Ismene (world)

Ismene/Star Bridge (Aldebaran 0116)
Classic Era (1116)	E8A3300-9 Starport E Frontier - no facilities Size 8 Large (12,800 km, 0.80g - 1.08g) Atmosphere A Exotic Hydrographics 3 Wet World 30% Population 3 Low (3 thousand) Government 0 No Government structure Law 0 No Law Tech Level 9 Early Stellar (fusion)
See also	UWP
System Details
Primary	M0 V
Planetoid Belts	0
Gas Giants	0

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Jump map from Travellermap.com

Ismene is a low-population fluid world with a population of less than 10,000 sophonts.

• A fluid world has an oceanic geography consisting of heavily contaminated water or a substance such as ammonia, methane, hydrocarbons, or other exotic liquid.
• It is a member of the Solomani Confederation in the Star Bridge 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.
• This is a cold world with an overall climate that is at the lower temperature range of human-congruous sophont endurance.
• It is a member of the Zarn Cluster.

Description (Astrography & Planetology)

Stellar Data

Ismene has a solitary primary star.

• It is a red main sequence.

Ismene has a solitary primary star.

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

System Data

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

• The mainworld.
• x6 secondary rocky worlds.

Mainworld Data

Ismene is tidally locked to its 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.

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

• It receives relatively low levels of stellar energy.

Mainworld Size (S)

Ismene is a Meso World between 12,000km and 13,500km in diameter. The world has a standard gravity between 0.8G and 1.1G. The horizon will appear about 5.1km away. Vessels with 1G of thrust should check with local starport authorities before attempting to land using emergency power.

Mainworld Atmosphere (A)

Ismene has an Exotic Atmosphere and possesses an unusual gas mix which requires the use of oxygen tanks. Additionally, protective suits, while not necessary, are recommended. TL–8 or more advanced survival gear is required to settle this world.

• It experiences low temperatures within the twilight zone.

Mainworld Hydrosphere (H)

Ismene has 25-35% of its surface covered by water-ice heavily tainted with other substances, which makes it dangerous, corrosive, or toxic. Wilderness refueling will be difficult. Water for the inhabitants needs to be imported and extensively recycled. These worlds may be Hell Worlds.

• The water on the surface may be unsuitable for use or consumption without extensive filtering and purification.
• Refining for fuel may cause issues with shipboard purification plants.

Mainworld Geography and Topography

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

(Blank map, exotic world.)

History & Background (Dossier)

Ismene is a member of the Zarn Cluster, a backwater cluster and minor trade route principally lying within Canopus Sector.

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)

Ismene has a Class E Starport, a frontier quality installation with few expected amenities. There is unrefined fuel for starships and a limited variety of ship provisions. There is no shipyard of any kind, but there may be parts and technical support for doing minor services and repair. Ports of this classification generally consist of a downport.

World Population (P)

Ismene has a population of 3,000 sophonts (thousands).

• This is a Low Population World and the population would be too low to sustain itself without a little outside assistance. This may represent the home base of a sizable but mostly transient population such as the base of a major starship expedition, the last generation of a dying colony, the first generation of a new colony, or a large outpost that will probably evolve into a colony if not stopped.
• The population almost entirely consists of Solomani humans.

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)

Ismene 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 gills.
  • Air: Tiltrotorcraft, exotic VTOL's, PARWIG, and rocket-assisted suborbitals.
  • Space: SSTO spacecraft, early military spacecraft (System Craft), and interstellar STL starships
  • FTL: Prototype Jump Drive-1.

World Government (G)

Ismene has no central government or substantial government apparatus; an Anarchy. The largest governmental structure would be a family, tribe, or single clan. The largest group will be between 50 and 100 individuals, and there may be dozens to hundreds of them. This governmental structure can be stable over long periods of time if the population remains small or geographically separated.

World Law (L)

Ismene has no law in practice. It is an Anarchy. On many worlds, this by itself justifies an Amber Zone advisory. There are few laws, covering only important areas. There may be few or no law enforcement officers, the expectation is citizens will bring law breakers to the attention of the Judicial system. Legal proceedings will be fast, with few people involved. For interactions outside of the framework of the laws, cultural norms dominate.

Trade Data

• Importance: -2 (very unimportant)

World Economy

• Resources: 6 (few)
• Labor: 2 (hundreds)
• Infrastructure: 0 (non-existent)
• Efficiency: -5 (extremely poor)

World Culture

• Heterogenity: 3 (monolithic)
• Acceptance: 1 (extremely xenophobic)
• Strangeness: 1 (very typical)
• Symbols: 9 (somewhat 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.
• -2204 to -1776: the Rule of Man administers the former Ziru Sirka.
• -1862 to -1110: the Terran Mercantile Community is active across the region.
• -1776 to 0: the Long Night.
• -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.
• 588: the Old Earth Union and the former territories of the Terran Mercantile Community are annexed by the Imperium.
• 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)
• CORE Data Site (UWP Data for the world)
• Author & Contributor: Garnfellow (development of the sector)
• Author & Contributor: Leroy W.L. Guatney of the Federation Development Agency (FDA) (development of the sector)