6223 Dahl

Dahl orbits the Sun in the central main-belt at a distance of 2.4–3.1 AU once every 4 years and 6 months (1,653 days). Its orbit has an eccentricity of 0.12 and an inclination of 4° with respect to the ecliptic. The first precovery was taken at the US Goethe Link Observatory in 1949, extending the asteroid's observation arc by 31 years prior to its discovery.

Dahl has been characterised as a dark, carbonaceous C-type asteroid.

In November 2011, a rotational lightcurve of Dahl was obtained by Brett Waller at the Cedar Green Observatory in Virginia in the United States. It gave a rotation period of {{val|3.33|0.01}} hours with a brightness variation of 0.43 in magnitude ({{small|U=2}}).

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Dahl measures 19.6 kilometres in diameter and its surface has a low albedo of 0.034, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 16.8 kilometres, as the higher the albedo (reflectivity), the lower a body's diameter for certain absolute magnitude.

This minor planet was named in memory of the Welsh author Roald Dahl (1916–1990), known for his classic children's books Willy Wonka and the Chocolate Factory and James and the Giant Peach. The approved naming citation was published by the Minor Planet Center on 28 August 1996 ({{small|M.P.C. 27735}}).

{{reflist|refs=

{{cite web

|type = 2016-12-21 last obs.

|title = JPL Small-Body Database Browser: 6223 Dahl (1980 RD1)

|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006223

|publisher = Jet Propulsion Laboratory

|access-date = 21 June 2017}}

{{cite book

|title = Dictionary of Minor Planet Names – (6223) Dahl

|last = Schmadel | first = Lutz D.

|publisher = Springer Berlin Heidelberg

|page = 519

|date = 2007

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

|doi = 10.1007/978-3-540-29925-7_5731 |chapter = (6223) Dahl }}

{{cite web

|title = 6223 Dahl (1980 RD1)

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=6223

|access-date = 10 July 2016}}

{{cite web

|title = MPC/MPO/MPS Archive

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html

|access-date = 10 July 2016}}

{{cite web

|title = LCDB Data for (6223) Dahl

|publisher = Asteroid Lightcurve Database (LCDB)

|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=6223%7CDahl

|access-date = 10 July 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

|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M

|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

|s2cid = 35447010 |access-date= 10 July 2016}}

{{cite journal

|first = E. Brett |last = Waller

|date = April 2013

|title = Lightcurve Photometry and Rotational Periods of 2890 Vilyujsk and 6223 Dahl

|url = http://articles.adsabs.harvard.edu/full/2013MPBu...40..109W

|journal = The Minor Planet Bulletin

|volume = 40

|issue = 2

|pages = 109–110

|bibcode = 2013MPBu...40..109W

|access-date= 10 July 2016}}

{{cite journal

|display-authors = 6

|first1 = Joseph R. |last1 = Masiero

|first2 = A. K. |last2 = Mainzer

|first3 = T. |last3 = Grav

|first4 = J. M. |last4 = Bauer

|first5 = R. M. |last5 = Cutri

|first6 = J. |last6 = Dailey

|first7 = P. R. M. |last7 = Eisenhardt

|first8 = R. S. |last8 = McMillan

|first9 = T. B. |last9 = Spahr

|first10 = M. F. |last10 = Skrutskie

|first11 = D. |last11 = Tholen

|first12 = R. G. |last12 = Walker

|first13 = E. L. |last13 = Wright

|first14 = E. |last14 = DeBaun

|first15 = D. |last15 = Elsbury

|first16 = T. IV |last16 = Gautier

|first17 = S. |last17 = Gomillion

|first18 = A. |last18 = Wilkins

|date = November 2011

|title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters

|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M

|journal = The Astrophysical Journal

|volume = 741

|issue = 2

|page = 20

|bibcode = 2011ApJ...741...68M

|doi = 10.1088/0004-637X/741/2/68

|arxiv = 1109.4096

|s2cid = 118745497 |access-date= 5 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/NumberedMPs005001.html Discovery Circumstances: Numbered Minor Planets (5001)-(10000)] – Minor Planet Center
• {{AstDys|6223}}
• {{JPL small body}}

{{Minor planets navigator |(6222) 1980 PB3 |number=6223 |6224 El Goresy}}

{{Small Solar System bodies}}

{{Authority control}}

{{DEFAULTSORT:Dahl}}

006223

Category:Discoveries by Antonín Mrkos

Category:Named minor planets

6223 Dahl

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