| J150921 I |  Barren | 0 | 2,070 km | -97°C | 0.15g | 0.372 AU |
| J150921 II | Barren | 0 | 2,230 km | -131°C | 0.15g | 0.566 AU |
| J150921 III |  Lava | 0 | 2,020 km | 1075°C | 0.25g | 0.92 AU |
| J150921 IV |  Temperate | 2 | 5,640 km | 24°C | 0.76g | 1.612 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| J150921 IV - Moon 1 | 230 km | -189°C | 0g | 3.8 × 10¹⁹ kg | 241,207,460 km | | J150921 IV - Moon 2 | 150 km | -189°C | 0g | 9.2 × 10¹⁸ kg | 241,207,460 km |
|
| J150921 V | Barren | 0 | 2,240 km | 4°C | 0.29g | 2.851 AU |
| J150921 VI | Temperate | 1 | 6,150 km | 10°C | 0.62g | 3.617 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| J150921 VI - Moon 1 | 760 km | -217°C | 0.02g | 1.7 × 10²¹ kg | 541,069,279 km |
|
| J150921 VII | Barren | 3 | 9,580 km | 16°C | 0.81g | 6.254 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| J150921 VII - Moon 1 | 150 km | -230°C | 0g | 6.0 × 10¹⁸ kg | 935,591,346 km | | J150921 VII - Moon 2 | 270 km | -230°C | 0g | 4.5 × 10¹⁹ kg | 935,591,346 km | | J150921 VII - Moon 3 | 1,460 km | -230°C | 0.04g | 1.3 × 10²² kg | 935,591,346 km |
|
| J150921 VIII | Lava | 2 | 9,020 km | 761°C | 1.3g | 11.068 AU |
| Moon | Radius | Temp | Gravity | Mass | Distance |
|---|
| J150921 VIII - Moon 1 | 260 km | -241°C | 0g | 3.4 × 10¹⁹ kg | 1,655,816,585 km | | J150921 VIII - Moon 2 | 1,310 km | -241°C | 0.03g | 7.8 × 10²¹ kg | 1,655,816,585 km |
|