Ryosa (world)

This is a world-system under construction and is currently being input-programmed into the Traveller RPG Wiki.

Ryosa/Sithula (Divide 2609)
Classic Era (1116)	?440???-? Starport ? Error in Starport Decode Size 4 Small (6,400 km, 0.32g - 0.46g) Atmosphere 4 Thin (tainted) Hydrographics 0 Desert World 0% Population ? Error in Population Decode Government ? Error in Government Decode Law ? Error in Law Decode Tech Level ? Error in Tech Decode
See also	UWP
System Details
Primary	K0 IV D
Planetoid Belts	1
Gas Giants	4

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Jump map from Travellermap.com

Ryosa

• It is an unclaimed Non-Aligned world located in the Sithula Subsector of Divide Sector.

Astrography and Planetology

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

• It forms a part of the Sithula Sprawl.
• It lies within the Moat Rifts.

Binary Solar System

Ryosa Binary Star System

Star Name	Hierarchy	Category		Mass (Sol)	Temp (K)	Luminosity (Sol)
Ryosa K0 IV	Primary	Giant		2.3	4000 - 5000	4.67
	Unit	Diameter	Min Distance	Hab Zone	Jump Shadow	M-Drive Limit
	AU	0.03071	0.17924	1.72 - 2.8	3.071	30.71
	Orbit #	*	0	5	5	9
Star Name	Hierarchy	Category		Mass (Sol)	Temp (K)	Luminosity (Sol)
Ryosa D	Secondary	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
	2,350 AU from primary

System Data

Ryosa System

The primary is an unnamed orange subgiant star. It has a luminosity of 4.67 Sols, a mass of 2.3 Sols, and a diameter of 4.61 million km. The inner system consists of (III) an exotic atmosphere radworld, and (IV) a corrosive atmosphere inferno world – orbital positions (I) and (II) are empty. (V-I) Ryosa, designated the mainworld, and (V-II) a standard atmosphere hospitable world have a shared orbit within the habitable zone. (VI) a ringed large gas giant, (VII) a very large gas giant, (VIII-I) a small gas giant, and (VIII-II) a ringed small ice giant form the outer system. Many of the worlds retain satellites.

Dwarf Star Subsystem

The companion is an unnamed dwarf star lying approximately 2,350 from the primary. It has a luminosity of 0.00003 Sols, a mass of 1.11 Sols, and a diameter of 8,450 km. (I) a vacuum worldlet, and (II) a sparse icy planetoid belt form the outer system. No significant body retains satellites.

Mainworld Data

(V-I) Ryosa

(V-I) Ryosa is designated the mainworld. It orbits the primary at a mean distance of 1.39 AU (207.9 million km), within the habitable zone. It has an orbital period of 1 year 30 days and a rotation period of 22.5 hours. The axial tilt is 164 degrees. Ryosa has a diameter of 6,977 km, a density of 6.34 g/cm³, and a surface gravity of 0.63 G. The world is geologically active. Its atmosphere is rated as Thin, Tainted, with a mean surface pressure of 0.62 bar and a composition of 83% nitrogen (N₂), 16% abiotic oxygen (O₂), and 1% argon (Ar), carbon dioxide (CO₂), nitrogen dioxide (NO₂), ozone (O₃), neon (Ne) and other trace gases. The taint is caused by the low percentage of atmospheric oxygen and by the lack of water vapor in the atmosphere. Approximately 0.5% of the surface is covered in pools and lakes of liquid water. Mean surface temperature: 63°C. The atmosphere is active and strong weather systems driven by the star drive across the globe. The climate is seasonal.

Mainworld Geography and Topography

Total surface area: 153 million km², Land surface area: 152.3 million km², Water surface area: 700,000 km².

• The oxygen in the atmosphere is abiotic in origin, produced by the photocatalytic reaction between the high levels of UV energy radiating from the star and titanium dioxide (TiO₂), which is found in surface minerals such as ilmenite.

Native Lifeforms

Ryosa, the mainworld, does not have native life.

The temperate hospitable world lying in orbital position (IV) has primitive native life, consisting entirely of microscopic cyanobacteria-parallels that exist within every ecological niche. Their metabolic functions maintain the process of atmospheric renewal.

History & Background (Dossier)

The Ryosa system has been studied by the Local Astrographical Survey Project, a part of the Astronomy Department of the University of Selasia.

World starport

Ryosa has no listed Starport data.

World technology level

Ryosa has no listed Technology Level data.

World government

Ryosa has no listed Government data.

World military

No information yet available.

World economy

No information yet available.

Trade data

No information yet available.

World demographics

Ryosa has no listed Population data.

World culture

No information yet available.

Historical data

No information yet available.

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 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