(21672) Laichunju Main-belt Asteroid
Discovered on 7 September 1999 by LINEAR at Socorro.
Lai Chun-Ju (b. 1986) was awarded second place in the 2005 Intel International Science and Engineering Fair for his mathematics project. He attends the Taipei Municipal Chien-Kuo Senior High School, Taipei City, Chinese Taipei.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Laichunju is today
Seen from above the solar system on 2026-10-14: Laichunju is 3.04 au from the Sun and 3.95 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21672 |
| Provisional designation | 1999 RK14 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.79 km (#13,229 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.162 |
| Absolute magnitude (H) | 14.7 |
| Orbital period | 4.08 years |
| Semi-major axis | 2.55 au |
| Perihelion – aphelion | 2.06 – 3.04 au |
| Eccentricity | 0.192 |
| Inclination | 8.09° |
| Closest distance between its orbit and Earth's (MOID) | 1.08 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Lai
All asteroids named after someone called Lai
Also discovered on 7 September 1999
- (12126) Chersidamas
- (12577) Samra
- (12578) Bensaur
- (12585) Katschwarz
- (12586) Juliaspeyer
- (12588) Arseneau
- (12604) Lisatate
- (12924) Madisonicole
- (13818) Ullery
- (14214) Hirsch
- (15503) Estradioto
- (16067) Brandonfan