| U-FQ21 I |  Barren | 0 | 3,010 km | 39°C | 0.18g | 1.003 AU |
| U-FQ21 II | Barren | 1 | 3,480 km | -73°C | 0.65g | 1.695 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| U-FQ21 II - Moon 1 | 250 km | -201°C | 0g | 4.6 × 10¹⁹ kg | 484,727 km |
|
| U-FQ21 III |  Temperate | 0 | 4,030 km | 33°C | 0.21g | 2.727 AU |
| U-FQ21 IV |  Storm | 2 | 7,250 km | 3°C | 0.9g | 4.523 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| U-FQ21 IV - Moon 1 | 200 km | -229°C | 0g | 1.5 × 10¹⁹ kg | 56,084 km | | U-FQ21 IV - Moon 2 | 1,140 km | -229°C | 0.03g | 5.7 × 10²¹ kg | 700,596 km |
|
| U-FQ21 V |  Oceanic | 1 | 3,050 km | 81°C | 0.22g | 7.244 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| U-FQ21 V - Moon 1 | 270 km | -238°C | 0g | 4.0 × 10¹⁹ kg | 493,622 km |
|