Estos (Ha 3218) (world)

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

Estos/Abidal (Halcyon 3218)
Classic Era (1115)
StarportE Frontier - no facilities
Size4 Small (6,400 km, 0.32g - 0.46g)
Atmosphere1 Vacuum (trace)
Hydrographics1 Dry World 10%
Population0 Barren (0)
Government0 No Government structure
Law0 No Law
Tech Level0 Pre-Industrial (primitive)
See also UWP
System Details
Primary M9 V M4 VI
Planetoid Belts 1
Gas Giants 3
Jump map from [1]

Estos is a barren world with no overt population, government, or law level.

Astrography and Planetology[edit]

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

  • The Estos system lies within a "shoal" region called Unstable Space. Travel to the system presents a considerable risk to starships.

Binary Solar System[edit]

Estos Binary Star System
Star Name Hierarchy Color Classification Remarks
Estos Primary Primary Red M9 V
Estos Companion Secondary Red M4 VI Orbits primary at 2350 AU

System Data[edit]

Farsite-Estos System[edit]

The primary is Farsite, a dim red main sequence star. It has a companion, Glamis, a red subdwarf, orbiting at 2350 AU. Farsite has a luminosity of 0.001 Sols, a mass of 0.114 Sols and a diameter of 280,000 km. (I, II, III) three rocky vacuum worlds, (IV) Estos, designated the mainworld, (V) a large gas giant, (VI) an exotic atmosphere world, and (VII) a small gas giant form the outer system. Both of the gas giants and many of the rocky worlds retain families of satellites.

Glamis Subsystem[edit]

The primary is Glamis, an ordinary red subdwarf star orbiting Farsite at 2350 AU. It has a luminosity of 0.0038 Sols, a mass of 0.215 Sols and a diameter of 187,000 km. (I) a rocky thin atmosphere world, (II) an icy thin atmosphere world, and (III) a large gas giant form the outer system. The gas giant retains a family of satellites.

Mainworld Data[edit]

(IV) Estos[edit]

(IV) Estos is designated the mainworld. It orbits Farsite at a mean distance of 0.97 AU (145 million km), it has an orbital period of 2 years 22 days and a rotation period of 19.25 hours. The axial tilt is 7.5 degrees. Estos has a diameter of 6,188 km, a density of 5.36 g/cm³, and a surface gravity of 0.47 G. Its atmosphere is rated as Trace, with a mean surface pressure of 0.03 bar and a composition of 91% carbon dioxide, 7% nitrogen: 1% argon, and 1% oxygen, carbon monoxide, nitrogen oxide, neon and other trace gases. Approximately 11% of the surface is covered in a crusting of water-ice. Mean surface temperature: -235° C.


(IV) Estos retains a single large natural satellite, a vacuum moon named Nyoka.

(IVa) Nyoka (Y301000-0, orbiting at 25 diameters/155,000 km)

Mainworld geography and topography[edit]

Total surface area: 120 million km², Land surface area: 106 million km², Ice Coverage: 14 million km².

Native lifeforms[edit]

No worlds within the Estos system have native life.

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Estos has a frontier quality starport.

World technology level[edit]

Estos possesses a Technology Level of TL–0.

  • These worlds often contain a Proto-Sophont species beginning to establish a nascent civilization and society.
  • This world is in its Alpha Period and has not yet been interfered with by a higher technology civilization.
  • Common Communication technologies for this TL include: Bodily communicative apparati, courier-runners, and smoke signals.
  • Common Power Generation technologies for this TL include: Bodily muscle.
  • Common Transportation technologies for this TL include:
    • Land: Bodily locomotion, riding beasts, and litters or sedan chairs.
    • Water: Swimming, rafts, and canoes.
    • Air: Typically not available unless a bodily ability.

World government[edit]

Estos 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