Urraka (world)

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

Urraka/Jerik (Halcyon 0226)
Classic Era (1115)
StarportC Routine: No Construction, Major Repair, Unrefined fuel
Size4 Small (6,400 km, 0.32g - 0.46g)
Atmosphere7 Standard (tainted)
Hydrographics5 Wet World 50%
Population5 Moderate (100 thousand)
Government5 Feudal Technocracy
Law4 Moderate Law (no light assault weapons)
Tech Level7 Pre-Stellar (electronics)
See also UWP
System Details
Primary Ag Ni
Planetoid Belts 1
Gas Giants 4
Jump map from Travellermap.com [1]

Urraka is an agricultural, nonindustrial world still lacking adequate means to expand its economy.

  • As an agricultural world, this world is a near-ideal environment for producing quality foodstuffs of plant, animal, and other forms. Quality foodstuffs are a major export commodity for this world.
  • It requires extensive imports of outside technology to maintain a modern, star-faring society. Having to import most manufactured and high tech goods drives the price up for these items at this world.
  • It is a Non-Aligned world dominated by human sophonts located in the Jerik Subsector of Halcyon Sector.

Astrography and Planetology[edit]

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

Binary Solar System[edit]

Urraka Binary Star System
Star Name Hierarchy Color Classification Remarks
Urraka Primary Primary Orange K2 V
Urraka Companion Secondary Red M8 VI 2770 AU from primary

System Data[edit]

Hudson-Urraka System[edit]

The primary is Hudson, an ordinary orange main sequence star. It has a luminosity of 0.284 Sols, a mass of 0.723 Sols, and a diameter of 1.073 million km. The inner system consists of (I) a corrosive atmosphere inferno world, and (II) an insidious atmosphere bigworld. (III-I) an exotic atmosphere radworld, and (III-II) Urraka, designated the mainworld, have a shared orbit within the habitable zone. (IV) a trace atmosphere hospitable world, (V) a sparse stony Planetoid Belt, (VI-I) a ringed large gas giant, (VI-II) a small gas giant, and (VII) a large gas giant form the outer system. Many of the worlds retain satellites.

Adler Subsystem[edit]

The companion is Adler, a dim red subdwarf star that lies approximately 2,770 AU from Hudson. It has a luminosity of 0.00054 Sols, a mass of 0.07 Sols, and a diameter of 91,500 km. (I) a trace atmosphere worldlet, (II) a small ice giant, and (III) a vacuum iceworld form the outer system. Many of the worlds retain satellites.

Mainworld Data[edit]

(III-II) Urraka[edit]

(III-II) Urraka is designated the mainworld. It orbits Hudson at a mean distance of 0.82 AU (122.7 million km), within the habitable zone. It has an orbital period of 318 days 23 hours and a rotation period of 17 hours. The axial tilt is 23 degrees. Urraka has a diameter of 7,185 km, a density of 5.37 g/cm³, and a surface gravity of 0.55 G. The world is geologically active. Its atmosphere is rated as Standard, Tainted, with a mean surface pressure of 0.91 bar and a composition of 76% nitrogen (N2), 22% oxygen (O2), 1% argon (Ar), and 1% water vapor (H2O), carbon dioxide (CO2), radon (Rn), ozone (O3), neon (Ne) and other trace gases. The taint is caused by radioactive atmospheric gases (principally radon) and the relatively high levels of background radiation: radiation levels exceed 35 rads per hour. Approximately 48% of the surface is covered in seas of liquid water and sheets of water-ice: average tidal ranges exceed 0.2m. Mean surface temperature: 7°C. The climate is rated as Temperate-Cool and experiences moderate seasonal changes during the local year. The atmosphere is active and strong weather systems driven by the star and the seas sweep across the globe.


Urraka retains two natural satellites, a tiny vacuum worldlet named Pollo and a very small vacuum worldlet named Mecuri:

(III-IIa) Pollo (UWP YS00000-0, orbiting at 7 Diameters/50,000 km)
(III-IIb) Mecuri (UWP YS00000-0, orbiting at 8 Diameters/55,000 km)

Mainworld Geography and Topography[edit]

Total surface area: 162 million km², Land surface area: 84 million km², Water and Ice surface area: 78 million km².

Native Lifeforms[edit]

Hudson-Urraka System[edit]

Urraka, the mainworld, has primitive radiation-tolerant native life, consisting entirely of microscopic cyanobacteria-parallels that thrive in the harsh conditions. Their metabolic functions drive the process of atmospheric renewal.

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

Adler Subsystem[edit]

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

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Urraka 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]

Urraka 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]

Urraka has a Feudal Technocracy government.

  • It is a government by specific individuals for those who agree to be ruled. Relationships are based on the performance of technical activities which are mutually-beneficial.
  • 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]

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