Tavonni (world)

Tavonni/Vilis (Spinward Marches 1520)
Classic Era (1116)	E567000-0 Starport E Frontier - no facilities Size 5 Medium (8,000 km, 0.40g - 0.57g) Atmosphere 6 Standard Hydrographics 7 Wet World 70% 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	G6 V
Planetoid Belts	3
Gas Giants	4

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Jump map from Travellermap.com

Tavonni is a barren world with no overt population, government, or law level.

• This world could be populated if anyone had an inclination to do so...
• It is a member of the Third Imperium in the Vilis Subsector of Spinward Marches Sector in the Domain of Deneb.
• It is a chilly tundra world, with a climate of low temperatures.

Description (Astrography & Planetology)

Stellar Data

Tavonni has a solitary primary star.

• It is a yellow main sequence.

Tavonni has a solitary primary star.

Primary
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	G6 V	Main Sequence (Dwarf)		0.97	5550 - 5600	0.89888
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0088	0.0786	0.91 - 1.61	0.88	8.8
	Orbit #	*	*	3	3	7
	Remarks

System Data

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

• The mainworld.
• x2 secondary rocky worlds.
• x3 planetoid belts.
• x4 gas giants.

Mainworld Data

Tavonni orbits within its star's habitable zone.

• It receives moderate levels of stellar energy.

Mainworld Size (S)

Tavonni is a Meso World between 7,200km and 8,800km in diameter. The world has a standard gravity between 0.4G and 0.57G. The horizon will appear about 4km away.

Mainworld Atmosphere (A)

Tavonni 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 relatively low temperatures.

Mainworld Hydrosphere (H)

Tavonni has 65-75% of its surface covered by liquid water. It has significant large liquid bodies. Wilderness refueling is possible.

Mainworld Geography and Topography

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

(Blank map, predominantly watery world.)

History & Background (Dossier)

Despite its garden environment the world is nearly uninhabited. The system has traditionally been used by the Imperium as a forward observation post against incursions from the Sword Worlds Confederation.

Baroness Heidi Maria Heyerdahl includes the world among her feudal holdings.

World Starport (St)

Tavonni 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)

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

World Technology Level (T)

Tavonni possesses a Tech Level of TL–0.

• The world has no technological base.

World Government (G)

Tavonni has no government or ruling authority of any kind.

World Law (L)

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

Imperial Landed Nobility

Tavonni, as a member world of the Third Imperium has a member of the Imperial Landed Nobility who acts as an Imperial representative to the world.

• It holds the estate of an Imperial knight.

Trade Data

• Importance: -3 (very unimportant)

World Economy

• Resources: 2 (very scarce)
• Labor: 0 (none)
• 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:

• The Year 0: the Third Imperium is founded.
• 300-420: the Imperial First Survey charts the system.
• 589-604: First Frontier War.
• 604-622: the Civil War.
• 615-620: Second Frontier War.
• 624: the Express Boat Network is established.
• 979-986: Third Frontier War.
• 995-1065: the Imperial Second Survey charts the system.
• 1065: the Second Survey is published. Information about the system becomes widely available.
• 1082-1084: Fourth Frontier War, also known as the False War.
• 1107-1110: Fifth Frontier War.

---

IISS GURPS Astrographics Survey

1520 Tavonni (Imperial)

Starport: Class I.

Diameter: 5,057 miles (8,100 km).
Atmosphere: Standard oxygen-nitrogen.
Hydrographics: 68%.
Climate: Cool.
Population: None.
Government: None.
Control Level: 0.
Tech Level: 0.
World Trade Number: 1.

References & Contributors (Sources)

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.

• Marc Miller. The Spinward Marches (Game Designers Workshop, 1979), 14-15.
• Loren Wiseman. "Traveller News Service." Journal of the Travellers' Aid Society 19 (1984): 29.
• Marc Miller. The Spinward Marches Campaign (Game Designers Workshop, 1985), 18-19.
• Marc Miller. Imperial Encyclopedia (Game Designers Workshop, 1987), 94-100. (UWP only)
• Rob Caswell. "Domain of Deneb: Sector Data." MegaTraveller Journal 3 (1992): 47-58. (UWP only)
• Dave Nilsen. The Regency Sourcebook (Game Designers Workshop, 1995), 40-41. (UWP only)
• Martin Dougherty, Neil Frier. Behind the Claw (Steve Jackson Games, 1998), 67.
• Mike West. The Spinward States (Avenger Enterprises, 2008), 100. (UWP only)
• Martin Dougherty. The Spinward Marches (Mongoose Publishing, 2008), .
• Martin Dougherty. Behind the Claw (Mongoose Publishing, 2019), 61-66. (UWP only)
• David Jaques-Watson - Rice Paper SM1520