(8273) Apatheia Main-belt Asteroid
Discovered on 29 November 1989 by Akiyama, M., Furuta, T. at Susono.
Apatheia is a philosophical word that means “an immovable soul” in Greek philosophy. The name was proposed by the first discoverer following a suggestion by children who come to the Hakone Youth Center.Naming citation (20000320/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Apatheia is today
Seen from above the solar system on 2026-10-14: Apatheia is 2.88 au from the Sun and 2.23 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 8273 |
| Provisional designation | 1989 WB2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.77 km (#11,074 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.315 |
| Absolute magnitude (H) | 13.62 |
| Orbital period | 4.21 years |
| Semi-major axis | 2.61 au |
| Perihelion – aphelion | 1.99 – 3.22 au |
| Eccentricity | 0.236 |
| Inclination | 5.03° |
| Closest distance between its orbit and Earth's (MOID) | 1.01 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 29 November 1989
- (4382) Stravinsky
- (5740) Toutoumi
- (5910) Zatopek
- (8011) Saijokeiichi
- (8087) Kazutaka
- (15248) Hidekazu
- (15716) Narahara
- (26828) Narusawa
- (29167) Masataka