Seich (world)

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Seich/Velous (Far Home 1512)
Classic Era (1116)	B200668-A Starport B Good: Spacecraft Construction, Overhaul, Refined fuel Size 2 Small (3,200 km, 0.10g - 0.17g) Atmosphere 0 Vacuum Hydrographics 0 Desert World 0% Population 6 Moderate (5 million) Government 6 Captive Government/Colony Law 8 High Law (controlled blades) Tech Level A Early Stellar (jump drive)
See also	UWP
System Details
Primary	M3 V M7 VI D
Planetoid Belts	2
Gas Giants	1

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Jump map from Travellermap.com

Seich is a non-agricultural and nonindustrial vacuum world, which warrants hazardous environment precautions.

• Life in a vacuum requires great discipline. After all, it only takes one forgotten seal on a vacuum suit to spell death. Those who survive tend to be very methodically-minded and attentive to small detail.
• It requires extensive imports of outside technology to maintain a modern, star-faring society.
• It is unable to produce quality foodstuffs and must import them.
• It has few prospects for economic development.
• It is a Non-Aligned world dominated by human sophonts located in the Velous Subsector of Far Home Sector.

• This world-system hosts a Military Base, usually associated with military ground forces, which may be located on or off-world.
• This world is controlled by Dhon

Astrography and Planetology

This star system is detailed using the Fringian Variant System Description.

• Seich is considered to be a component of the Missing Link Star Lane.

Trinary Solar System

Seich Trinary Star System

Star Name	Hierarchy	Category		Mass (Sol)	Temp (K)	Luminosity (Sol)
Seich M3 V	Primary	Main Sequence		0.37	3270 - 3430	0.03081
	Unit	Diameter	Min Distance	Hab Zone	Jump Shadow	M-Drive Limit
	AU	0.0017	0.0146	0.18 - 0.35	0.17	1.7
	Orbit #	*	*	0	0	4
Star Name	Hierarchy	Category		Mass (Sol)	Temp (K)	Luminosity (Sol)
Seich M7 VI	Secondary	Main Sequence		0.081	1900 - 2700	0.001
	Unit	Diameter	Min Distance	Hab Zone	Jump Shadow	M-Drive Limit
	AU	0.00073	0.00266	0.03 - 0.04	0.073	0.73
	Orbit #	*	*	*	*	2
	Remarks
	18500 AU from primary
Star Name	Hierarchy	Category		Mass (Sol)	Temp (K)	Luminosity (Sol)
Seich D	Tertiary	White Dwarf		0.53	6800 - 6800	0
	Unit	Diameter	Min Distance	Hab Zone	Jump Shadow	M-Drive Limit
	AU	0.00011	0.00168	0 - 0.03	0.011	0.11
	Orbit #	*	*	*	*	0
	Remarks
	5.35 AU from secondary

System Data

Astor-Seich System

The primary is Astor, an ordinary red main sequence star. It has a luminosity of 0.0202 Sols, a mass of 0.3942 Sols, and a diameter of 604,000 km. (I) a very thin atmosphere radworld, (II) a trace atmosphere radworld, (III) Ditter, an exotic atmosphere bigworld: (IIIa) Seich is its only satellite and is designated the mainworld, (IV-I) a large gas giant, and (IV-II) a vacuum iceworld form the outer system. Many of the worlds retain satellites.

Namsal Subsystem

The companion is Namsal, a dim red subdwarf star that orbits Astor at a mean distance of 5.35 AU (orbital position (VII), 800.4 million km) and has an orbital period of 19 years 259 days. It has a luminosity of 0.00103 Sols, a mass of 0.081 Sols, and a diameter of 109,000 km. (I) a trace atmosphere worldlet, (II) a vacuum worldlet, and (III) a vacuum iceworld form the outer system. All of the worlds retain small satellites.

Gelum Subsystem

The far companion is Gelum, a tiny dwarf star lying approximately 18,500 AU from Astor and Namsal. It has a luminosity of 0.00003 Sols, a mass of 1.11 Sols, and a diameter of 8,450 km. (I) a vacuum iceworld, and (II) a dense icy planetoid belt form the outer system. The iceworld does not retain satellites.

(III) Ditter

(III) Ditter (UWP YDA0000-0) is designated a bigworld. It orbits Astor at a mean distance of 0.73 AU (109.2 million km), within the habitable zone. It has an orbital period of 362 days 20 hours and a rotation period of 43 hours. The axial tilt is 22 degrees. Ditter has a diameter of 21,344 km, a density of 5.37 g/cm³, and a surface gravity of 1.63 G. The world is geologically very active. Its atmosphere is rated as Exotic, with a mean surface pressure of 3.31 bar and a composition of 88% nitrogen (N₂), 10% carbon dioxide (CO₂), 1% argon (Ar), and 1% abiotic oxygen (O₂), water vapor (H₂O), ozone (O₃), neon (Ne) and other trace gases. The world has no hydrosphere. Mean surface temperature: -153°C. The climate is rated as Frigid and experiences moderate seasonal changes during the local year. The atmosphere is dynamic and strong weather systems driven by the star surge across the globe.

Satellite

Ditter retains a single natural satellite:

(IIIa) Seich (designated the mainworld, orbiting at 55 Diameters/1.15 million km)

Mainworld Data

(IIIa) Seich

(IIIa) Seich is the only major moon of (III) Ditter and is designated the mainworld. It orbits its parent world at a mean distance of 55 diameters (1.15 million km), with an orbital period of 106 days 22 hours: it is tidally locked to ditter. The axial tilt is 3 degrees relative to Ditter. Seich has a diameter of 3,526 km, a density of 4.82 g/cm³ and a surface gravity of 0.24 G. Tidal stresses generated by the gravitational pull of Ditter cause frequent geological activity. The atmosphere is rated as Vacuum. The world has no hydrosphere. Mean surface temperature: -168°C.

Mainworld Geography and Topography

Total surface area: 39 million km².

Native Lifeforms

Astor-Seich System

No world in the system is known to have native life.

Namsal Subsystem

No world in the subsystem is known to have native life.

Gelum Subsystem

No world in the subsystem is known to have native life.

History & Background (Dossier)

No information yet available.

World starport

Seich has a Class B Starport, a good 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 most kinds of repair, and construction of non-starships. Most ports of this classification have both a Highport and a Downport.

World technology level

Seich 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

Seich has a Captive Government or Colony. The world is ruled by an external government, there is no self-rule. A colony or conquered area. The local government is an oligarchy appointed by, and answerable only to, the external government.

World military

No information yet available.

World economy

No information yet available.

Trade data

No information yet available.

World demographics

No information yet available.

World culture

No information yet available.

Historical data

No information yet available.

World timeline

• 5338AD–5348AD: Salatho Uprising

UWP listing

No information yet available.

References & Contributors / Sources

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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 Far Future Enterprises or by permission of the author. The page history lists all of the contributions.

• Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS
• Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science