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| mp_category = [[main-belt]]{{·}}[[Flora family|Flora]]&thinsp;<ref name="lcdb" />
| mp_category = [[main-belt]]{{·}}[[Flora family|Flora]]&thinsp;<ref name="lcdb" />
| orbit_ref = &thinsp;<ref name="jpldata" />
| orbit_ref = &thinsp;<ref name="jpldata" />
| epoch = 27 June 2015 ([[Julian day|JD]] 2457200.5)
| epoch = 31 July 2016 ([[Julian day|JD]] 2457600.5)
| uncertainty = 0
| uncertainty = 0
| observation_arc = {{nowrap|112.06 yr (40,930 days)}}
| observation_arc = 112.55 yr (41109 days)
| aphelion = 2.6336 [[Astronomical unit|AU]]
| aphelion = {{Convert|2.6348|AU|Gm|abbr=on|lk=on}}
| perihelion = 1.7741 AU
| perihelion = {{Convert|1.7755|AU|Gm|abbr=on}}
| semimajor = 2.2039 AU
| semimajor = {{Convert|2.2051|AU|Gm|abbr=on}}
| eccentricity = 0.1949
| eccentricity = 0.19485
| period = 3.27 [[Julian year (astronomy)|yr]] (1,195 days)
| period = 3.27 [[Julian year (astronomy)|yr]] (1196.1 [[Julian year (astronomy)|d]])
| mean_anomaly = 55.431[[degree (angle)|°]]
| mean_anomaly = 175.60[[Degree (angle)|°]]
| inclination = 1.5311°
| inclination = 1.5328°
| asc_node = 195.74°
| asc_node = 195.68°
| arg_peri = 170.31°
| arg_peri = 170.60°
| dimensions = {{val|7.934|0.037}} km<ref name="WISE" /><br />7.82 km {{small|(calculated)}}<ref name="lcdb" />
| dimensions = {{val|7.934|0.037}} km<ref name="WISE" /><br />7.82 km {{small|(calculated)}}<ref name="lcdb" />
| rotation = 66.22 [[hour|h]]{{efn|name=lcdb}}<br />{{val|66.34|0.02}} h{{efn|name=lcdb}}<br />{{val|67.43|0.06}} h<ref name="geneva-obs" />
| rotation = {{Convert|66.22|h|d|abbr=on|lk=on}}{{efn|name=lcdb}}<ref name="jpldata"/><br />{{val|66.34|0.02}} h{{efn|name=lcdb}}<br />{{val|67.43|0.06}} h<ref name="geneva-obs" />
| albedo = {{val|0.2557|0.0662}}<ref name="WISE" /><br />0.24 {{small|(assumed)}}<ref name="lcdb" />
| albedo = {{val|0.2557|0.0662}}<ref name="WISE" /><br />0.24 {{small|(assumed)}}<ref name="lcdb" />
| spectral_type = [[S-type asteroid|S]]&thinsp;<ref name="lcdb" />
| spectral_type = [[S-type asteroid|S]]&thinsp;<ref name="lcdb" />
| abs_magnitude = 12.7
| abs_magnitude = 12.7
| mean_motion = {{Deg2DMS|0.30099|sup=ms}} / day
| moid = {{Convert|0.772805|AU|Gm|abbr=on}}
| jupiter_moid = {{Convert|2.81861|AU|Gm|abbr=on}}
| tisserand = 3.636
}}
}}


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|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001536
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001536
|publisher=Jet Propulsion Laboratory
|publisher=Jet Propulsion Laboratory
|accessdate=November 2015}}</ref>
|accessdate=27 April 2016}}</ref>


<ref name="springer">{{cite book
<ref name="springer">{{cite book

Revision as of 15:36, 27 April 2016

1536 Pielinen
Discovery [1]
Discovered byY. Väisälä
Discovery siteTurku Observatory
Discovery date18 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 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc112.55 yr (41109 days)
Aphelion2.6348 AU (394.16 Gm)
Perihelion1.7755 AU (265.61 Gm)
2.2051 AU (329.88 Gm)
Eccentricity0.19485
3.27 yr (1196.1 d)
175.60°
0° 18m 3.564s / day
Inclination1.5328°
195.68°
170.60°
Earth MOID0.772805 AU (115.6100 Gm)
Jupiter MOID2.81861 AU (421.658 Gm)
TJupiter3.636
Physical characteristics
Dimensions7.934±0.037 km[4]
7.82 km (calculated)[3]
66.22 h (2.759 d)[a][1]
66.34±0.02 h[a]
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.[a][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. ^ a b c 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. ^ a b c "JPL Small-Body Database Browser: 1536 Pielinen (1939 SE)" (2015-10-23 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
  2. ^ a b 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. {{cite book}}: Check date values in: |accessdate= (help)
  3. ^ a b c d e "LCDB Data for (1536) Pielinen". Asteroid Lightcurve Database (LCDB). Retrieved November 2015. {{cite web}}: Check date values in: |accessdate= (help)
  4. ^ a b c 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. {{cite journal}}: Check date values in: |access-date= (help)
  5. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1536) Pielinen". Geneva Observatory. Retrieved November 2015. {{cite web}}: Check date values in: |accessdate= (help)
  6. ^ "1536 Pielinen (1939 SE)". Minor Planet Center. Retrieved November 2015. {{cite web}}: Check date values in: |accessdate= (help)


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