Difference between revisions of "Planetary Size"

From Traveller Wiki - Science-Fiction Adventure in the Far future
Jump to navigation Jump to search
(Renaming New Traveller to Mongoose 2nd)
 
(7 intermediate revisions by 3 users not shown)
Line 14: Line 14:
 
! Description
 
! Description
 
! Diameter (Km)
 
! Diameter (Km)
 +
! Horizon (meters)
 
! Expected <br>[[Gravity]]
 
! Expected <br>[[Gravity]]
 
! Remarks
 
! Remarks
Line 20: Line 21:
 
|  [[Planetary Ring]]  
 
|  [[Planetary Ring]]  
 
| Multiple < 1
 
| Multiple < 1
 +
| —
 
| [[Microgravity]] <br> (0.01 G or less)
 
| [[Microgravity]] <br> (0.01 G or less)
 
| [[Planetary Ring]], [[Planetoid]]
 
| [[Planetary Ring]], [[Planetoid]]
Line 26: Line 28:
 
| Debris
 
| Debris
 
| 1+ < 200
 
| 1+ < 200
 +
| tens (maximum)
 
| [[Microgravity]] <br> (0.01 G or less)
 
| [[Microgravity]] <br> (0.01 G or less)
 
| Debris Field, [[Planetoid]]
 
| Debris Field, [[Planetoid]]
Line 32: Line 35:
 
| [[Asteroid]] / [[Planetary Belt]]  
 
| [[Asteroid]] / [[Planetary Belt]]  
 
| Multiple < 200
 
| Multiple < 200
 +
| tens (maximum)
 
| [[Microgravity]] <br> (0.01 G or less)
 
| [[Microgravity]] <br> (0.01 G or less)
 
| [[Planetoid Belt]],  [[Planetoid]]
 
| [[Planetoid Belt]],  [[Planetoid]]
Line 38: Line 42:
 
| Very Small
 
| Very Small
 
| 200-799
 
| 200-799
 +
| hundreds
 
| Very Low Gravity <br> (400 km, 0.02g - 0.03g)
 
| Very Low Gravity <br> (400 km, 0.02g - 0.03g)
 
| [[Very Small World]]
 
| [[Very Small World]]
Line 44: Line 49:
 
| Small
 
| Small
 
| 800-2399
 
| 800-2399
 +
| 2000
 
| Very Low Gravity <br> (1,600 km, 0.05g - 0.09g)
 
| Very Low Gravity <br> (1,600 km, 0.05g - 0.09g)
 
| [[Small World]]
 
| [[Small World]]
Line 50: Line 56:
 
| Small (e.g. [[Luna (world)|Luna]])
 
| Small (e.g. [[Luna (world)|Luna]])
 
| 2,400-3,999
 
| 2,400-3,999
 +
| 2500
 
| Low Gravity <br> (3,200 km, 0.10g - 0.17g)
 
| Low Gravity <br> (3,200 km, 0.10g - 0.17g)
 
| [[Small World]]
 
| [[Small World]]
Line 56: Line 63:
 
| Small (e.g. [[Mercury (SR 1827) (world)|Mercury]])
 
| Small (e.g. [[Mercury (SR 1827) (world)|Mercury]])
 
| 4,000-5,599
 
| 4,000-5,599
 +
| 3000
 
| Low Gravity <br> (4,800 km, 0.24g - 0.34g)
 
| Low Gravity <br> (4,800 km, 0.24g - 0.34g)
 
| [[Small World]]
 
| [[Small World]]
Line 62: Line 70:
 
| Medium (e.g. [[Mars (world)|Mars]])
 
| Medium (e.g. [[Mars (world)|Mars]])
 
| 5,600-7,199
 
| 5,600-7,199
 +
| 3600
 
| Low Gravity <br> (6,400 km, 0.32g - 0.46g)
 
| Low Gravity <br> (6,400 km, 0.32g - 0.46g)
 
| [[Meso World]]
 
| [[Meso World]]
Line 68: Line 77:
 
| Medium
 
| Medium
 
| 7,200-8,799
 
| 7,200-8,799
 +
| 4000
 
| Standard Gravity <br> (8,000 km, 0.40g - 0.57g)
 
