Sieflat (world)

Sieflat/Zdachtalsish (Sidiadl 0126)
Classic Era (1116)	X202000-0 Starport X No Starport Size 2 Small (3,200 km, 0.10g - 0.17g) Atmosphere 0 Vacuum Hydrographics 2 Dry World 20% 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	M1 V M5 V
Planetoid Belts	0
Gas Giants	0

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Jump map from Travellermap.com

Sieflat is an icy, barren vacuum world, with no overt population, government, or law level, which would warrant hazardous environment precautions if anyone lived here.

• Its surface is ice-capped with little or no atmosphere and nearly all of its water frozen.
• This world could be populated by a determined group if they had an inclination to do so...
• It is an unclaimed Non-Aligned world located in the Zdachtalsish Subsector of Sidiadl Sector.

• This world is a "Twilight Zone World", a planet that is tidally-locked to its star. It has a hot side that permanently faces the star, a cold side that permanently faces away, and a narrow twilight zone in-between.

Description (Astrography & Planetology)

Stellar Data

Sieflat is a binary star system.

• Both are red main sequence stars.
  • They are close companions.

Sieflat has two stars in the star system.

Primary
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	M1 V	Main Sequence (Dwarf)		0.5	3620 - 3660	0.08839
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0047	0.0247	0.31 - 0.59	0.47	4.7
	Orbit #	*	*	1	1	6
	Remarks		Flare Star.
Secondary
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	M5 V	Main Sequence (Dwarf)		0.162	2930 - 3060	0.00171
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0018	0.0034	0.04 - 0.09	0.18	1.8
	Orbit #	*	*	*	0	4
	Remarks		Flare Star. Approximately 0.03 AU from the primary.

System Data

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

• The mainworld.
• x6 secondary rocky worlds.

All of the worlds in the system have circumbinary orbits, circling around both stars and receiving their combined energy output.

Mainworld Data

Sieflat is tidally locked to its two close binary stars.

• The stars are always high in the sky on the bright face, they hang on horizon in the twilight zone, while the cold dark face is in permanent darkness.
• The world experiences libration - a regular wobble - as it orbits, causing the stars to move in the sky.

It orbits towards the outer edge of the two star's combined habitable zone.

• It receives relatively low levels of stellar energy.

Mainworld Size (S)

Sieflat is a Small World between 2,400km and 4,000km in diameter. The world has low gravity between 0.1G and 0.17G. The horizon will appear about 2.5km away.

Mainworld Atmosphere (A)

Sieflat has a pressure of less than 0.001 atmospheres which requires the use of a Vacc Suit. TL–8 or more advanced survival gear is required to settle this world.

• Vacuum worlds have no climate, but experience extreme differences in temperature between direct starlight and shade.

Mainworld Hydrosphere (H)

Sieflat has 15-25% of its surface covered by ice, either in vast sheets or contained deep within craters or fractures on the surface. Wilderness refueling is possible. Water for the inhabitants can be got by mining and melting ice.

• The surface of the world is composed of a crust of ice many kilometers thick.
• Much of the surface is cratered and covered in thick layers of regolith and dust of meteoric origin, leaving only a small amount of the icy outer shell exposed.
• Below the outer icy shell there may be a world-ocean of liquid water.

Mainworld Geography and Topography

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

• Locally, detailed maps may be available.

(Blank map, vacuum world.)

Native Lifeforms

There are possibly sub-ice native lifeforms occupying a variety of ecological niches.

History & Background (Dossier)

Sieflat is a frontier, a wild and lonely place that rarely sees visitors. Some of the planets and moons within the system may have never had an intelligent being visit them.

Both of the system's stars experience periodic bouts of flare activity, which causes interference, strange tones and noises, and heavy static on commo and sensors.

• During major outbursts of flare activity radiation levels within the system are dangerously high.
• Exposure to elevated radiation levels causes serious health issues and may damage unshielded electronic devices.

Note that social data, though only 40 years old, may be out of date.

• Verified updated data is constantly sought.

World Starport (St)

Sieflat 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 Population (P)

Sieflat is a Barren World with no sophont population. It may still possess lifeforms.

World Technology Level (T)

Sieflat possesses a Tech Level of TL–0.

• The world has no technological base.

World Government (G)

Sieflat has no government or ruling authority of any kind.

World Law (L)

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

Trade Data

• Importance: -3 (very unimportant)

World Economy

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

World Culture

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

World Timeline

Major events that have affected this world and the wider region that it lies within:

• -5823: the Zhodani Consulate is established.
• -5415: the Zhodani discover jump drive technology.
• -4006 to present: the Zhodani undertake the Core Expeditions.
• The Year 0: far to trailing, the Third Imperium is founded.
• 300-420: the Imperial First Survey charts the system.
• 589-present: the Zhodani and the Imperium fight a sporadic series of Frontier Wars. Most of the action occurs in Tloql Sector, to trailing.
• 995-1065: the Imperial Second Survey charts the system.
• 1065: the Second Survey is published.

References & Contributors / Sources

This article is missing content for one or more detailed sections. Additional details are required to complete the article. You can help the Traveller Wiki by expanding it.

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.

• J. Andrew Keith, Marc Miller, John Harshman. Classic Traveller: Zhodani (Game Designers Workshop, 1985), IFC. (sector depicted and named, no additional data)
• Don McKinney. Mongoose Traveller: Zhodani (Mongoose Publishing, 2011), page 135. (sector depicted and named, no additional data)
• Author & Contributor: Joshua Bell (sector design and development)
• Author & Contributor: P-O Bergstedt (sector design and development)
• Author & Contributor: Michael Gonzalez (sector design and development)