Editing Planetary Size

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[[Planetary Size]]: [[World]]s are classified according to their physical size. 
* Only [[Mainworld]]s ([[world]]s or [[planet]]s) of interest are recorded. 
* e.g. [[Gas Giant]]s are simply classified as Small (SGG) or Large (LGG).
== Description ([[Specifications]]) == <!--T:1-->
Planetary density and size are two primary factors when determining a [[planet]]'s [[gravity]].

=== Planetary Size Data === <!--T:2-->
The following table outlines the [[UWP]] codes for the size of a body:
:{| class="wikitable sortable" width="90%"
|+Planetary Size
! Code
! Description
! Diameter (Km)
! Expected <br>[[Gravity]]
! Remarks
|-
| R
|  [[Planetary Ring]] 
| Multiple < 1
| [[Microgravity]] <br> (0.01 G or less)
| [[Planetary Ring]], [[Planetoid]]
|-
| D
| Debris
| 1+ < 200
| [[Microgravity]] <br> (0.01 G or less)
| Debris Field, [[Planetoid]]
|-
| 0
| [[Asteroid]] / [[Planetary Belt]] 
| Multiple < 200
| [[Microgravity]] <br> (0.01 G or less)
| [[Planetoid Belt]],  [[Planetoid]]
|-
| S
| Very Small
| 200-799
| Very Low Gravity <br> (400 km, 0.02g - 0.03g)
| [[Very Small World]]
|-
| 1
| Small
| 800-2399
| Very Low Gravity <br> (1,600 km, 0.05g - 0.09g)
| [[Small World]]
|-
| 2
| Small (e.g. [[Luna (world)|Luna]])
| 2,400-3,999
| Low Gravity <br> (3,200 km, 0.10g - 0.17g)
| [[Small World]]
|-
| 3
| Small (e.g. [[Mercury (SR 1827) (world)|Mercury]])
| 4,000-5,599
| Low Gravity <br> (4,800 km, 0.24g - 0.34g)
| [[Small World]]
|-
| 4
| Medium (e.g. [[Mars (world)|Mars]])
| 5,600-7,199
| Low Gravity <br> (6,400 km, 0.32g - 0.46g)
| [[Meso World]]
|-
| 5
| Medium
| 7,200-8,799
| Standard Gravity <br> (8,000 km, 0.40g - 0.57g)
| [[Meso World]]
|-
| 6
| Medium
| 8,800-10,399
| Standard Gravity <br> (9,600 km, 0.60g - 0.81g)
| [[Meso World]]
|-
| 7
| Large
| 10,400-11,999
| Standard Gravity <br> (11,200 km, 0.70g - 0.94g)
| [[Macro World]]
|-
| 8
| Large (e.g. [[Venus (SR 1827) (world)|Venus]] / [[Terra (SR 1827) (world)|Terra]])
| 12,000-13,599
| Standard Gravity <br> (12,800 km, 0.80g - 1.08g)
| [[Macro World]]
|-
| 9
| Large
| 13,600-15,199
| Standard Gravity <br> (14,400 km, 1.03g - 1.33g)
| [[Macro World]]
|-
| A (10)
| Huge
| 15,200-16,799
| Standard Gravity <br> (16,000 km, 1.14g - 1.48g)
| [[Big World]]
|-
| B (11)
| Huge
| 16,800 - 18,399
| High Gravity <br> (17,600 km, 1.49g - 1.89g)
| [[Big World]]
|-
| C (12)
| Huge
| 18,400+
| High Gravity <br> (19,400 km, 1.9g - 2.0g)
| [[Big World]]
|-
| SGG
| Small Gas Giant (no further codes)
| 40,000-120,000
| [[Macrogravity]] <br> (2.01 G or higher)
| [[Gas Giant]]
|-
| LGG
| Large Gas Giant (no further codes)
| 120,000-240,000+
| [[Macrogravity]] <br> (2.01 G or higher)
| [[Gas Giant]]
|-
|}
* ''NOTE-1:'' The size code D ( Debris ) is non-standard. It is included to cover such cases as {{WorldS|Comet Mid-Rift|Deneb|3234}}, which are less than 200Km, but not part of an [[asteroid belt]], yet important enough to have mention.
* ''NOTE-2:'' The [[gravity]] values are estimations based on a standard planetary density. [[Planet]]s with less or more dense cores may have very different values from the suggested average.

== History & Background ([[Dossier]]) == <!--T:3-->
When the [[UWP]] was created, any number of planetological figures were considered for inclusion. Initial discussion led to 16 and 32-factor descriptive chains, but these were too many, especially for a [[Universal Code]]. Eventually the UWP was pared down to just eight factors. Of those eight factors, one of the most disputed was ''Planetary Size.'' 

<!--T:4-->
Size included many, many factors including:
* Gravity
* Physical measurement parameters
* Planetary density
* Tectonics
* Vulcanism
* [[etc.]]

== See also == <!--T:5-->
{{Referral-Tree-U-Universal-World-Profile}}

== References & Contributors (Sources) == <!--T:6-->
{{Intermediate}}
{{Sources
 | {{Ludography cite|name=Worlds and Adventures|version=Classic Traveller|page=10}}
 | {{Ludography cite|name=Scouts|page=47}}
 | {{Ludography cite|name= Referee's Manual |page=22}}
 | {{Ludography cite|name= World Builder's Handbook |page=52-53,60-63}}
 | {{Ludography cite|name= World Tamer's Handbook| page=87}}
 | {{Ludography cite|name= First In|page=57-58}}
 | {{Ludography cite|name= The Universal World Profile |page=}}
 | {{Ludography cite|name= T5 Core Rules |page=409,413}}
 | {{Ludography cite|name= Core Rule Book|version=New Traveller|page=216-217}}
 | Contributor: Lord (Marquis) and Master of Sophontology [[User:Maksim-Smelchak|Maksim-Smelchak]] of the [[Ministry of Science]] 
}}

<!--T:7-->
{{LE|Planetology|Planets}}
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