(21554) Leechaohsi Main-belt Asteroid
Discovered on 24 August 1998 by LINEAR at Socorro.
Lee Chao-Hsi (b. 1987) was awarded first place in the 2006 Intel International Science and Engineering Fair for his engineering team project. He attends the Taipei Municipal LiShan High School, Taipei, Taiwan, Chinese Taipei.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Leechaohsi is today
Seen from above the solar system on 2026-10-14: Leechaohsi is 3.31 au from the Sun and 2.39 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21554 |
| Provisional designation | 1998 QR69 |
| Orbit class | Main-belt Asteroid |
| Diameter | 15.2 km (#3,098 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0400 |
| Rotation period | 6.32 hours |
| Absolute magnitude (H) | 13.33 |
| Orbital period | 5.53 years |
| Semi-major axis | 3.13 au |
| Perihelion – aphelion | 2.46 – 3.80 au |
| Eccentricity | 0.215 |
| Inclination | 15.6° |
| 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 named after someone called Lee
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- (18124) Leeperry
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- (33550) Blackburn
- (34576) Leeshangjung
- (94228) Leesuikwan
- (110073) Leeonki
All asteroids named after someone called Lee
Also discovered on 24 August 1998
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- (21555) Levary
- (21556) Christineli
- (21557) Daniellitt
- (21558) Alisonliu