[Space] Gravity for Human Homeworld

[scc]

Interesting point, Icelander, I'll try and keep that in mind for next time.

I didn't actually have the Outcome predetermined, I just knew that keeping that result wouldn't end well. I've set the Gravity to 0.81 G and any characters will have a home Gravity of 1G (their Human)

Now for those interested, here is the completed planet

Step 1
Ishichi
The home-world of humanity is this setting. Is TL 7 for aerospace but lower for everything else. 100 years after observing moons around the systems gas giants astromiers discovered an inhabitable planet, Newhome, orbiting the Daystar, a somewhat distant companion star of the Sun, from that point on the race to colonise the newly discovered world was on, currently the former Navel powers control the major off-world colonies.

Step 2
Select Standard (Garden) world

Step 3
Atmospheric Pressure: 0.972
Atmospheric Composition: Normal Garden World Atmosphere
Marginal Atmosphere? Roll of 12 for presence, roll of 12 for type (Pollutants)
Atmospheric Mass: Roll of 12, mas of 1.2

Step 4
Hydrographic Percentage: Roll of 2 for 60% with a +5% mod

Step 5
Roll of 8 for result of 5, with a step of 6 that’s 30 added to the base of 250 for 280 Kelvin
Climate type of cool, Temperature Range of 40º to 60º F
Absorption Factor: 0.88, Greenhouse Factor: 0.16 (These are both likely to change soon)
0.88 X [ 1 + ( 1.2 X 0.16)]= 1.04896 Blackbody Correction
Blackbody Temperature: 266.931 K

Step 6
Density: Roll of 11 for 1.0 modifier of -0.02 for 0.98 total
World Diameter first.
Square Root of (Blackbody Temperature/ Density)[A] is: 16.5084
Minimum Possible diameter is: A X 0.030 = 0.4951[B]
Maximum Possible diameter is: A X 0.065 = 1.0728[C]

Difference [D]= C-B = 0.5776
Roll is 5-2 for 0.3 for multiplier with a +0.01 modifier
Final World Diameter: 0.31 D+ B = 0.6742[E]

Surface Gravity is 0.98 X E= 0.6607[F]
For this setting a low gravity is probably useful, this is very low so instead Gravity will become 0.81 G and Diameter will be re-calculated

Now with Gravity fixed at 0.81 G Diameter needs to be recalculated, .81/.98=.8265[G]
This means that the planet’s mass can be calculated, with a value of .5533[H]

Atmospheric pressure can now be calculated

Step 7
A Roll of 8 for RVM yields a value of -1

An atmospheric pressure of 0.972 is Standard, giving a +3 for Affinity, but those Pollutants mean it’s Marginal, denying it a further +1
Hydrographic Coverage of 65% yields a +2
Finally the Cool climate is another +2 for a total Habitability of +7

Combined with the RVM of -1 that’s a total of +6

Step 8
This is a Homeworld

Step 9
TL is 7 for aerospace, pretty much 6 for everything else, areas related to space-flight and commerce are better off but. Delayed as well

Step 10
Base Carrying Capacity is: 5 million
Affinity Modifier is: 60
Together with the Diameter this gives a maximum of: 166 Million,
This rather low for the described society, so the actual population is likely in the 200 million range, supported by a mixture of more advanced then normal technology and off-world imports
PR: 8

Step 11
The world is Factionalized, split into several different countries

Step 12
The common CR is 3, with a single crumbling CR 2 state

Step 13
Base per-capita Income: $19,000
There’s a -10% for the low Affinity Score, but the presence of some higher technologies offset this for a net of 0%
Final per-capita Income: $19,000
Typical Wealth Level is Average
Economic Volume: 3.8 X 1012

Step 14
There are several Class II Spaceports, one for each major Nation or group of Nations
Most other facilities are present, often more then one per Nation