Jastamin (world)

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

Jastamin/Jerik (Halcyon 0727)
Classic Era (1115)
StarportC Routine: No Construction, Major Repair, Unrefined fuel
Size6 Medium (9,600 km, 0.60g - 0.81g)
Atmosphere7 Standard (tainted)
Hydrographics6 Wet World 60%
Population7 Moderate (30 million)
Government7 Balkanization
Law6 Moderate Law (no firearms except shotguns)
Tech Level5 Industrial (mass production)
See also UWP
System Details
Primary F2 V BD M5 VI
Planetoid Belts 0
Gas Giants 0
Jump map from Travellermap.com [1]

Jastamin is a preindustrial, agricultural world.

Astrography and Planetology[edit]

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

Trinary Solar System[edit]

Jastamin Trinary Star System
Star Name Hierarchy Color Classification Remarks
Jastamin Primary Primary Yellow-White F2 V
Jastamin Companion Secondary Brown Dwarf BD 735 AU from primary
Jastamin Far Companion Tertiary Red M5 VI 1860 AU from primary

System Data[edit]

Receve-Jastamin System[edit]

The primary is Receve, an ordinary white main sequence star. It has a luminosity of 6.26 Sols, a mass of 1.54 Sols, and a diameter of 2.198 million km. The inner system consists of (III) an exotic atmosphere radworld, (IV) a corrosive atmosphere inferno world, and (V) a standard atmosphere hospitable water world – orbital positions (I) and (II) are empty. (VI) Jastamin orbits within the habitable zone and is designated the mainworld. Few of the worlds retain satellites.

Lyzo Subsystem[edit]

The companion is Lyzo, a magenta-colored L-type brown dwarf lying approximately 735 AU from Receve and approximately 1,250 AU from Calish. It is not luminous, it has a mass of 0.062 Sols and a diameter of 60,000 km. It does not retain a planetary system.

Calish Subsystem[edit]

The far companion is Calish, a dim red subdwarf star lying approximately 1,860 AU from Receve and approximately 1,250 AU from Lyzo. It has a luminosity of 0.002 Sols, a mass of 0.104 Sols, and a diameter of 145,000 km. (I) a vacuum iceworld forms the outer system: it retains no satellites.

  • The star experiences periodic flare activity.

Mainworld Data[edit]

(VI) Jastamin[edit]

(VI) Jastamin is designated the mainworld. It orbits Receve at a mean distance of 2.57 AU (384.5 million km), within the habitable zone. It has an orbital period of 3 years 117 days and a rotation period of 44 hours. The axial tilt is 23 degrees. Jastamin has a diameter of 9,504 km, a density of 4.52 g/cm³, and a surface gravity of 0.61 G. The world is geologically active. Its atmosphere is rated as Standard, Tainted, with a mean surface pressure of 0.85 bar and a composition of 72% nitrogen (N2), 26% 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 60% of the surface is covered in oceans of liquid water: average tidal ranges exceed 0.35m. Mean surface temperature: 33°C. The climate is rated as Hot and experiences moderate seasonal changes during the local year. The atmosphere is active and strong weather systems driven by the star and the oceans sweep across the globe.


Jastamin retains a single natural satellite, a vacuum worldlet named Kurag:

(VIa) Kurag (UWP Y200000-0, orbiting at 25 Diameters/240,000 km)

Mainworld Geography and Topography[edit]

Total surface area: 284 million km², Water surface area: 170 million km², Land surface area: 114 million km².

Native Lifeforms[edit]

Receve-Jastamin System[edit]

The temperate hospitable water world lying in orbital position (V) (within the H– region of the inner system) has extensive, abundant native life, with complex organisms inhabiting every ecological niche. Their metabolic functions drive the process of atmospheric renewal.

Jastamin, the mainworld, has extensive, abundant native life, with complex organisms inhabiting every ecological niche. Their metabolic functions drive the process of atmospheric renewal.

Lyzo Subsystem[edit]

The subsystem does not have native life.

Calish Subsystem[edit]

No body in the subsystem is known to have native life.

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Jastamin has a routine quality starport.

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

World technology level[edit]

Jastamin possesses a Technology Level of TL–5.

  • Common Communication technologies for this TL include: Telephone, radio, and television.
  • Common Power Generation technologies for this TL include: Electricity, hydrocarbon internal combustion, and the most fundamental atomic energy.
  • Common Transportation technologies for this TL include:
    • Land: Ground cars or automobiles and tracked vehicles.
    • Water: Large ships and submersibles with steel hulls.
    • Air: Early aircraft including seaplanes and very early unmanned rockets.

World government[edit]

Jastamin 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]

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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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