(14308) Hardeman Main-belt Asteroid
Discovered on 16 October 1977 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Sjoerd Hardeman (1982-2011) was a member of the Jongeren WerkGroep voor sterrenkunde (Dutch Youth Association for astronomy). He was a leader on several astronomy holiday camps and gave many presentations on astronomy. He died from leukemia shortly before defending his PhD.Naming citation (MPC batch dated 2018-10-26), IAU / Minor Planet Center, via NASA/JPL
Where Hardeman is today
Seen from above the solar system on 2026-10-14: Hardeman is 2.99 au from the Sun and 3.52 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 14308 |
| Provisional designation | 5193 T-3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.60 km (#5,344 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.159 |
| Absolute magnitude (H) | 13.03 |
| Orbital period | 5.23 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.42 – 3.60 au |
| Eccentricity | 0.197 |
| Inclination | 12.5° |
| Closest distance between its orbit and Earth's (MOID) | 1.45 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 16 October 1977
- (3798) de Jager
- (3936) Elst
- (4044) Erikhog
- (4108) Rakos
- (4722) Agelaos
- (4753) Phidias
- (4754) Panthoos
- (5610) Balster
- (5699) Munch
- (5700) Homerus
- (5984) Lysippus
- (6055) Brunelleschi