UX-4 is not considered a “notable” system but it does contain a secret base on its crappy terrestrial world, UX-4 I.

M9 V Red Dwarf

• Radius 2.69 x 10⁵ km (0.39 x sol)
• Mass 5.37 x 10²⁹ kg (0.27 x sol)
• Temperature 2000 K
• Luminosity 1.28 x 10²⁵ W (0.03 x sol)

• Terrestrial World
• Orbital Radius 2.98 x 10⁷ km (0.20 AU)
• Period 1.49 x 10³ hours (0.17 earth years)
• Physics Large iron/silicate
• Hydrosphere 36 % water, 29 % ice
• Atmosphere Dense toxic
• Biosphere Microbes, algae
• Pirate/Smuggler Base
• Electromagnetic storms

See UX-4 I

• Rock Planet
• Orbital Radius 5.13 x 10⁷ km (0.34 AU)
• Period 3.38 x 10³ hours (0.39 earth years)
• Gravity 11.95 m/s² (1.22 x earth)
• 2 small moons

• Rock Planet
• Orbital Radius 7.61 x 10⁷ km (0.51 AU)
• Period 6.10 x 10³ hours (0.70 earth years)
• Gravity 8.43 m/s² (0.86 x earth)
• Planetary rings

• Rock Planet
• Orbital Radius 1.23 x 10⁸ km (0.82 AU)
• Period 1.25 x 10⁴ hours (1.43 earth years)
• Gravity 6.20 m/s² (0.63 x earth)
• Wreckage of a crashed starship

Ice Planet

• Orbital Radius 2.07 x 10⁸ km (1.38 AU)
• Period 2.74 x 10⁴ hours (3.13 earth years)
• Gravity 9.11 m/s² (0.93 x earth)
• Wreckage of a crashed starship

Ice Planet

• Orbital Radius 3.69 x 10⁸ km (2.47 AU)
• Period 6.51 x 10⁴ hours (7.45 earth years)
• Gravity 11.19 m/s² (1.14 x earth)
• Planetary rings

Ice Planet

• Orbital Radius 7.65 x 10⁸ km (5.11 AU)
• Period 1.94 x 10⁵ hours (22.23 earth years)
• Gravity 6.31 m/s² (0.64 x earth)