(21825) Zhangyizhong Main-belt Asteroid
Discovered on 2 October 1999 by LINEAR at Socorro.
Zhang Yizhong (b. 1986) was awarded second place in the 2005 Intel International Science and Engineering Fair for his computer science project. He attends the Kongjiang Senior High School, Shanghai, China.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Zhangyizhong is today
Seen from above the solar system on 2026-10-14: Zhangyizhong is 2.66 au from the Sun and 2.42 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21825 |
| Provisional designation | 1999 TR88 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.81 km (#9,210 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0350 |
| Absolute magnitude (H) | 15.03 |
| Orbital period | 3.74 years |
| Semi-major axis | 2.41 au |
| Perihelion – aphelion | 2.00 – 2.82 au |
| Eccentricity | 0.169 |
| Inclination | 1.56° |
| Closest distance between its orbit and Earth's (MOID) | 0.987 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 2 October 1999
- (12929) Periboea
- (12935) Zhengzhemin
- (13406) Sekora
- (16087) Rhythmgarg
- (16094) Scottmccord
- (20629) Robert
- (20631) Stefuller
- (20632) Carlyrosser
- (20633) Robertluther
- (20634) Marichardson
- (20635) Robinandrews
- (20636) Romanhirsch