| Standard Gravity <br> (8,000 km, 0.40g - 0.57g)
 
| [[Meso World]]
 
| [[Meso World]]
Line 74: Line 84:
 
| Medium
 
| Medium
 
| 8,800-10,399
 
| 8,800-10,399
 +
| 4400
 
| Standard Gravity <br> (9,600 km, 0.60g - 0.81g)
 
| Standard Gravity <br> (9,600 km, 0.60g - 0.81g)
 
| [[Meso World]]
 
| [[Meso World]]
Line 80: Line 91:
 
| Large
 
| Large
 
| 10,400-11,999
 
| 10,400-11,999
 +
| 4800
 
| Standard Gravity <br> (11,200 km, 0.70g - 0.94g)
 
| Standard Gravity <br> (11,200 km, 0.70g - 0.94g)
 
| [[Macro World]]
 
| [[Macro World]]
Line 86: Line 98:
 
| Large (e.g. [[Venus (SR 1827) (world)|Venus]] / [[Terra (SR 1827) (world)|Terra]])
 
| Large (e.g. [[Venus (SR 1827) (world)|Venus]] / [[Terra (SR 1827) (world)|Terra]])
 
| 12,000-13,599
 
| 12,000-13,599
 +
| 5100
 
| Standard Gravity <br> (12,800 km, 0.80g - 1.08g)
 
| Standard Gravity <br> (12,800 km, 0.80g - 1.08g)
 
| [[Macro World]]
 
| [[Macro World]]
Line 92: Line 105:
 
| Large
 
| Large
 
| 13,600-15,199
 
| 13,600-15,199
 +
| 5400
 
| Standard Gravity <br> (14,400 km, 1.03g - 1.33g)
 
| Standard Gravity <br> (14,400 km, 1.03g - 1.33g)
 
| [[Macro World]]
 
| [[Macro World]]
Line 98: Line 112:
 
| Huge
 
| Huge
 
| 15,200-16,799
 
| 15,200-16,799
 +
| 5700
 
| Standard Gravity <br> (16,000 km, 1.14g - 1.48g)
 
| Standard Gravity <br> (16,000 km, 1.14g - 1.48g)
 
| [[Big World]]
 
| [[Big World]]
Line 104: Line 119:
 
| Huge
 
| Huge
 
| 16,800 - 18,399
 
| 16,800 - 18,399
 +
| 6000
 
| High Gravity <br> (17,600 km, 1.49g - 1.89g)
 
| High Gravity <br> (17,600 km, 1.49g - 1.89g)
 
| [[Big World]]
 
| [[Big World]]
Line 110: Line 126:
 
| Huge
 
| Huge
 
| 18,400+
 
| 18,400+
 +
| 6300
 
| High Gravity <br> (19,400 km, 1.9g - 2.0g)
 
| High Gravity <br> (19,400 km, 1.9g - 2.0g)
 
| [[Big World]]
 
| [[Big World]]
Line 116: Line 133:
 
| Small Gas Giant (no further codes)
 
| Small Gas Giant (no further codes)
 
| 40,000-120,000
 
| 40,000-120,000
 +
| —
 
| [[Macrogravity]] <br> (2.01 G or higher)
 
| [[Macrogravity]] <br> (2.01 G or higher)
 
| [[Gas Giant]]
 
| [[Gas Giant]]
Line 122: Line 140:
 
| Large Gas Giant (no further codes)
 
| Large Gas Giant (no further codes)
 
| 120,000-240,000+
 
| 120,000-240,000+
 +
| —
 
| [[Macrogravity]] <br> (2.01 G or higher)
 
| [[Macrogravity]] <br> (2.01 G or higher)
 
| [[Gas Giant]]
 
| [[Gas Giant]]
Line 134: Line 153:
 
<!--T:4-->
 
<!--T:4-->
 
Size included many, many factors including:
 
Size included many, many factors including:
* Gravity
+
* [[Gravity]]
 
