Danube (world)

Danube/Sephi Hydra (Aldebaran 1515)
Classic Era (1116)	C73255A-A Starport C Routine: No Construction, Major Repair, Unrefined fuel Size 7 Medium (11,200 km, 0.70g - 0.94g) Atmosphere 3 Vacuum (very thin) Hydrographics 2 Dry World 20% Population 5 Moderate (200 thousand) Government 5 Feudal Technocracy Law A Extreme Law (no weapons) Tech Level A Early Stellar (jump drive)
See also	UWP
System Details
Primary	M0 V M6 V
Planetoid Belts	0
Gas Giants	4

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Jump map from Travellermap.com

Danube is a poor, nonindustrial world.

• As a nonindustrial world, it requires extensive imports of outside technology to maintain a modern, star-faring society. The need to import most manufactured and high technology goods drives the price of these goods up in the open market.
• This world has few prospects for economic development.
• It is a member of the Solomani Confederation in the Sephi Hydra Subsector of Aldebaran 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.
• It is a member of the Simonides Run.

Description (Astrography & Planetology)

Stellar Data

Danube is a binary star system.

• Both are red main sequence stars.

Danube has two stars in the star system.

Primary
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	M0 V	Main Sequence (Dwarf)		0.57	3770 - 3850	0.13982
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0055	0.031	0.39 - 0.74	0.55	5.5
	Orbit #	*	*	2	1	6
	Remarks
Secondary
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	M6 V	Main Sequence (Dwarf)		0.102	2740 - 2810	0.00034
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0013	0.0015	0.02 - 0.04	0.13	1.3
	Orbit #	*	*	*	0	3
	Remarks		Approximately 2300 AU from the primary.

System Data

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

• The mainworld.
• x4 secondary rocky worlds.
• x4 gas giants.

Mainworld Data

Danube is tidally locked to the primary star.

• The star is always high in the sky on the bright face, it hangs 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 star to move in the sky.

Mainworld Size (S)

Danube is a Meso World between 10,400km and 12,000km in diameter. The world has a standard gravity between 0.7G and 0.9G. The horizon will appear about 4.7km away.

Mainworld Atmosphere (A)

Danube has a pressure of 0.10 to 0.42 atmospheres. The very thin pressures require a respirator or Oxygen Mask. 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)

Danube has 15-25% of its surface covered by liquid water or ice. There may be a few small seas. Wilderness refueling is possible. Water for the inhabitants needs to be imported and extensively recycled. These worlds are Hell Worlds or Poor Worlds depending on their atmosphere.

Mainworld Geography and Topography

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

There are several mountain ranges. Only the twilight zone has standing water, resulting in a ring of seas and lakes between the vast deserts of the bright face and the the frozen wastelands of the dark face. The ice of the dark face is notable as it has large deposits of compressed blue ice, visible from orbit using sensors.

(Blank map, predominantly dry world.)

Native Lifeforms

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

History & Background (Dossier)

Danube is a member of the Simonides Run, a cluster and locally important trade route.

The world was settled as a mining colony by religious refugees from the Grand United States of Quesada. While fleeing persecution, they nonetheless brought with them an oppressive system of laws, similar to those to which they were accustomed.

Danubian Sect

The population follows a sect of the Church of Quesada, one that is regarded by the official Church as heretical. The Quesadan Inquisition has no authority on the world and members of the Inquisition, if they are discovered, face immediate imprisonment or expulsion.

Solomani Security keeps a close eye on things to ensure the security of the Confederation and the well-being of its loyal citizens. Almost anyone could be a SolSec informant, passing on all sorts of useful information: some gain a reward or benefit for their actions, others are coerced, but many see it as an act of duty to help protect the Solomani state and its interests.

World Starport (St)

Danube has a Class C Starport, an average quality installation which features amenities including unrefined fuel for starships, some brokerage services for passengers and cargo, and a variety of ship provisions. There is a shipyard capable of doing maintenance and other kinds of repair. Ports of this classification generally have only a downport, unless this is a trade port or system with an hostile environment mainworld.

The starport is located on a wide plateau on the warm side of the twilight zone.

World Population (P)

Danube has a population of 200,000 sophonts (hundreds of thousands).

• This is a Nonindustrial World, too small to support the complete chain of production of most goods from start to finish.
• The population almost entirely consists of Solomani humans.

Urbanization

Danube Proper, most commonly referred to simply as Proper, is a city-sized zone lying within the central part of the twilight zone, around 250 km from the starport. A heavy rail link connects it to the port.

Linguistic Topography

The most commonly heard languages are:

• Latin, an ancient Terran language used by the Church of Quesada.
• Quesadan Spanish, an Iberian Dialect of the Spanish subfamily of languages of Terran origin spoken principally in the Grand United States of Quesada.
• Rim Anglic, a dialect of Anglic and the principal language of the Confederation.

World Technology Level (T)

Danube possesses a Technology Level of TL–10 or TL-A 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: Grav belts and maturing gravcraft.
  • Air: Greatly improved hybrid grav-aircraft.
  • Space: Improved interplanetary spacecraft (System Craft).
  • FTL: Jump Drive-1.

World Government (G)

Danube is governed by a Feudal Technocracy. Society divides itself based on the technical requirements of the society. Each of these functions are granted as a fief to an individual or group. Leadership of these fiefs determines the head of the government.

World Law (L)

Danube 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. A few worlds with this law level may be a Red Zone and others will be an Amber 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).

Danubean law seems to have evolved along the lines of necessity, with most of the more draconian laws having to do with habitat integrity, atmosphere maintenance, and avoidance of wasting resources.

Trade Data

• Importance: 0 (unimportant)

World Economy

Significant exports include metal ingots and specialized alloys. Major imports include foodstuffs, agricultural supplies, and heavy equipment.

• Resources: C (very abundant)
• Labor: 4 (tens of thousands)
• Infrastructure: 4 (very limited)
• Efficiency: +3 (improved)

World Culture

• Heterogenity: 2 (monolithic)
• Acceptance: 5 (very aloof)
• Strangeness: 7 (confusing)
• 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: Leroy W.L. Guatney of the Federation Development Agency (FDA) (development of the sector)
• Author & Contributor: Dochsavage