Yalu (world)

Yalu/Sephi Hydra (Aldebaran 1211)
Classic Era (1116)	A665AEF-C Starport A Excellent: Starship Construction, Overhaul, Refined fuel Size 6 Medium (9,600 km, 0.60g - 0.81g) Atmosphere 6 Standard Hydrographics 5 Wet World 50% Population A High (20 billion) Government E Religious Autocracy Law F Extreme Law (rigid control) Tech Level C Average Stellar (robots)
See also	UWP
System Details
Primary	F8 V K1 V
Planetoid Belts	3
Gas Giants	1

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Jump map from Travellermap.com

Yalu is a high-population garden world with a billion or more sophonts in population size and a near-ideal utopian environment conducive to most sophonts.

• Its economy and population are rapidly growing and living conditions are expected to quickly rise barring outside forces.
• It is a member of the Solomani Confederation in the Sephi Hydra Subsector of Aldebaran 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.
• This is a "high technology" world with technology achievements at, near, or above the standard for Charted Space.
• It is a member of the Yalu Cluster.

Description (Astrography & Planetology)

Stellar Data

Yalu is a binary star system.

• The primary is a white main sequence.
• The secondary is an orange main sequence.

Yalu has two stars in the star system.

Primary
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	F8 V	Main Sequence (Dwarf)		1.18	6050 - 6180	1.78479
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0114	0.1108	1.24 - 2.17	1.14	11.4
	Orbit #	*	0	4	3	7
	Remarks
Secondary
	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.
• x10 secondary rocky worlds.
• x3 planetoid belts.
• x1 gas giant.

Mainworld Data

Mainworld Size (S)

Yalu is a Meso World between 8,800km and 10,400km in diameter. The world has a standard gravity between 0.6G and 0.8G. The horizon will appear about 4.4km away.

Mainworld Atmosphere (A)

Yalu has a pressure of 0.71 to 1.49 atmospheres. A Standard Atmosphere does not require survival gear and will likely be easy for most sophonts to breathe.

• It experiences generally moderate temperatures.

Mainworld Hydrosphere (H)

Yalu has 45-55% of its surface covered by liquid water. Wilderness refueling is possible.

Mainworld Geography and Topography

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

Yalu (formally The World of (the deity) Yalu) is a small-standard-sized world with a very clean, standard atmosphere, 2 large oceans, and polar ice-caps.

(Blank map, predominantly dry world.)

History & Background (Dossier)

Yalu was settled towards the end of the Rule of Man. Due to religious-society pressures, the population of Yalu ballooned during the Long Night, causing the population to be in a state of continual near-starvation. Nearly all resources were historically focused on providing adequate food, shelter, and clean water by a well-meaning, but religiously-rigid Church of God (worshipping a deity called Yalu).

With recontact in the 4th century, the religious government immediately embraced TL–12 technologies, and has been implementing advanced power grids, agriculture, aquaculture, and heavy-grav transport since that time. It is still attempting to maintain its historical level of control, but is now constantly debating opening or loosening aspects of its rule-set now that the threat of perpetual starvation has receded.

World Starport (St)

Yalu has a Class A Starport, an excellent quality installation which includes all the expected amenities including refined fuel for starships, brokerage services for passengers and cargo, and a variety of ship provisions. There is a shipyard capable of doing annual maintenance, overhauls and other kinds of repair, and construction of both starships and non-starships. Most ports of this classification have both a Highport and a Downport.

World Population (P)

Yalu has a population of 20,000,000,000 sophonts (tens of billions).

• High Population Worlds like this tend to have huge consumer markets.
• The population almost entirely consists of Solomani Humans.

Urbanization

Rigidly spaced urban centers near water sources are the general rule. Most cities are now updated to TL–12 standards, with some historical preservation efforts.

Linguistic Topography

The most commonly heard languages are:

• Rim Anglic, a dialect of Anglic and the principal language of the Confederation.

World Technology Level (T)

Yalu possesses a Technology Level of TL–12 or TL-C in Hexadecimal Notation.

• Common Communication technologies for this TL include: Holovision, Personal Global Communications, and advanced Translators.
• Common Power Generation technologies for this TL include: Increasingly advanced fusion plants and advanced fuel cells.
• Common Transportation technologies for this TL include:
  • Land, Water & Air: Personal G-Tubes and advanced gravcraft.
  • Space: Advanced interplanetary spacecraft (System Craft).
  • FTL: Jump Drive-3.

World Government (G)

Yalu is governed by a Religious Autocracy. This is a direct theocracy where the government head is a single person who is also the head of the religious organization. The Church hierarchy also serves as the government bureaucracy.

