| J121131 I |  Barren | 1 | 3,550 km | 221°C | 0.29g | 1.219 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| J121131 I - Moon 1 | 210 km | -184°C | 0g | 3.0 × 10¹⁹ kg | 182,294,004 km |
|
| J121131 II |  Oceanic | 3 | 2,750 km | 81°C | 0.18g | 1.984 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| J121131 II - Moon 1 | 140 km | -203°C | 0g | 5.9 × 10¹⁸ kg | 296,819,065 km | | J121131 II - Moon 2 | 410 km | -203°C | 0.01g | 2.3 × 10²⁰ kg | 296,819,065 km | | J121131 II - Moon 3 | 150 km | -203°C | 0g | 7.4 × 10¹⁸ kg | 296,819,065 km |
|
| J121131 III | Oceanic | 0 | 2,890 km | 81°C | 0.4g | 2.194 AU |
| J121131 IV | Barren | 2 | 3,450 km | 233°C | 0.29g | 2.511 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| J121131 IV - Moon 1 | 250 km | -211°C | 0g | 4.2 × 10¹⁹ kg | 375,657,988 km | | J121131 IV - Moon 2 | 240 km | -211°C | 0g | 3.6 × 10¹⁹ kg | 375,657,988 km |
|
| J121131 V | Barren | 0 | 3,980 km | 184°C | 0.33g | 3.619 AU |
| J121131 VI |  Temperate | 1 | 6,550 km | 23°C | 0.61g | 5.781 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| J121131 VI - Moon 1 | 340 km | -232°C | 0.01g | 9.1 × 10¹⁹ kg | 864,886,981 km |
|