1524 Joensuu
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Observatory |
| Discovery date | 18 September 1939 |
| Designations | |
| MPC designation | 1524 Joensuu |
|
Named after
|
Joensuu (Finnish town)[2] |
| 1939 SB · 1931 EL 1933 QO · 1936 DG 1958 DH1 |
|
| main-belt · (outer) [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.61 yr (30,903 days) |
| Aphelion | 3.4885 AU |
| Perihelion | 2.7305 AU |
| 3.1095 AU | |
| Eccentricity | 0.1218 |
| 5.48 yr (2,003 days) | |
| 304.68° | |
| Inclination | 12.687° |
| 347.72° | |
| 3.0114° | |
| Physical characteristics | |
| Dimensions | 42.79 km[4] 44.87±0.78 km[5] 49.394±0.502 km[6] 45.06±0.29 km[7] 42.87 km (derived)[3] |
| 9.276 h[8] | |
| 0.0462[4] 0.043±0.002[5] 0.0347±0.0053[6] 0.050±0.008[7] 0.0553 (derived)[3] |
|
| C [3] | |
| 10.7[1] | |
1524 Joensuu, provisional designation 1939 SB, is a carbonaceous asteroid from the outer region of the asteroid belt, about 43 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland, on 18 September 1939.[9]
The dark C-type asteroid orbits the Sun at a distance of 2.7–3.5 AU once every 5 years and 6 months (2,003 days). Its orbit shows an eccentricity of 0.12 and is tilted by 13 degrees to the plane of the ecliptic. It has a rotation period of 9.3 hours[8] and an albedo in the range of 0.03 to 0.06, according to the surveys carried out by IRAS, Akari, WISE and NEOWISE.[4][5][6][7]
The minor planet was named for the Finnish town Joensuu, where the discoverer received his early schooling. It is located in North Karelia, near the Russian border.[2]
References
- ↑ 1.0 1.1 1.2 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 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 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 7.2 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.
- ↑ 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
- 1524 Joensuu at the JPL Small-Body Database
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