World Law (L)

Yalu has an extreme law level which covers every area of interaction. Laws are complex, detailed, and difficult to understand. Every interaction with the government requires an Advocate. Law enforcement is omnipresent and strict. Legal proceeding can take months to years to resolve and may involve dozens of people. Most worlds with this law level may be an Amber Zone or Red Zone. All objects specifically manufactured as weapons are typically regulated or prohibited (with no exception for private residences; visiting starships are only protected so long as they stay within designated starports and approach corridors). All aspects of life rigidly controlled. There is no difference between the police and the military. This world is a full-fledged police state. Oppression is legalized, though not routine.

The religious philosophy has a environmental element that has legally banned pollution of the environment.

Trade Data

• Importance: 3 (ordinary)

World Economy

Environmental considerations have historically greatly impacted economic and technological advancement on Yalu, until the import of the TL–12 fusion reactors.

• Resources: E (extremely abundant)
• Labor: 9 (billions)
• Infrastructure: 8 (generally available)
• Efficiency: -3 (poor)

World Culture

• Heterogenity: 9 (discordant)
• Acceptance: D (very xenophilic)
• Strangeness: 4 (somewhat distinct)
• Symbols: B (abstract)

World Timeline

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

• -9235: far to coreward, the Vilani discover jump drive technology. Over the centuries pioneers and settlers gradually spread across Charted Space.
• -4045 to -2204: the Ziru Sirka controls vast territories.
• -2431: Terrans discover jump drive technology.
• -2404 to -2215: the Interstellar Wars. The young Terran Confederation battles against the ancient Vilani Ziru Sirka.
• -2204 to -1776: the Rule of Man administers the former Ziru Sirka.
• -1999: the Aslan gain jump drive technology.
• -1862 to -1110: the Terran Mercantile Community is active within the region.
• -1776 to 0: the Long Night.
• -1118 to 380: the Aslan Border Wars.
• -1110 to 588: the Terran Mercantile Community gradually becomes the Old Earth Union, shrinking to control the region around Terra.
• The Year 0: to coreward, the Third Imperium is founded.
• 300-420: the Imperial First Survey charts the system.
• 380: the Peace of Ftahalr ends the ongoing Aslan Border Wars and establishes understandings regarding human and Aslan influence.
• 588: the Old Earth Union and the former territories of the Terran Mercantile Community are annexed by the Imperium, moving its border adjacent to the Aslan Hierate.
• 604-622: the Imperial Civil War.
• 624: the Imperial Express Boat Network is established.
• 704: the Solomani Autonomous Region is formed.
• 800-820: the Psionics Suppressions.
• 871: the Solomani Confederation is founded.
• 940: the Solomani Autonomous Region is dissolved.
• 990-1002: the Solomani Rim War.
• 995-1065: the Imperial Second Survey includes data for the system.
• 1065: the Second Survey is published. Information about the system becomes widely available.

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.

• John Harshman, Marc Miller, Loren Wiseman. Classic Traveller Supplement 8 Library Data (A-M), (Game Designers Workshop, 1981), various pages. (Library data entries)
• John Harshman, Marc Miller, Loren Wiseman. Classic Traveller Supplement 11 Library Data (N-Z), (Game Designers Workshop, 1982), various pages. (Library data entries)
• John Harshman, Marc Miller. Solomani (Game Designers Workshop, 1986), IFC, pages 3, 28. (sector named, background for the sector)
• Peter G. Celella, James Holden. Solomani & Aslan (Digest Group Publications, 1991), pages 8-11, various others. (dot map locating the worlds of the sector, background for the sector)
• Steven Eric Schwartz. MegaTraveller Periodical Imperiallines 2, 1991, page 5. (Bootean Federation, background for the sector)
• Michael Taylor. Fighting Ships of the Solomani (QuikLink Interactive, 2009), page 5. (background for the sector)
• David L. Pulver. Solomani (Mongoose Publishing, 2012), pages 50, 118, 119, various others. (background for the sector)
• Martin J. Dougherty. The Order of Prometheus (Mongoose Publishing, 2023), various pages. (scenarios and background for the sector)
• Zho Berka's Maps (Classic Era UWP Data for the world)
• External Link: Ocean of Storms site (Rebellion Era UWP Data for the sector)
• Author & Contributor: Garnfellow (development of the sector)
• Author & Contributor: Leroy W.L. Guatney of the Federation Development Agency (FDA) (development of the sector)
• Author & Contributor: Dochsavage