Ivvo (world)

250 px

Ivvo/Shillelagh (Iphigenaia 2901)
Classic Era (1116)	X739000-0 Starport X No Starport Size 7 Medium (11,200 km, 0.70g - 0.94g) Atmosphere 3 Vacuum (very thin) Hydrographics 9 Wet World 90% 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	K5 V M7 V BD BD
Planetoid Belts	0
Gas Giants	4

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Jump map from Travellermap.com

Ivvo 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 an unclaimed Non-Aligned world located in the Shillelagh Subsector of Iphigenaia 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.

Description (Astrography & Planetology)

Ivvo is a quaternary star system.

• The primary is an orange main sequence.
• The secondary is a red main sequence.
• The tertiary is a brown dwarf substellar object.
• The quaternary is a brown dwarf substellar object.

Ivvo has four stars in the star system.

Ivvo
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	K5 V	Main Sequence (Dwarf)		0.7	4300 - 4440	0.28697
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0065	0.0444	0.56 - 1.01	0.65	6.5
	Orbit #	*	*	2	2	6
	Remarks		None
Ivvo
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	M7 V	Main Sequence (Dwarf)		0.09	2630 - 2680	0.00022
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0011	0.0012	0.02 - 0.03	0.11	1.1
	Orbit #	*	*	*	0	3
	Remarks		None
Ivvo
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	BD	Brown Dwarf		0.0276	950 - 1250	0
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.00092	0.00038	0 - 0.01	0.092	0.92
	Orbit #	*	*	*	*	3
	Remarks		None
Ivvo
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	BD	Brown Dwarf		0.0276	950 - 1250	0
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.00092	0.00038	0 - 0.01	0.092	0.92
	Orbit #	*	*	*	*	3
	Remarks		None

System Data

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

• The mainworld.
• x8 secondary rocky worlds.
• x4 gas giants.

Mainworld Data

Ivvo is a Twilight Zone World.

• In the narrow region between permanent night and permanent day, the two stars hang eternally on the horizon.

The mainworld orbits within the primary stars habitable zone.

• The world orbits inside of the stars jump shadow, requiring long manoeuver times to or from a safe jump distance.
• The brown dwarf is superheated by the primary and glows brightly.

Mainworld Size (S)

Ivvo 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)

Ivvo 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.

Mainworld Hydrosphere (H)

Ivvo has 85-95% of its surface covered by liquid water with a few small continents, and a number of islands and archipelagos. Dry land is limited. Wilderness refueling is possible.

Satellites:

No information yet available.

Mainworld Geography and Topography

No information yet available.

Native Lifeforms

Primitive native life. Its metabolic functions drive the process of atmospheric renewal.

History & Background (Dossier)

The system is a desolate frontier. It is likely that very few intelligent beings have ever have set foot on its worlds.

• Commercial traffic is rare: the system sees very few visiting ships.
• Commo only picks up natural background noise and static.
• There are no active navigation beacons.

World Starport (St)

Ivvo does not have a starport. The Class X Starport is an indication that no starport exists in the system. There are no facilities or services available, and no site marked for landing.

Facilities

None.

World Technology Level (T)

Ivvo possesses a Tech Level of TL–0.

• The world has no technological base.

World Government (G)

Ivvo has no government or ruling authority of any kind.

World Military

None.

World Law (L)

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

World Economy

• Resources: 6 (few)
• Labor: 0 (unpopulated)
• Infrastructure: 0 (non-existent)
• Efficiency: +1 (average)

Trade Data

• Importance: -3 (very unimportant)

World Demographics (P)

Ivvo is unpopulated.

Urbanization

None.

World Culture

• Homogeneity: 0 (none)
• Acceptance: 0 (none)
• Strangeness: 0 (none)
• Symbols: 0 (none)

World Timeline

No information yet available.

UWP Listing

No information yet 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.

• Mark Gelinas. Dark River (Tidewater Traveller Club, 1988), .
• Peter G. Celella, James Holden. Solomani & Aslan (Digest Group Publications, 1991), 50, 51. (sector named, dot map provided locating world)
• Author & Contributor: Jo Grant of CORE (generated data)
• Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS