639670 2017 HK21
Main-belt minor planet
- Designation
- (639670) 2017 HK21
- Class
- Main-belt
- Semi-major axis
- 2.7885064 AU
- Eccentricity
- 0.1140206
- Inclination
- 12.10224°
- Absolute magnitude (H)
- 16.71
- Perihelion
- 2.471 AU
- Aphelion
- 3.106 AU
Main-belt minor planet