(21558) Alisonliu Main-belt Asteroid
Discovered on 24 August 1998 by LINEAR at Socorro.
Alison W. Liu (b. 1989) was awarded first place and Best in Category in the 2006 Intel International Science and Engineering Fair for her behavioral and social sciences team project. She also received the EU Contest for Young Scientists Award. She attends the Manhasset High School, Manhasset, New York, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Alisonliu is today
Seen from above the solar system on 2026-10-14: Alisonliu is 2.94 au from the Sun and 3.21 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21558 |
| Provisional designation | 1998 QW77 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.67 km (#8,033 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.245 |
| Rotation period | 4.87 hours |
| Absolute magnitude (H) | 12.8 |
| Orbital period | 4.38 years |
| Semi-major axis | 2.68 au |
| Perihelion – aphelion | 2.24 – 3.11 au |
| Eccentricity | 0.162 |
| Inclination | 12.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.26 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Alison
All asteroids named after someone called Alison
Also discovered on 24 August 1998
- (9808) Navamijain
- (15008) Delahodde
- (15009) Johnwheeler
- (16961) Mullahy
- (18737) Aliciaworley
- (20405) Barryburke
- (20411) Jooyeongeem
- (20412) Josemariamadiedo
- (21554) Leechaohsi
- (21555) Levary
- (21556) Christineli
- (21557) Daniellitt