Translations:Planetary Size/2/en
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Planetary Size Data
The following table outlines the UWP codes for the size of a body:
Planetary Size Code Description Diameter (Km) Expected
GravityRemarks R Planetary Ring Multiple < 1 Microgravity
(0.01 G or less)Planetary Ring, Planetoid D Debris 1+ < 200 Microgravity
(0.01 G or less)Debris Field, Planetoid 0 Asteroid / Planetary Belt Multiple < 200 Microgravity
(0.01 G or less)Planetoid Belt, Planetoid S Very Small 200-799 Very Low Gravity
(400 km, 0.02g - 0.03g)Very Small World 1 Small 800-2399 Very Low Gravity
(1,600 km, 0.05g - 0.09g)Small World 2 Small (e.g. Luna) 2,400-3,999 Low Gravity
(3,200 km, 0.10g - 0.17g)Small World 3 Small (e.g. Mercury) 4,000-5,599 Low Gravity
(4,800 km, 0.24g - 0.34g)Small World 4 Medium (e.g. Mars) 5,600-7,199 Low Gravity
(6,400 km, 0.32g - 0.46g)Meso World 5 Medium 7,200-8,799 Standard Gravity
(8,000 km, 0.40g - 0.57g)Meso World 6 Medium 8,800-10,399 Standard Gravity
(9,600 km, 0.60g - 0.81g)Meso World 7 Large 10,400-11,999 Standard Gravity
(11,200 km, 0.70g - 0.94g)Macro World 8 Large (e.g. Venus / Terra) 12,000-13,599 Standard Gravity
(12,800 km, 0.80g - 1.08g)Macro World 9 Large 13,600-15,199 Standard Gravity
(14,400 km, 1.03g - 1.33g)Macro World A (10) Huge 15,200-16,799 Standard Gravity
(16,000 km, 1.14g - 1.48g)Big World B (11) Huge 16,800 - 18,399 High Gravity
(17,600 km, 1.49g - 1.89g)Big World C (12) Huge 18,400+ 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.