Jirune (world)

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

Jirune/Annistu (Far Home 0336)
Classic Era (1115)
StarportE Frontier - no facilities
Size2 Small (3,200 km, 0.10g - 0.17g)
Atmosphere0 Vacuum
Hydrographics2 Dry World 20%
Population5 Moderate (500 thousand)
Government6 Captive Government/Colony
Law8 High Law (controlled blades)
Tech Level9 Early Stellar (fusion)
See also UWP
System Details
Primary M7 V
Planetoid Belts 2
Gas Giants 1
Jump map from Travellermap.com [1]

Jirune is an icy, nonindustrial vacuum world, warranting hazardous environment precautions.

Astrography and Planetology[edit]

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

Monostellar System[edit]

Jirune Monostellar System
Star Name Hierarchy Color Classification Remarks
Jirune Primary Red M7 V

System Data[edit]

Velovo-Jirune Systm[edit]

The primary is Velovo, a dim red main sequence star. It has a luminosity of 0.004 Sols, a mass of 0.273 Sols, and a diameter of 414,000 km. (I) a trace atmosphere radworld, (II) a sparse stony planetoid belt, (III) Hasa, a ringed large gas giant: Jurune is its outer moon and is designated the mainworld, (IV) a dense icy planetoid belt, (V-I) an exotic atmosphere bigworld, (V-II) a trace atmosphere iceworld, and (VI) a vacuum worldlet form the outer system. Many of the worlds retain satellites.

(III) Hasa[edit]

(III) Hasa is a ringed large gas giant that orbits Velovo at a mean distance of 0.82 AU (122.7 million km), within the outer system, and has an orbital period of 1 year 154 days. It has a diameter of 133,000 km and an atmosphere consisting of 91% hydrogen (H2), 9% helium (He), and less than 1% methane (CH4), carbon monoxide (CO), ammonia (NH3), water vapor (H2O) and other trace gases. It is a brown-tan color with broad pale bands, with a number of large semi-permanent equatorial storms. It retains a family of three major satellites.


Hasa retains three major satellites:

(IIIr) Ring System (UWP YR00000-0, extending to 2 Diameters/265,000 km)
(IIIa) Malasa (UWP Y101000-0, orbiting at 6 Diameters/800,000 km)
(IIIb) Jirune (designated the mainworld, orbiting at 11 Diameters/1.45 million km)
(IIIc) Inik (UWP Y4A0000-0, orbiting at 13 Diameters/1.73 million km)

Mainworld Data[edit]

(IIIb) Jirune[edit]

(IIIb) Jirune is the second of the three major moons of (III) Hasa and is designated the mainworld. It orbits its parent world at a mean distance of 11 diameters (1.45 million km), with an orbital period of 134 days 1 hour: it is tidally locked to Hasa. The axial tilt is 4 degrees relative to Hasa. Jirune has a diameter of 3,016 km, a density of 5.88 g/cm³ and a surface gravity of 0.25 G. Tidal stresses generated by the gravitational pull of Hasa cause occasional geological activity. The atmosphere is rated as Vacuum. Around 18% of the surface is covered in sheets of water-ice. Mean surface temperature: -135°C.

Mainworld Geography and Topography[edit]

Total surface area: 28.6 million km², Land surface area: 23.5 million km², Ice surface area: 5.1 million km².

Native Lifeforms[edit]

Velovo-Jirune Systm[edit]

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

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Jirune has a frontier quality starport.

World technology level[edit]

Jirune possesses a Technology Level of TL–9.

  • Common Communication technologies for this TL include: Fiber optics and satellite communication and data networks.
  • Common Power Generation technologies for this TL include: Early fusion power.
  • Common Transportation technologies for this TL include:
    • Land: Ultra high-speed trains and early grav vehicles.
    • Water: High efficiency sailcraft, multihulled seacraft, improved artificial gears.
    • Air: Tiltrotorcraft, exotic VTOL's, PARWIG, and rocket-assisted suborbitals.
    • Space: SSTO spacecraft, early military spacecraft, and interstellar STL starships
    • FTL: Prototype Jump Drive-1.

World government[edit]

Jirune is a Captive Government or Colony.

  • It is a government by a leadership answerable to an outside group, a colony or conquered area.
  • The typical power source of this government is an Vassal State.
  • The typical power structure of this government is a Federation .

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