1020 Arcadia
{{Use dmy dates|date=March 2018}}
{{Infobox planet
| minorplanet = yes
| name = 1020 Arcadia
| background = #D6D6D6
| image =
| image_size =
| caption =
| discoverer = K. Reinmuth
| discovery_site = Heidelberg Obs.
| discovered = 7 March 1924
| mpc_name = (1020) Arcadia
| alt_names = 1924 QV{{·}}{{mp|1954 UA|2}}
1975 EQ{{·}}{{mp|1977 QO|2}}
| pronounced = {{IPAc-en|ɑr|ˈ|k|eɪ|d|i|ə}}{{OED|Arcadian}}
| named_after = {{nowrap|Arcadia {{small|(Greek region)}}}}
| mp_category = main-belt{{·}}{{small|(middle)}}
Agnia
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 93.89 yr (34,293 d)
| aphelion = 2.9152 AU
| perihelion = 2.6666 AU
| semimajor = 2.7909 AU
| eccentricity = 0.0445
| period = 4.66 yr (1,703 d)
| mean_anomaly = 18.189°
| mean_motion = {{Deg2DMS|0.2114|sup=ms}} / day
| inclination = 4.0598°
| asc_node = 180.71°
| arg_peri = 37.691°
| mean_diameter = {{val|10.067|0.090|ul=km}}
{{val|10.415|0.123|u=km}}
{{val|13.02|0.49|u=km}}
{{val|21.16|u=km}} {{small|(calculated)}}
| rotation = {{val|17.02|0.02|ul=h}}
| albedo = 0.057 {{small|(assumed)}}
{{val|0.150|0.023}}
{{val|0.2364|0.0456}}
| spectral_type = SMASS {{=}} S{{·}}S
S{{small|(SDSS-MFB)}}
| abs_magnitude = 12.0{{·}}12.10
{{val|12.29|0.11}}
}}
1020 Arcadia, provisional designation {{mp|1924 QV}}, is a stony Agnia asteroid from the central regions of the asteroid belt, approximately {{convert|11|km|mi|abbr=off|sigfig=1|sp=us}} in diameter. It was discovered on 7 March 1924, by German astronomer Karl Reinmuth at the Heidelberg Observatory in Heidelberg, Germany. The asteroid was named after the Greek region of Arcadia.
Orbit and classification
Arcadia is a member of the Agnia family ({{small|514}}), a very large family of stony asteroids with more than 2000 known members. They most likely formed from the breakup of a basalt object, which in turn was spawned from a larger parent body that underwent igneous differentiation. The family's parent body and namesake is the asteroid 847 Agnia.
It orbits the Sun in the central main-belt at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,703 days; semi-major axis of 2.79 AU). Its orbit has an eccentricity of 0.04 and an inclination of 4° with respect to the ecliptic. The body's observation arc begins at Heidelberg in March 1924, six days after its official discovery observation.
Physical characteristics
In the SMASS classification, Arcadia is a common, stony S-type asteroid. It has been characterized as an S-type by Pan-STARRS photometric survey, as well as by SDSS-MFB (Masi Foglia Bus).
= Rotation period =
In November 2011, a fragmentary rotational lightcurve of Arcadia was obtained from photometric observations by Gordon Gartrelle at the University of North Dakota. Lightcurve analysis gave a rotation period of 17.02 hours with a brightness amplitude of 0.05 magnitude ({{small|U=1}}). As of 2018, no secure period has been obtained.
= Diameter and albedo =
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Arcadia measures between 10.067 and 13.02 kilometers in diameter and its surface has an albedo between 0.150 and 0.2364. The Collaborative Asteroid Lightcurve Link assumes an albedo 0.057, i.e. an albedo for a carbonaceous rather than for a stony asteroid, and consequently calculates a much larger diameter of 21.16 kilometers based on an absolute magnitude of 12.1. It may be speculated whether this anomaly is a glitch in the data base.
Naming
This minor planet was named after the Greek region of Arcadia in central Peloponnese. It is also a celebrated mythological region, where the shepherd god Pan lived. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 97}}).
References
{{reflist|30em|refs=
|type = 2018-01-27 last obs.
|title = JPL Small-Body Database Browser: 1020 Arcadia (1924 QV)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001020
|publisher = Jet Propulsion Laboratory
|access-date = 8 March 2018}}
|last = Schmadel | first = Lutz D.
|title = Dictionary of Minor Planet Names |publisher = Springer Berlin Heidelberg
|page = 88
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_1021 |chapter = (1020) Arcadia }}
|title = 1020 Arcadia (1924 QV)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1020
|access-date = 8 March 2018}}
|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
|access-date= 8 March 2018}}
|title = Asteroid 1020 Arcadia – Nesvorny HCM Asteroid Families V3.0
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1020+Arcadia
|access-date = 24 October 2019}}
|first1 = D. |last1 = Nesvorný
|first2 = M. |last2 = Broz
|first3 = V. |last3 = Carruba
|date = December 2014
|chapter = Identification and Dynamical Properties of Asteroid Families
|title = Asteroids IV
|pages = 297–321
|bibcode = 2015aste.book..297N
|doi = 10.2458/azu_uapress_9780816532131-ch016
|arxiv = 1502.01628
|isbn = 978-0-8165-3213-1}}
|first1 = Jessica M. |last1 = Sunshine
|first2 = Schelte J. |last2 = Bus
|first3 = Timothy J. |last3 = McCoy
|first4 = Thomas H. |last4 = Burbine
|first5 = Catherine M. |last5 = Corrigan
|first6 = Richard P. |last6 = Binzel
|date = August 2004
|title = High-calcium pyroxene as an indicator of igneous differentiation in asteroids and meteorites
|url = https://www.researchgate.net/publication/228936637
|journal = Meteoritics and Planetary Science
|volume = 39
|issue = 8
|pages = 1343–1357
|bibcode = 2004M&PS...39.1343S
|doi = 10.1111/j.1945-5100.2004.tb00950.x
|access-date= 8 March 2018|doi-access=
}}
|title = LCDB Data for (1020) Arcadia
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1020%7CArcadia
|access-date = 8 March 2018}}
|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 = C. |last6 = Nugent
|first7 = M. S. |last7 = Cabrera
|date = November 2012
|title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M
|journal = The Astrophysical Journal Letters
|volume = 759
|issue = 1
|page = 5
|bibcode = 2012ApJ...759L...8M
|doi = 10.1088/2041-8205/759/1/L8
|arxiv = 1209.5794
|access-date= 8 March 2018}}
|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}}
|author = Gartrelle, Gordon M.
|date = April 2012
|title = Lightcurve Results for Eleven Asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...40G
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|volume = 39
|issue = 2
|pages = 40–46
|issn = 1052-8091
|bibcode = 2012MPBu...39...40G
|access-date= 8 March 2018}}
|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
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|volume = 261
|pages = 34–47
|bibcode = 2015Icar..261...34V
|doi = 10.1016/j.icarus.2015.08.007
|arxiv = 1506.00762
|access-date= 8 March 2018}}
}}
External links
- [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|1020}}
- {{JPL small body}}
{{Minor planets navigator |1019 Strackea |number=1020 |1021 Flammario}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Arcadia}}