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Spaceception

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  • About me
    Engineering Student
  • Location
    Setting course for Rocheworld
  • Interests
    Gloria in astra caput
    Lets head to the stars

    Writing, KSP (why else am I here?), Spaceflight (crewed and robotic), Astrobiology and the search for habitable exoplanets, Interplanetary travel and colonization, Interstellar travel, and watching or reading plenty of science fiction and fantasy.

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  1. Spaceception

    Worked out some values for a civilization in a book that may be familiar to you... (Hint. It's on the forums)

    Parent star (Unnamed): K2-type. 0.85x the mass and 0.88x the radii of the Sun. With 0.61x the luminosity (Values from "How to build a star" by Artifexian) Inner HZ limit ~0.74 AU, outer HZ limit ~1.07 AU.

    Main planet (Unnamed): Temperate Terra. 0.37x the mass, and 0.66x the radius. With ~1.22x the density of Earth, and ~0.85 g on the surface. Semi-major axis: 0.75 AU, orbital period: 278.9 days. (Values from "Terrestrial worlds: physical characteristics" also by Artifexian)
    Speculative/Random values: Day/Night cycle, 19 hours, 13 minutes. Axial tilt: 33 degrees (Within the range of a habitable planet, from "Seasonbuilding 101"). Atmospheric pressure, 1.6 atm. Gases and temperature are subject to change. (From "Designing Earth-like atmospheres") 10.8 Celsius. Atm gases, 68.5% N2, 27.6% O2, 2.5% Ar, 1% CO2, 0.4% trace gases. (You can see why it's subject to change. I don't know of calculators/calculations that can give me a quick and dirty temperature value based on CO2 concentration, albedo, and atm pressure).

    Moon (Unnamed): Temperate Selena: 0.00227x the mass, and 0.1476 the radii of Earth. giving it a surface gravity of 0.104 g. It orbits 's 30 planetary radii (Based on the above planet) out from the planet, giving it an orbital period of 15.88 days. (From "terrestrial Moons")

    Now I need to find the geostationary height of the planet, think of tectonics, albedo, and of some interesting aliens. Finally, filling in the gaps for the rest of the solar system. Whew :) 

    1. Spaceception

      Spaceception

      Changes to the planet: Day/Night cycle ~19 hrs 9 minutes. Geostationary height, ~21846 km. Atm. comp. 68.5% N2, 27.6% O2, 2.8% Ar, ).042 CO2, 0.000006 SO2. Unbreathable. Albedo 39.92%, Temp, ~10 Celsius.

       

      B: Hot Selena. 0.07x the mass, 0.44x the radius of Earth. 0.36g. Temp: 456K with 0.12 Albedo. 61.68 day orbit. Tidally locked.

      C: Warm desert. 0.23 x the mass, 0.68x the radius. 0.497 g. Temp: 314K With 0.16 Albedo. 181 day orbit. Thin atmosphere, no water, weak magnetosphere.

      E: Icy world. 0.029 x the mass, 0.31 x the radius of Earth. 0.31 g. Temp: 211K with 0.44 Albedo. 452 day orbit. Thin atmosphere, small subsurface lakes, no life.

      E1: Icy world (Moon): 0.0014 x the mass, and 0.1022x the radius. (Will probably change. The gravity seems a bit high). Temp: 220K with 0.32 Albedo. Orbits its primary every 37.2 days. No atmosphere, tidally locked, small subsurface seas, no life?

      Pretty compact system for a K type star :) There's an asteroid belt of course, but the entire system has <4 AU radius. Reason will be explained at some point in the future... I have a premise and all, but no real conflicts or suitable ending for the story yet.

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