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 2 3 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 2 "JPL Small-Body Database Browser: 1536 Pielinen (1939 SE)" (2015-10-23 last obs.). Jet Propulsion Laboratory. Retrieved November 2015.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1536) Pielinen. Springer Berlin Heidelberg. p. 122. ISBN 978-3-540-29925-7. Retrieved November 2015.
- 1 2 3 4 5 "LCDB Data for (1536) Pielinen". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
- 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
- 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1536) Pielinen". Geneva Observatory. Retrieved November 2015.
- ↑ "1536 Pielinen (1939 SE)". Minor Planet Center. Retrieved November 2015.
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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