# 1848 Delvaux

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/1848_Delvaux
> Markdown URL: https://mediated.wiki/source/1848_Delvaux.md
> Source: https://en.wikipedia.org/wiki/1848_Delvaux
> Source revision: 1356584780
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Stony main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
 | minorplanet     = yes
 | name            = 1848 Delvaux
 | background      = #D6D6D6
 | image           = 001848-asteroid shape model (1848) Delvaux.png
 | image_scale      =
 | caption         = Shape model of Delvaux from its [lightcurve](/source/lightcurve)
 | discovery_ref   = <ref name="jpldata" />
 | discovered      = 18 August 1933
 | discoverer      = [E. Delporte](/source/Eug%C3%A8ne_Delporte)
 | discovery_site  = [Uccle Obs.](/source/Royal_Observatory_of_Belgium)
 | mpc_name        = (1848) Delvaux
 | alt_names       = 1933 QD{{·}}1936 DH<br />1948 SF{{·}}1948 SK<br />1951 GV{{·}}1952 ML<br />{{mp|1953 TU|1}}{{·}}{{mp|1953 VE|1}}<br />1956 GL{{·}}1972 QN<br />1975 FV{{·}}A912 FA
 | named_after     = {{small|(sister-in-law of)}}<br />Georges Roland<ref name="springer" />
 | mp_category     = [main-belt](/source/main-belt){{·}}[Koronis](/source/Koronis_family)<ref name="lcdb" />
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 4 September 2017 ([JD](/source/Julian_day) 2458000.5)
 | uncertainty     = 0
 | observation_arc = 83.47 yr (30,486 days)
 | aphelion        = 3.0019 [AU](/source/Astronomical_unit)
 | perihelion      = 2.7407 AU
 | semimajor       = 2.8713 AU
 | eccentricity    = 0.0455
 | period          = 4.87 [yr](/source/Julian_year_(astronomy)) (1,777 days)
 | mean_anomaly    = 138.35[°](/source/Degree_(angle))
 | mean_motion     = {{Deg2DMS|0.2026|sup=ms}} / day
 | inclination     = 1.4404°
 | asc_node        = 331.66°
 | arg_peri        = 316.61°
 | dimensions      = {{val|16.66|1.95}} km<ref name="Masiero-2012" /><br />{{val|17.030|0.114}}<ref name="Masiero-2014" /><br />17.12 km {{small|(calculated)}}<ref name="lcdb" /><br />{{val|17.446|0.143}} km<ref name="WISE" /><br />{{val|17.51|0.63}} km<ref name="AKARI" />
 | rotation        = 3.637 [h](/source/Hour) {{small|(adopted)}}<ref name="lcdb" /><br />{{val|3.638|0.001}} h<ref name="geneva-obs" /><br />{{val|3.639|0.001}} h<ref name="Arredondo-2014" /><br />{{val|3.639|0.001}} h<ref name="Slivan-2008" /><br />{{val|3.65|0.01}} h<ref name="geneva-obs" />
 | albedo          = {{val|0.2329|0.0432}}<ref name="WISE" /><br />0.24 {{small|(assumed)}}<ref name="lcdb" /><br />{{val|0.242|0.036}}<ref name="Masiero-2014" /><br />{{val|0.255|0.020}}<ref name="AKARI" /><br />{{val|0.461|0.316}}<ref name="Masiero-2012" />
 | spectral_type   = [SMASS](/source/SMASS_classification) = [S](/source/S-type_asteroid)<ref name="jpldata" />{{·}}[S](/source/S-type_asteroid)<ref name="lcdb" />
 | abs_magnitude   = 10.35<ref name="Masiero-2012" />{{·}}10.90<ref name="AKARI" />{{·}}11.0<ref name="jpldata" /><ref name="lcdb" /><ref name="WISE" />{{·}}{{val|11.24|0.10}}<ref name="Slivan-2008" />{{·}}{{val|11.26|0.40}}<ref name="Veres-2015" />
}}

