1536 Pielinen: Difference between revisions
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{{efn|name=LCDB-Pravec-2011|1=Pravec (2011) web: rotation period {{val|66.22}} hours with a brightness amplitude of {{val|0.85}} mag. Quality Code: 3. Summary figures at {{URL|1=http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1536%7CPielinen |2=Collaborative Asteroid Lightcurve Link (CALL) for (1536) Pielinen}}}} |
{{efn|name=LCDB-Pravec-2011|1=Pravec (2011) web: rotation period {{val|66.22}} hours with a brightness amplitude of {{val|0.85}} mag. Quality Code: 3. Summary figures at {{URL|1=http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1536%7CPielinen |2=Collaborative Asteroid Lightcurve Link (CALL) for (1536) Pielinen}}}} |
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{{efn|name=IMG-Light-Curve-Analysis|1={{URL|1=http://www.asu.cas.cz/~asteroid/01536.png|2=Lightcurve plot for (1536) Pielinen}} by Petr Pravec of the Ondrejov Asteroid Photometry Project ({{URL|1=http://www.asu.cas.cz/~ppravec/newres.txt|2=source data}}) |
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{{efn|name=LCDB-Stephens-2011|1= |
{{efn|name=LCDB-Stephens-2011|1=Stephens (2011) web. Observations in September 2011, gave a rotation period of {{val|66.34|0.02}} hours with a brightness amplitude of {{val|0.80}} mag. Quality Code of 3-. Summary figures at {{URL|1=http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1536%7CPielinen |2=Collaborative Asteroid Lightcurve Link (CALL) for (1536) Pielinen}}}} |
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Revision as of 21:07, 3 April 2017
| Discovery [1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 18 September 1939 |
| Designations | |
| (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 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 112.71 yr (41,167 days) |
| Aphelion | 2.6345 AU |
| Perihelion | 1.7742 AU |
| 2.2044 AU | |
| Eccentricity | 0.1951 |
| 3.27 yr (1,195 days) | |
| 235.66° | |
| 0° 18m 3.96s / day | |
| Inclination | 1.5342° |
| 195.69° | |
| 170.71° | |
| Physical characteristics | |
| Dimensions | 7.38±1.62 km[4] 7.82 km (calculated)[3] 7.934±0.037 km[5] 7.975±0.109 km[6] |
| 66.1±0.1 h[7] 66.22 h[a] 66.34±0.02 h[b] 67.43±0.06 h[8] | |
| 0.24 (assumed)[3] 0.253±0.017[6] 0.2557±0.0662[5] 0.30±0.21[4] | |
| S [3][9] | |
| 12.57±0.52[9] · 12.6[5] · 12.7[1][3][4] | |
1536 Pielinen, provisional designation 1939 SE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter. It was discovered on 18 September 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory, Southwest Finland.[10] It was later named for Finnish lake Pielinen.[2]
Classification and orbit
Pielinen 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 has an eccentricity of 0.20 and an inclination of 2° with respect to the ecliptic.[1] Pielinen was first identified as A903 SF at Heidelberg in 1903, extending the body's observation arc by 36 years prior to its official discovery observation.[10]
Lightcurves
From September to November 2011, four rotational lightcurves of Pielinen were obtained from photometric observations. One lightcurve analysis gave a rotation period of 66.2 hours,[c] which is significantly longer than for most minor planets, that spin every 2 to 20 hours around their axis. However, slow rotators have periods typically above 100 hours. Photometric observations were taken by Petr Pravec (66.22 hours, Δ0.85 mag, U=3),[a] Robert D. Stephens (66.34 hours, Δ0.80 mag, U=3-),[b] Giovanni Casalnuovo (66.1 hours, Δ0.75 mag, U=2+),[7] and Silvano Casulli (67.43 hours, Δ0.81 mag, U=2).[8]
Diameter and albedo
According to the space-based survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Pielinen measures between 7.38 and 7.975 kilometers in diameter and its surface has an albedo between 0.253 and 0.30.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this family – and calculates a diameter of 7.82 kilometers, using an absolute magnitude of 12.7.[3]
Naming
This 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] Naming citation was published before November 1977 (M.P.C. 3930).[11]
Notes
- ^ a b Pravec (2011) web: rotation period 66.22 hours with a brightness amplitude of 0.85 mag. Quality Code: 3. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1536) Pielinen
- ^ a b Stephens (2011) web. Observations in September 2011, gave a rotation period of 66.34±0.02 hours with a brightness amplitude of 0.80 mag. Quality Code of 3-. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1536) Pielinen
- ^ Lightcurve plot for (1536) Pielinen by Petr Pravec of the Ondrejov Asteroid Photometry Project (source data)
References
- ^ a b c d "JPL Small-Body Database Browser: 1536 Pielinen (1939 SE)" (2016-06-16 last obs.). Jet Propulsion Laboratory. Retrieved 30 December 2016.
- ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1536) Pielinen. Springer Berlin Heidelberg. p. 122. ISBN 978-3-540-00238-3. Retrieved 30 December 2016.
- ^ a b c d e f "LCDB Data for (1536) Pielinen". Asteroid Lightcurve Database (LCDB). Retrieved 30 December 2016.
- ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 30 December 2016.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 30 December 2016.
- ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 30 December 2016.
- ^ a b Casalnuovo, Giovanni Battista (April 2016). "Lightcurve Analysis for Nine Main Belt Asteroids". The Minor Planet Bulletin. 43 (2): 112–115. Bibcode:2016MPBu...43..112C. ISSN 1052-8091. Retrieved 30 December 2016.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1536) Pielinen". Geneva Observatory. Retrieved 30 December 2016.
- ^ a b Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 30 December 2016.
- ^ a b "1536 Pielinen (1939 SE)". Minor Planet Center. Retrieved 30 December 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 30 December 2016.
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
