Editing Ryosa (world)

 {{UWP 
|name= {{World|Ryosa|Divide|Sithula|2609}}
|system= 
|uc    = ?440???-?
|popc  = ?
|zonec = green
 |u1= 
|alg     = NaXX
|class   = De He Po
|trade   = De
|climate = TBD
|orbit   = TBD
|gravity = TBD
|nblty   = -
|bases   = -
|primary = K0 IV D
|belts   = 1
|GGcount = 4
}}
{{World summary |name= Ryosa|trade=De He Po}}
{{World summary NaXX|sector= Divide|subsector=Sithula}}
 
== Astrography and Planetology == 
This [[star system]] is detailed using the [[Fringian Variant System Description]].
* It forms a part of the [[Glitterdrift Reach]].
* It lies within the [[Moat Rifts]].

{{BinaryStarSystem
|name           = Ryosa
|primary        = K0 IV
|secondary      = DA
|PrimaryNotes   =
|SecondaryNotes = 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 [[ring]]ed [[large gas giant]], (VII) a very [[large gas giant]], (VIII-I) a [[small gas giant]], and (VIII-II) a [[ring]]ed 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 atmosphere|Thin]], [[Tainted atmosphere|Tainted]], with a mean surface pressure of 0.62 bar and a composition of 83% nitrogen (N<sub><small>2</small></sub>), 16% abiotic oxygen (O<sub><small>2</small></sub>), and 1% argon (Ar), carbon dioxide (CO<sub><small>2</small></sub>), nitrogen dioxide (NO<sub><small>2</small></sub>), ozone (O<sub><small>3</small></sub>), neon (Ne) and other trace gases. The [[Tainted atmosphere|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.

==== Satellite ====
Ryosa retains a single natural satellite, a tiny cratered [[vacuum]] [[worldlet]] named Curlew:
: (V-Ia) Curlew (known [[UWP]] ?S00???-?, orbiting at 7 Diameters/49,000 km)

==== 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 (TiO<sub><small>2</small></sub>), 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) (within the [[habitable zone]]) 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 ==
{{Intermediate}}
{{Detail}}
{{Sources
|S1= Author & Contributor: Lord (Marquis) and Master Scout Emeritus [[User: Alagoric|Adie Alegoric Stewart]] of the [[IISS]]
|S2= Author & Contributor: Lord (Marquis) and Master of Sophontology [[User:Maksim-Smelchak|Maksim-Smelchak]] of the [[Ministry of Science]]
|S3= 
}}


{{LEA|Distant Fringe|Binary Star System|Glitterdrift Reach worlds|T5 Second Survey worlds}}