1536 Pielinen

Pielinen is a member of the Flora family, a large group of stony S-type asteroids. It orbits the Sun in the inner main-belt 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. Pielinen was first identified as {{mp|A903 SF}} at Heidelberg in 1903, extending the body's observation arc by 36 years prior to its official discovery observation.

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,{{efn|name=IMG-Light-Curve-Analysis}} 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, {{small|U=3}}),{{efn|name=LCDB-Pravec-2011}} Robert D. Stephens (66.34 hours, Δ0.80 mag, {{small|U=3-}}),{{efn|name=LCDB-Stephens-2011}} Giovanni Casalnuovo (66.1 hours, Δ0.75 mag, {{small|U=2+}}), and Silvano Casulli (67.43 hours, Δ0.81 mag, {{small|U=2}}).

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. 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, with an absolute magnitude of 12.7.

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. The official {{MoMP|1536|naming citation}} was published by the Minor Planet Center on 20 February 1976 ({{small|M.P.C. 3930}}).

{{notelist|refs=

{{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 for (1536) Pielinen at [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1536%7CPielinen Collaborative Asteroid Lightcurve Link (CALL)]}}

{{efn|name=IMG-Light-Curve-Analysis|1=[http://www.asu.cas.cz/~asteroid/01536.png Lightcurve plot for (1536) Pielinen] by Petr Pravec of the Ondrejov Asteroid Photometry Project [http://www.asu.cas.cz/~ppravec/newres.txt source data])

}}

{{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 for (1536) Pielinen at [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1536%7CPielinen Collaborative Asteroid Lightcurve Link (CALL)]}}

}}

{{reflist|30em|refs=

{{cite web

|type = 2017-06-05 last obs.

|title = JPL Small-Body Database Browser: 1536 Pielinen (1939 SE)

|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001536

|publisher = Jet Propulsion Laboratory

|accessdate = 30 June 2017}}

{{cite book

|title = Dictionary of Minor Planet Names – (1536) Pielinen

|last = Schmadel | first = Lutz D.

|publisher = Springer Berlin Heidelberg

|page = 122

|date = 2007

|isbn = 978-3-540-00238-3

|doi = 10.1007/978-3-540-29925-7_1537 |chapter = (1536) Pielinen }}

{{cite web

|title = 1536 Pielinen (1939 SE)

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1536

|accessdate = 30 December 2016}}

{{cite book

|title = Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008)

|chapter = Appendix – Publication Dates of the MPCs

|last = Schmadel |first=Lutz D.

|publisher = Springer Berlin Heidelberg

|page = 221

|isbn = 978-3-642-01964-7

|doi = 10.1007/978-3-642-01965-4}}

{{cite web

|title = Asteroids and comets rotation curves – (1536) Pielinen

|last = Behrend |first = Raoul

|publisher = Geneva Observatory

|url = http://obswww.unige.ch/~behrend/page4cou.html#001536

|accessdate = 30 December 2016}}

{{cite journal

|display-authors = 6

|first1 = Joseph R. |last1 = Masiero

|first2 = T. |last2 = Grav

|first3 = A. K. |last3 = Mainzer

|first4 = C. R. |last4 = Nugent

|first5 = J. M. |last5 = Bauer

|first6 = R. |last6 = Stevenson

|first7 = S. |last7 = Sonnett

|date = August 2014

|title = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos

|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M

|journal = The Astrophysical Journal

|volume = 791

|issue = 2

|page = 11

|bibcode = 2014ApJ...791..121M

|doi = 10.1088/0004-637X/791/2/121

|arxiv = 1406.6645

|access-date= 30 December 2016}}

{{cite web

|title = LCDB Data for (1536) Pielinen

|publisher = Asteroid Lightcurve Database (LCDB)

|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1536%7CPielinen

|accessdate = 30 December 2016}}

{{cite journal

|display-authors = 6

|first1 = A. |last1 = Mainzer

|first2 = T. |last2 = Grav

|first3 = J. |last3 = Masiero

|first4 = E. |last4 = Hand

|first5 = J. |last5 = Bauer

|first6 = D. |last6 = Tholen

|first7 = R. S. |last7 = McMillan

|first8 = T. |last8 = Spahr

|first9 = R. M. |last9 = Cutri

|first10 = E. |last10 = Wright

|first11 = J. |last11 = Watkins

|first12 = W. |last12 = Mo

|first13 = C. |last13 = Maleszewski

|date = November 2011

|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results

|journal = The Astrophysical Journal

|volume = 741

|issue = 2

|page = 25

|bibcode = 2011ApJ...741...90M

|doi = 10.1088/0004-637X/741/2/90

|arxiv = 1109.6407}}

{{cite journal

|display-authors = 6

|first1 = C. R. |last1 = Nugent

|first2 = A. |last2 = Mainzer

|first3 = J. |last3 = Masiero

|first4 = J. |last4 = Bauer

|first5 = R. M. |last5 = Cutri

|first6 = T. |last6 = Grav

|first7 = E. |last7 = Kramer

|first8 = S. |last8 = Sonnett

|first9 = R. |last9 = Stevenson

|first10 = E. L. |last10 = Wright

|date = December 2015

|title = NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos

|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N

|journal = The Astrophysical Journal

|volume = 814

|issue = 2

|page = 13

|bibcode = 2015ApJ...814..117N

|doi = 10.1088/0004-637X/814/2/117

|arxiv = 1509.02522

|access-date= 30 December 2016}}

{{Cite journal

|author = Casalnuovo, Giovanni Battista

|date = April 2016

|title = Lightcurve Analysis for Nine Main Belt Asteroids

|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..112C

|journal = The Minor Planet Bulletin

|volume = 43

|issue = 2

|pages = 112–115

|issn = 1052-8091

|bibcode = 2016MPBu...43..112C

|access-date= 30 December 2016}}

{{cite journal

|display-authors = 6

|first1 = Peter |last1 = Veres

|first2 = Robert |last2 = Jedicke

|first3 = Alan |last3 = Fitzsimmons

|first4 = Larry |last4 = Denneau

|first5 = Mikael |last5 = Granvik

|first6 = Bryce |last6 = Bolin

|first7 = Serge |last7 = Chastel

|first8 = Richard J. |last8 = Wainscoat

|first9 = William S. |last9 = Burgett

|first10 = Kenneth C. |last10 = Chambers

|first11 = Heather |last11 = Flewelling

|first12 = Nick |last12 = Kaiser

|first13 = Eugen A. |last13 = Magnier

|first14 = Jeff S. |last14 = Morgan

|first15 = Paul A. |last15 = Price

|first16 = John L. |last16 = Tonry

|first17 = Christopher |last17 = Waters

|date = November 2015

|title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results

|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V

|journal = Icarus

|volume = 261

|pages = 34–47

|bibcode = 2015Icar..261...34V

|doi = 10.1016/j.icarus.2015.08.007

|arxiv = 1506.00762

|access-date= 30 December 2016}}

}}

• [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
• [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
• [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
• [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
• {{AstDys|1536}}
• {{JPL small body}}

{{Minor planets navigator |1535 Päijänne |number=1536 |1537 Transylvania}}

{{Small Solar System bodies}}

{{Authority control}}

{{DEFAULTSORT:Pielinen}}

001536

Category:Discoveries by Yrjö Väisälä

Category:Named minor planets

19390918