1568 Aisleen
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Light curve-based 3D-model of 568 Aisleen
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| Discovery [1] | |
|---|---|
| Discovered by | E. L. Johnson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 21 August 1946 |
| Designations | |
| MPC designation | 1568 Aisleen |
|
Named after
|
Aisleen Johnson (discoverer's wife)[2] |
| 1946 QB | |
| main-belt · Phocaea [3][4] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 69.22 yr (25,283 days) |
| Aphelion | 2.9494 AU |
| Perihelion | 1.7541 AU |
| 2.3517 AU | |
| Eccentricity | 0.2541 |
| 3.61 yr (1,317 days) | |
| 3.5389° | |
| Inclination | 24.896° |
| 146.24° | |
| 228.72° | |
| Physical characteristics | |
| Dimensions | 14.04±0.96 km[5] 11.983±0.072 km[6] 12.67 km (caculated)[3] |
| 6.683±0.005 h[7] 6.68±0.02 h[8] 6.67597±0.00005 h[9] |
|
| 0.130±0.019[5] 0.1793±0.0322[6] 0.23 (assumed)[3] |
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| S [3] | |
| 11.7[1] | |
1568 Aisleen, provisional designation 1946 QB, is a stony asteroid from the inner regions of the asteroid belt, about 13 kilometers in diameter. It was discovered on 21 August 1946, by South African astronomer Ernest Johnson at the Union Observatory in Johannesburg, South Africa.[10]
The S-type asteroid is a member of the Phocaea family, a group of asteroids with similar orbital characteristics.[4] It orbits the Sun at a distance of 1.8–2.9 AU once every 3 years and 7 months (1,317 days). Its orbit shows an eccentricity of 0.25 and is tilted by 25 degrees to the plane of the ecliptic.[1]
Based upon a light-curve generated from 2001 observations, it has a rotational period of 6.68±0.02 hours during which the brightness varies by 6.68±0.05 in magnitude.[8] More recent observations confirmed the body's period.[7][9] It has an albedo of 0.13 and 0.19, according to the surveys carried out by the Japanese Akari satellite and the U.S. Wide-field Infrared Survey Explorer with its NEOWISE mission, respectively, while the Collaborative Asteroid Lightcurve Link assumes an albeo of 0.23, a more typical value for stony asteroids and identical to the asteroid family's namesake and most massive member, 25 Phocaea.[3][5][6]
The discoverer named the asteroid after his wife, Aisleen Johnson.[2][11]
References
- ↑ 1.0 1.1 1.2 1.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 3.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 6.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 9.0 9.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 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 (1)-(5000) – Minor Planet Center
- 1568 Aisleen at the JPL Small-Body Database
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