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Category

1. Inner System (8)
2. Outer System (22)
3. Trans-Neptunian region (12)

Type

1. Star (1)
2. Planet (8)
3. Dwarf planet (5)
4. Moon (21)
5. Asteroid (2)
6. TNO (6)

Satellites

1. Has satellites (12)
2. Has rings (5)

Orbit

1. Prograde (41)
2. Retrograde (1)

Rotation

1. Direct (20)
2. Synchronous (20)
3. Retrograde (3)

Magnetosphere

1. Intrinsic (9)
2. Induced (2)

Atmosphere

1. Stable (9)
2. Trace (11)

Shape

1. Equilibrium spheroid (32)

Geological activity

1. Is active (7)
2. In the past (15)

Hydrosphere

1. External (1)
2. Internal (4)

Diameter/Size

1. More than 400 km (43)
2. 100 to 400 km (18)
3. Less than 100 km (51)