HX-16 is one of the twenty systems charted by Taisa Hanako while she commanded the YSS Elfin Princess in YE 30.

• Type M1 V Red Dwarf
• Radius 2.82 x 10⁵ km (0.40 x sol)
• Mass 6.17 x 10²⁹ kg (0.31 x sol)
• Temperature 3200 K
• Luminosity 2.04 x 10²⁵ W (0.05 x sol)

• Type Terrestrial World
• Orbital Radius 2.63 x 10⁷ km (0.18 AU)
• Period 1.15 x 10³ hours (0.13 earth years)
• Physics Large ocean
• Hydrosphere 90 % water, 1 % ice
• Atmosphere Dense toxic
• Biosphere Prokaryotic microbes
• Special 4 small moons, advanced alien artifact

• Rock Planet
• Orbital Radius 4.61 x 10⁷ km (0.31 AU)
• Period 2.69 x 10³ hours (0.31 earth years)
• Gravity 14.35 m/s² (1.47 x earth)
• Special Wreckage of a crashed starship

• Type Rock Planet
• Orbital Radius 6.43 x 10⁷ km (0.43 AU)
• Period 4.42 x 10³ hours (0.51 earth years)
• Gravity 1.51 m/s² (0.15 x earth)

• Type Rock Planet
• Orbital Radius 1.06 x 10⁸ km (0.71 AU)
• Period 9.36 x 10³ hours (1.07 earth years)
• Gravity 10.32 m/s² (1.06 x earth)
• Special Heavy volcanism, trace atmosphere

• Type Asteroid Belt
• Orbital Radius 1.82 x 10⁸ km (1.22 AU)
• Period 2.11 x 10⁴ hours (2.42 earth years)

• Type Jovian Planet
• Orbital Radius 3.33 x 10⁸ km (2.23 AU)
• Period 5.21 x 10⁴ hours (5.97 earth years)
• Gravity 5.73 m/s² (0.59 x earth)
• Special 26 small moons

• Type Uranian Planet
• Orbital Radius 6.34 x 10⁸ km (4.24 AU)
• Period 1.37 x 10⁵ hours (15.68 earth years)
• Gravity 8.16 m/s² (0.83 x earth)
• Special 3 large moons

• Type Asteroid Belt
• Orbital Radius 1.20 x 10⁹ km (8.05 AU)
• Period 3.59 x 10⁵ hours (41.01 earth years)

• HX-16 I

• Type Large ocean
• Radius 8540.45 km (1.34 x earth)
• Surface Area 9.17 x 10⁸ km²
• Land Area 1.01 x 10⁸ km² (0.68 x earth)
• Mass 1.43 x 10²⁵ kg (2.40 x earth)
• Density 5.50 g/cm³ (1.00 x earth)
• Composition 27.3% iron, 24.1% silicon, 23.9% oxygen, 16.9% titanium, 7.9% other metals, trace other elements

• Gravity 13.07 m/s² (1.34 x earth)
• Escape Velocity 14.94 km/s
• Rotation
• Period 25.83 hours
• Axis Tilt 47.79 °

• Water 90 %
• Ice 1 %

• Type Dense toxic
• Pressure 178.41 kPa (1.76 x earth)
• Composition 83.7% sulfur dioxide, 16.3% oxygen, trace other gases

• Type Standard
• Min Temp 260 K (-12 °C)
• Avg Temp 300 K (27 °C)
• Max Temp 351 K (77 °C)

• Chemistry Carbon
• Lifeforms Prokaryotic microbes

• 4 small moons, advanced alien artifact