Plesan (world)

Plesan/Surgian (Astron 1834)
Classic Era (1116)	X527000-0 Starport X No Starport Size 5 Medium (8,000 km, 0.40g - 0.57g) Atmosphere 2 Vacuum (very thin - tainted) Hydrographics 7 Wet World 70% Population 0 Barren (0) Government 0 No Government structure Law 0 No Law Tech Level 0 Pre-Industrial (primitive)
See also	UWP
System Details
Primary	K1 V
Planetoid Belts	0
Gas Giants	2

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Jump map from Travellermap.com

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

• This world could be populated if anyone had an inclination to do so...
• It is an unclaimed Non-Aligned world located in the Surgian Subsector of Astron Sector.

• This is a temperate world, with a climate of pleasant, average temperatures, considered to be an ideal or near-ideal environment by many different sophont species.

Description (Astrography & Planetology)

Stellar Data

Plesan has a solitary primary star.

• It is an orange main sequence.

Plesan has a solitary primary star.

Primary
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	K1 V	Main Sequence (Dwarf)		0.86	5100 - 5170	0.58985
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0074	0.0637	0.76 - 1.36	0.74	7.4
	Orbit #	*	*	3	2	6
	Remarks

System Data

The worlds of the system have been surveyed. They consist of:

• The mainworld.
• x5 secondary rocky worlds.
• x2 gas giants.

Mainworld Data

The mainworld orbits within the star's Habitable Zone.

• It lies within the zone's prime H region.
• It receives moderate levels of stellar energy.

Mainworld Size (S)

Plesan is a Meso World between 7,200km and 8,800km in diameter. The world has a standard gravity between 0.4G and 0.57G. The horizon will appear about 4km away.

• Tidal stresses generated by the worlds large moon cause seismic and volcanic activity.

Mainworld Atmosphere (A)

Plesan has a pressure of 0.10 to 0.42 atmospheres. The very thin pressures require a respirator or Oxygen Mask. This atmosphere also contains an unusual taint such as disease, a hazardous gas mix, pollutants, or sulfur compounds, which requires the use of a Filter Respirator Combination Mask. Some taints may require more protective equipment. TL–5 or more advanced survival gear is required to settle this world.

• The world has an abiotic oxygen atmosphere.
• Oxygen is produced by photocatalytic conversion of surface materials by stellar energy.
• Fresh surface material is constantly exposed through processes such as seismic activity, volcanism, or erosion.
• The oxygen rapidly depletes from the atmosphere through oxidization with surface materials: a rough equilibrium between production and depletion exists.
• The percentage of oxygen in the atmosphere varies according to the density of global cloud cover.

Mainworld Hydrosphere (H)

Plesan has 65-75% of its surface covered by liquid water. It has significant large liquid bodies. Wilderness refueling is possible.

Satellites

Plesan retains a large exotic atmosphere moon.

• The world orbits once every few weeks.

Mainworld Geography and Topography

No centrally held map of the world exists within AAB Library Data records.

• Locally, detailed maps may be available.
• Verified updated charts are constantly sought.
• Detailed survey data commands premium prices.

(Placeholder chart, predominantly watery world.)

Native Lifeforms

No native life: the world has an abiotic oxygen atmosphere.

History & Background (Dossier)

The system is a remote wilderness. Many of the planets and moons within it may never have had an intelligent being visit them.

• Information about the system is limited.
• The resources of the system are untapped.

Note that social data, though only 40 years old, may be out of date: previously undocumented groups may now inhabit the system and maintain their own culture, forms of government, and systems of law.

• Verified updated data is constantly sought.

World Starport (St)

Plesan does not have a starport. The Class X Starport is an indication that no starport exists in the system. There are no facilities or services available, and no site marked for landing.

World Technology Level (T)

Plesan possesses a Tech Level of TL–0.

• The world has no technological base.

World Government (G)

Plesan has no government or ruling authority of any kind.

World Military

None.

World Law (L)

Plesan has no law level. No laws of any kind are enforced.

World Economy

• Resources: 7 (few)
• Labor: 0 (unpopulated)
• Infrastructure: 0 (non-existent)
• Efficiency: -5 (extremely poor)

Trade Data

• Importance: -3 (very unimportant)

World Demographics (P)

Plesan is unpopulated.

Urbanization

None.

World Culture

• Homogeneity: 0 (none)
• Acceptance: 0 (none)
• Strangeness: 0 (none)
• Symbols: 0 (none)

World Timeline

• 300-420: the First Survey charts the system.
• 995-1065: the Second Survey charts the system.
• 1065: the Second Survey is published.

References & Contributors (Sources)

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Mongoose Publishing or by permission of the author. The page history lists all of the contributions.

• Peter G. Celella, James Holden. Solomani & Aslan (Digest Group Publications, 1991), 50, 51. (Sector named, dot map provided locating world).
• Author & contributor: Jo Grant of CORE (generated data) / Geir Lanesskog (refinement of data).
• Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS