Sci-fi roleplaying and worldbuilding community

User Tools

Site Tools


HX-12 II

HX-12 II is a planet in the HX-12 system. Its warm surface temperatures stay fairly stable in due to a huge axial tilt. At the standard surface temperature, this atmosphere is both toxic due to the concentration of carbon dioxide, and narcotic due to the high pressure argon, but it contains enough Oxygen that with proper facemask respirators, humans can go outside without a full Spacesuit; however, with almost 50% more gravity than standard, moving around can be physically exhausting. There is native life, most visible in the form of sturdy spike-shaped teal-colored fungus that dominates much of the arid surface.


In YE 31, Yarani Tasuku of the YSS Goban was retrieved from this planet by the YSS Eucharis (Mission 6). He had been surviving in a modified Ke-M3 Series "Kylie" Anti-Armor Power Armor and taking shelter in a crashed freighter starship. While they were there, they deployed an Orbital Geological Survey Platform, which was destroyed by the NMX sometime during the Second Mishhuvurthyar War.

Around YE 32 the NMX built a small starport on this planet; it was thought to be destroyed in a nuclear blast in YE 34; however, the base was still inhabited until YE 35 when it was destroyed by the YSS Eucharis via orbital bombardment.

Planetary Data

The following section contains statistical information on the planet.


  • Type: Large iron/silicate
  • Radius: 8898.34 km (1.40 x earth)
  • Surface Area: 9.95 x 108 km2
  • Land Area: 8.96 x 108 km2 (6.01 x earth)
  • Mass: 1.71 x 1025 kg (2.87 x earth)
  • Density: 5.80 g/cm3 (1.05 x earth)
  • Composition: 32.5% iron, 30.5% oxygen, 22.2% magnesium, 11.1% silicon, 3.7% other metals, trace other elements


  • Gravity: 14.37 m/s2 (1.47 x earth)
  • Escape Velocity: 15.99 km/s


  • Period: 39.16 hours
  • Axis Tilt: 62.78 °


  • Water: 11 %
  • Ice: 1 %


  • Type: Dense toxic
  • Pressure: 222.90 kPa (2.20 x earth)
  • Composition : 44.5% argon, 33.2% carbon dioxide, 22.3% oxygen, trace other gases


  • Type: Standard
  • Min Temp: 295 K (22 °C, 72 °F)
  • Avg Temp: 301 K (28 °C, 82 °F)
  • Max Temp: 315 K (42 °C, 108 °F)


  • Chemistry: Carbon
  • Lifeforms: Microbes, fungi

Special Features

  • Wreckage of a crashed starship

OOC Notes

Wes wrote this article. GIF and planet stats generated by Wes using

Places of the SARPiverse
Place Categoriesplanet

planet/hx-12_ii.txt · Last modified: 2023/12/20 18:21 (external edit)