1536 Pielinen
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Observatory |
| Discovery date | 18 September 1939 |
| Designations | |
| MPC designation | 1536 Pielinen |
|
Named after
|
Pielinen (lake)[2] |
| 1939 SE · 1929 RZ 1931 ED · 1934 CW 1939 TP · 1939 UK 1952 RW · A903 SF A916 RA |
|
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 112.06 yr (40,930 days) |
| Aphelion | 2.6336 AU |
| Perihelion | 1.7741 AU |
| 2.2039 AU | |
| Eccentricity | 0.1949 |
| 3.27 yr (1,195 days) | |
| 55.431° | |
| Inclination | 1.5311° |
| 195.74° | |
| 170.31° | |
| Physical characteristics | |
| Dimensions | 7.934±0.037 km[4] 7.82 km (calculated)[3] |
| 66.22 h[lower-alpha 1] 66.34±0.02 h[lower-alpha 1] 67.43±0.06 h[5] |
|
| 0.2557±0.0662[4] 0.24 (assumed)[3] |
|
| S [3] | |
| 12.7 | |
1536 Pielinen, provisional designation 1939 SE, is a stony asteroid from the inner regions of the asteroid belt, about 8 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory, Southwest Finland, on 18 September 1939.[6]
The asteroid is a member of the Flora family, a large group of stony S-type asteroids in the inner main-belt. It orbits the Sun at a distance of 1.8–2.6 AU once every 3 years and 3 months (1,195 days). Its orbit shows an eccentricity of 0.19 and is tilted by 2 degrees to the plane of the ecliptic. Its relatively long rotation period of 66 to 67 hours has been measured several times.[lower-alpha 1][5] Based on the survey carried out by the WISE/NEOWISE mission, it has an albedo of 0.26.[4] The Collaborative Asteroid Lightcurve Link (CALL) assumes a similar value of 0.24.[3]
The minor planet is named after Pielinen, Finland's fourth largest lake in Finnish Karelia. The Koli National Park is located on its western shores.[2]
References
- ↑ 1.0 1.1 1.2 Pravec (2011) web: rotation period 66.22 hours with a brightness amplitude of 0.85 mag, and Stephens (2011) web: rotation period 66.34±0.02 hours with a brightness amplitude of 0.8 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1536) Pielinen
- ↑ 1.0 1.1 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 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 (1)-(5000) – Minor Planet Center
- 1536 Pielinen at the JPL Small-Body Database
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