* Physical measurement parameters
 
* Physical measurement parameters
 
* Planetary density
 
* Planetary density
Line 155: Line 174:
 
  | {{Ludography cite|name= The Universal World Profile |page=}}
 
  | {{Ludography cite|name= The Universal World Profile |page=}}
 
  | {{Ludography cite|name= T5 Core Rules |page=409,413}}
 
  | {{Ludography cite|name= T5 Core Rules |page=409,413}}
  | {{Ludography cite|name= Core Rule Book|version=New Traveller|page=216-217}}
+
  | {{Ludography cite|name=Core Rule Book | version=Mongoose 2nd|page=216-217}}
 
  | Contributor: Lord (Marquis) and Master of Sophontology [[User:Maksim-Smelchak|Maksim-Smelchak]] of the [[Ministry of Science]]  
 
  | Contributor: Lord (Marquis) and Master of Sophontology [[User:Maksim-Smelchak|Maksim-Smelchak]] of the [[Ministry of Science]]  
 
}}
 
}}

Latest revision as of 20:24, 14 November 2021

Imperial-Sunburst-Sun-Scouts-wiki.png

Planetary Size: Worlds are classified according to their physical size.

Description (Specifications)[edit]

Planetary density and size are two primary factors when determining a planet's gravity.

Planetary Size Data[edit]

The following table outlines the UWP codes for the size of a body:

Planetary Size
Code Description Diameter (Km) Horizon (meters) Expected
Gravity
Remarks
R Planetary Ring Multiple < 1 Microgravity
(0.01 G or less)
Planetary Ring, Planetoid
D Debris 1+ < 200 tens (maximum) Microgravity
(0.01 G or less)
Debris Field, Planetoid
0 Asteroid / Planetary Belt Multiple < 200 tens (maximum) Microgravity
(0.01 G or less)
Planetoid Belt, Planetoid
S Very Small 200-799 hundreds Very Low Gravity
(400 km, 0.02g - 0.03g)
Very Small World
1 Small 800-2399 2000 Very Low Gravity
(1,600 km, 0.05g - 0.09g)
Small World
2 Small (e.g. Luna) 2,400-3,999 2500 Low Gravity
(3,200 km, 0.10g - 0.17g)
Small World
3 Small (e.g. Mercury) 4,000-5,599 3000 Low Gravity
(4,800 km, 0.24g - 0.34g)
Small World
4 Medium (e.g. Mars) 5,600-7,199 3600 Low Gravity
(6,400 km, 0.32g - 0.46g)
Meso World
5 Medium 7,200-8,799 4000 Standard Gravity
(8,000 km, 0.40g - 0.57g)
Meso World
6 Medium 8,800-10,399 4400 Standard Gravity
(9,600 km, 0.60g - 0.81g)
Meso World
7 Large 10,400-11,999 4800 Standard Gravity
(11,200 km, 0.70g - 0.94g)
Macro World
8 Large (e.g. Venus / Terra) 12,000-13,599 5100 Standard Gravity
(12,800 km, 0.80g - 1.08g)
Macro World
9 Large 13,600-15,199 5400 Standard Gravity
(14,400 km, 1.03g - 1.33g)
Macro World
A (10) Huge 15,200-16,799 5700 Standard Gravity
(16,000 km, 1.14g - 1.48g)
Big World
B (11) Huge 16,800 - 18,399 6000 High Gravity
(17,600 km, 1.49g - 1.89g)
Big World
C (12) Huge 18,400+ 6300 High Gravity
(19,400 km, 1.9g - 2.0g)
Big World
SGG Small Gas Giant (no further codes) 40,000-120,000 Macrogravity
(2.01 G or higher)
Gas Giant
LGG Large Gas Giant (no further codes) 120,000-240,000+ Macrogravity
(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 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. Planets with less or more dense cores may have very different values from the suggested average.

History & Background (Dossier)[edit]

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.

Size included many, many factors including:

  • Gravity
  • Physical measurement parameters
  • Planetary density
  • Tectonics
  • Vulcanism
  • etc.

See also[edit]

Universal world profile[edit]

§ == ( Please refer to the following AAB Library Data for more information: ) == §

References & Contributors (Sources)[edit]

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.