(21390) Shindo Main-belt Asteroid
Discovered on 20 March 1998 by LINEAR at Socorro.
Shindo Akihiko (b. 1960), a 2004 Intel International Science and Engineering Fair Excellence in Teaching Award finalist, is a teacher at the Okayama Ichinomiya Senior High School, Souja, Okayama, Japan.Naming citation (20041226/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Shindo is today
Seen from above the solar system on 2026-10-14: Shindo is 2.81 au from the Sun and 2.90 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21390 |
| Provisional designation | 1998 FV28 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.34 km (#14,368 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.251 |
| Absolute magnitude (H) | 14.79 |
| Orbital period | 3.88 years |
| Semi-major axis | 2.47 au |
| Perihelion – aphelion | 2.12 – 2.82 au |
| Eccentricity | 0.141 |
| Inclination | 1.88° |
| Closest distance between its orbit and Earth's (MOID) | 1.14 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 20 March 1998
- (8744) Cilla
- (8745) Delaney
- (8954) Baral
- (9126) Samcoulson
- (9243) Alag
- (9454) Ardeishar
- (11169) Alkon
- (11170) Bradenmilford
- (11173) Jayanderson
- (11174) Carandrews
- (11176) Batth
- (11685) Adamcurry