(21398) Zengguoshou Main-belt Asteroid
Discovered on 20 March 1998 by LINEAR at Socorro.
Zeng Guoshou (b. 1944), a 2003 Intel International Science and Engineering Fair Excellence in Teaching Award finalist, is a teacher at the First Middle School of Xiamen, Fujian, China.Naming citation (20041226/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Zengguoshou is today
Seen from above the solar system on 2026-10-14: Zengguoshou is 1.87 au from the Sun and 0.900 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21398 |
| Provisional designation | 1998 FX55 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.58 |
| Orbital period | 3.34 years |
| Semi-major axis | 2.23 au |
| Perihelion – aphelion | 1.86 – 2.60 au |
| Eccentricity | 0.166 |
| Inclination | 3.61° |
| Closest distance between its orbit and Earth's (MOID) | 0.870 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