20403 Attenborough
Main-belt minor planet
- Designation
- (20403) Attenborough
- Class
- Main-belt
- Semi-major axis
- 2.9774865 AU
- Eccentricity
- 0.0911237
- Inclination
- 11.66431°
- Absolute magnitude (H)
- 13.57
- Perihelion
- 2.706 AU
- Aphelion
- 3.249 AU
Main-belt minor planet