21558 Alisonliu
| Discovery [1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | MRO |
| Discovery date | 24 August 1998 |
| Designations | |
| MPC designation | 21558 Alisonliu |
|
Named after
|
Alison Lui (Winner 2006 ISEF)[2] |
| 1998 QW77 · 1992 CX | |
| main-belt · Eunomia [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 23.79 yr (8,689 days) |
| Aphelion | 3.1115 AU |
| Perihelion | 2.2375 AU |
| 2.6745 AU | |
| Eccentricity | 0.1633 |
| 4.37 yr (1,598 days) | |
| 29.284° | |
| Inclination | 11.958° |
| 323.46° | |
| 288.42° | |
| Physical characteristics | |
| Dimensions | 8.812±0.068 km[4] 8.36 km (calculated)[3] |
| 4.866 h[5] | |
| 0.2287±0.0326[4] 0.21 (assumed)[3] |
|
| S [3] | |
| 12.7[1] | |
21558 Alisonliu, provisional designation 1998 QW77, is a stony asteroid from the middle region of the asteroid belt, about 8 kilometers in diameter. It was discovered by the Lincoln Near-Earth Asteroid Research at the U.S. Magdalena Ridge Observatory in Socorro, New Mexico, on 24 August 1998.[6]
The asteroid is a member of the Eunomia family, a large group of S-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun at a distance of 2.2–3.1 AU once every 4 years and 4 months (1,598 days). Its orbit shows an eccentricity of 0.16 and is tilted by 12 degrees to the plane of the ecliptic. It has a rotation period of 4.9 hours[5] and an albedo of 0.23, according to the survey carried out by the space-based NEOWISE mission of the Wide-field Infrared Survey Explorer.[4]
The minor planet was named after Alison Liu (b. 1989) who was awarded Intel Best of Category in the 2006 Intel International Science and Engineering Fair for her behavioral and social science team project. She also received the EU Contest for Young Scientists Award. At the time, Liu attended the Manhasset Secondary School in the U.S. state of New York.[2]
References
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- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (20001)-(25000) – Minor Planet Center
- 21558 Alisonliu at the JPL Small-Body Database
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