edit]

(VIb) Ch’kaahi is the only major moon of (VI) Ke'khaa and is designated the mainworld. It orbits its parent world at a mean distance of 35 diameters (360,000 km), with an orbital period of 25 days 2 hours: it is tidally locked to Ke'khaa. The axial tilt is 8 degrees relative to Ke'khaa. Ch'kaahi has a diameter of 9,936 km, a density of 5.93 g/cm³ and a surface gravity of 0.84 G. Tidal stresses created by the gravitational pull of Ke'khaa cause regular geological activity. Ch’kaahi retains an atmosphere rated as Dense, with a surface pressure of 1.85 bar and a composition of 78% nitrogen (N2), 21% oxygen (O2), and 1% argon (Ar), carbon dioxide (CO2), water vapor (H2O), ozone (O3), neon (Ne) and other trace gases. Approximately 41% of the surface is covered in seas of liquid water: average tidal ranges exceed 0.35m. Mean surface temperature: 23°C. The climate is rated as Temperate-Warm and experiences very minor seasonal changes during the local year. The atmosphere is active and powerful weather systems driven by the star and the seas sweep across the globe.

Mainworld Geography & Topography[edit]

Total surface area: 310 million km², Land surface area: 183 million km², Water surface area: 127 million km². The surface is dominated by rugged mountains, arid badlands and open desert. The climate is generally warm, with temperatures averaging around 23ºC: temperatures rarely fall below freezing at the poles and can reach uncomfortably high levels around the equator.

Native Lifeforms[edit]

Ka’ssha-Ch'kaahi System[edit]

Ch’kaahi has extensive, abundant native life, with organisms inhabiting every ecological niche. Their metabolic functions drive the process of atmospheric renewal.

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

Ishik-Shirka Subsystem[edit]

No native life is known to exist within the subsystem.

History & Background / Dossier[edit]

This system is controlled by the Shikh'aa Faction of the Sath Alliance.

It is the site of the Sa Skah'Sath (the Museum of Sath Cultural History), where exhibits such as the Hiishiiha are on display.

World Starport[edit]

Ch'kaahi 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]

Ch'kaahi possesses a Technology Level of TL–11 or TL-B in Hexadecimal Notation.

World Government[edit]

Ch'kaahi 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]

The Sath Alliance Military Forces have four Military Bases. Most TL–11 warships are constructed at the two available class A starports.

World Economy[edit]

No information yet available.

Trade Data[edit]

No information yet available.

World demographics[edit]

Population: 8,000,000,000

World culture[edit]

  • Homogeneity: D (Fragmented)
  • Acceptance: C (Xenophilic). With regard to humans, their Acceptance is 3 (Xenophobic)
  • Strangeness: 4
  • Symbols: F


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