HX-12 is one of the twenty systems charted by Taisa Hanako while she commanded the YSS Elfin Princess in YE 30. In YE 35, she returned to the system while in command of the YSS Eucharis.

• Type G0 V Yellow Main Sequence
• Radius 8.07 x 10⁵ km (1.16 x sol)
• Mass 2.56 x 10³⁰ kg (1.29 x sol)
• Temperature 5900 K
• Luminosity 4.58 x 10²⁶ W (1.20 x sol)

• Type Asteroid Belt
• Orbital Radius 6.15 x 10⁷ km (0.41 AU)
• Period 2.03 x 10³ hours (0.23 earth years)

• Type Terrestrial World
• Orbital Radius 1.28 x 10⁸ km (0.85 AU)
• Period 6.06 x 10³ hours (0.69 earth years)
• Physics Large iron/silicate
• Hydrosphere 11 % water, 1 % ice
• Atmosphere Dense toxic
• Biosphere Microbes, fungi
• Special Wreckage of a crashed starship

See: HX-12 II

• Type Terrestrial World
• Orbital Radius 1.69 x 10⁸ km (1.13 AU)
• Period 9.25 x 10³ hours (1.06 earth years)
• Physics Standard iron/silicate
• Hydrosphere 0 % water, 14 % ice
• Atmosphere Thin reducing
• Biosphere None Detected
• Special Heavy volcanism

See: HX-12 III

• Type Rock Planet
• Orbital Radius 2.86 x 10⁸ km (1.91 AU)
• Period 2.03 x 10⁴ hours (2.33 earth years)
• Gravity 5.28 m/s² (0.54 x earth)
• Special Advanced alien artifact, planetary rings

• Type Rock Planet
• Orbital Radius 5.82 x 10⁸ km (3.89 AU)
• Period 5.91 x 10⁴ hours (6.76 earth years)
• Gravity 7.80 m/s² (0.80 x earth)

• Type Asteroid Belt
• Orbital Radius 1.07 x 10⁹ km (7.14 AU)
• Period 1.47 x 10⁵ hours (16.79 earth years)