Kylen (world)

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

Kylen/Loran (Halcyon 1918)
Classic Era (1115)
StarportC Routine: No Construction, Major Repair, Unrefined fuel
Size3 Small (4,800 km, 0.24g - 0.34g)
Atmosphere1 Vacuum (trace)
Hydrographics2 Dry World 20%
Population4 Moderate (40 thousand)
Government3 Self-Perpetuating Oligarchy
Law3 Low Law (no automatic weapons)
Tech Level9 Early Stellar (fusion)
See also UWP
System Details
Primary M4 V M7 VI
Planetoid Belts 1
Gas Giants 4
Jump map from [1]

Kylen is an icy, nonindustrial world, whose surface is ice-capped and with nearly all of its water frozen.

Astrography and Planetology[edit]

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

Binary Solar System[edit]

Kylen Binary Star System
Star Name Hierarchy Color Classification Remarks
Kylen Primary Primary Red M4 V
Kylen Companion Secondary Red M7 VI 303.5 AU from primary

System Data[edit]

Pad System[edit]

The primary is Pad, an ordinary red main sequence star. It has a luminosity of 0.0136 Sols, a mass of 0.3626 Sols, and a diameter of 551,000 km. (I) a standard atmosphere radworld, (II) a vacuum iceworld, (III) a small gas giant, (IV) a small ice giant, (V) a very thin atmosphere radworld, and (VI) a trace atmosphere iceworld form the outer system. Many of the worlds retain satellites.

Darran-Kylen System[edit]

The companion is Darran, a dim red subdwarf star that orbits Pad at 303.5 AU (orbital position (XII), 4.54 billion km) and has an orbital period of 8,780 years. It has a luminosity of 0.00103 Sols, a mass of 0.081 Sols, and a diameter of 109,000 km. (I) a vacuum worldlet, (II) a dense atmosphere stormworld, (III) an exotic atmosphere stormworld, (IV) Isodor, a ringed large gas giant: (IVd) Kylen is its outer moon and is designated the mainworld, (V) a dense stony planetoid belt, and (VI) a small gas giant form the outer system. Many of the worlds retain satellites.

(IV) Isodor[edit]

(IV) Isodor is a ringed large gas giant that orbits Darran at a mean distance of 1.12 AU (167.6 million km) and has an orbital period of 4 years 60 days. It has a diameter of 98,000 km and is a heavily banded brown-tan colour. It retains a family of four major satellites of which the outer, (IVd) Kylen, is designated the mainworld.


Isodor retains a family of four major satellites:

(IVa) Eselde (UWP Y102000-0, orbiting at 8 Diameters/785,000 km)
(IVb) Ormo (UWP Y100000-0, orbiting at 9 Diameters/880,000 km)
(IVc) Jaragen (UWP H4A0000-0, orbiting at 12 Diameters/1.17 million km)
(IVd) Kylen, designated the mainworld, orbiting at 35 Diameters/3.43 million km)

Mainworld Data[edit]

(IVd) Kylen[edit]

(IVd) Kylen is the outer of the four major moons of (IV) Isodor and is designated the mainworld. It orbits its parent world at a mean distance of 35 diameters (3.43 million km), with an orbital period of 1 year 203 days: it is tidally locked to Isodor. It has an axial tilt of 2 degrees. Kylen has a diameter of 4,618 km, a density of 4.29 g/cm³ and a surface gravity of 0.28 G. Tidal stresses caused by the gravitational pull of Isodor cause occasional geological activity. It retains an atmosphere rated as Trace, with a surface pressure of 0.03 bar and a composition of 98% carbon dioxide (CO2), 1% nitrogen (N2), and 1% argon (Ar), neon (Ne), methane (CH4), azane (NH3) and other trace gases. Around 19% of the surface is covered in sheets of water ice. Mean surface temperature: -145°C.

Mainworld geography and topography[edit]

Total surface area: 67 million km², Land surface area: 54 million km², Ice surface area: 13 million km².

Native lifeforms[edit]

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

History & Background (Dossier)[edit]

No information yet available.

World starport[edit]

Kylen 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]

Kylen 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]

Kylen has a Self-Perpetuating Oligarchy government.

  • It is a government by a restricted minority, with little or no input from the masses.
  • 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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  1. "Jump Map API" and map location from