'''1848 Delvaux''' ([''prov. designation''](/source/Minor_planet_provisional_designation): {{mp|1933 QD}}) is a stony [Koronis asteroid](/source/Koronis_asteroid) from the outer region of the [asteroid belt](/source/asteroid_belt), approximately 17 kilometers in diameter. It was discovered on 18 August 1933, by Belgian astronomer [Eugène Delporte](/source/Eug%C3%A8ne_Delporte) at the [Royal Observatory of Belgium](/source/Royal_Observatory_of_Belgium) in Uccle, Belgium.<ref name="MPC-Delvaux" /> It was later named after astronomer [Georges Roland](/source/Georges_Roland_(astronomer))'s sister-in-law.<ref name="springer" />

== Orbit and classification ==

Delvaux is a stony asteroid and a member of the [Koronis family](/source/Koronis_family), a collisional group consisting of a few hundred known bodies with nearly [ecliptical orbits](/source/ecliptic). It orbits the Sun in the [outer](/source/Kirkwood_gap) main-belt at a distance of 2.7–3.0&nbsp;[AU](/source/Astronomical_unit) once every 4 years and 10 months (1,777 days). Its orbit has an [eccentricity](/source/orbital_eccentricity) of 0.05 and an [inclination](/source/orbital_inclination) of 1[°](/source/Degree_(angle)) with respect to the ecliptic.<ref name="jpldata" /> First identified as {{mp|A912 FA}} at [Simeiz Observatory](/source/Simeiz_Observatory) in 1912, the body's observation arc begins 3 day after its official discovery, as non of the previous observations were used.<ref name="MPC-Delvaux" />

== Physical characteristics ==

In the [SMASS](/source/SMASS_classification) taxonomy, Delvaux is a common [S-type asteroid](/source/S-type_asteroid).<ref name="springer" />

=== Rotation period ===

It has a well-determined [rotation period](/source/rotation_period) of 3.63 to 3.65 hours with a brightness variation of 0.57–0.69 [magnitude](/source/Magnitude_(astronomy)) ({{small|[U=3/3/3/3](/source/LCDB_quality_code)}}).<ref name="geneva-obs" /><ref name="Arredondo-2014" /><ref name="Slivan-2008" /> The Collaborative Asteroid Lightcurve Link (CALL) adopts a period of 3.637 hours.<ref name="lcdb" />

=== Diameter and albedo ===

According to the surveys carried out by the Japanese [Akari](/source/Akari_(satellite)) satellite and NASA's [Wide-field Infrared Survey Explorer](/source/Wide-field_Infrared_Survey_Explorer) with its subsequent [NEOWISE](/source/NEOWISE) mission, Delvaux measures between 16.66 and 17.51 kilometers in diameter, and its surface has an [albedo](/source/astronomical_albedo) of 0.233 to 0.461.<ref name="Masiero-2012" /><ref name="Masiero-2014" /><ref name="WISE" /><ref name="AKARI" /> CALL assumes a standard albedo for members of the Koronis family of 0.24, and calculates a diameter of 17.12 kilometers with an [absolute magnitude](/source/absolute_magnitude) of 11.0.<ref name="lcdb" />

== Name ==

This [minor planet](/source/minor_planet) was named after the sister-in-law of Georges Roland, astronomer at the observatory in Uccle and known as the co-discoverer of the [comet Arend–Roland](/source/comet_Arend%E2%80%93Roland).<ref name="springer" /> The approved naming citation was published by the [Minor Planet Center](/source/Minor_Planet_Center) on 8 April 1982 ({{small|[M.P.C.](/source/Minor_Planet_Circulars) 6832}}).<ref name="MPC-Circulars-Archive" />

== References ==
<references>

<ref name="jpldata">{{cite web
  |type       = 2017-02-04 last obs.
  |title      = JPL Small-Body Database Browser: 1848 Delvaux (1933 QD)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001848
  |publisher  = [Jet Propulsion Laboratory](/source/Jet_Propulsion_Laboratory)
  |accessdate = 1 July 2017}}</ref>

<ref name="springer">{{cite book
  |title      = Dictionary of Minor Planet Names – (1848) Delvaux
  |last       = Schmadel | first = Lutz D.
  |publisher  = [Springer Berlin Heidelberg](/source/Springer_Berlin_Heidelberg)
  |page       = 148
  |date       = 2007
  |isbn       = 978-3-540-00238-3
  |doi       = 10.1007/978-3-540-29925-7_1849 |chapter       = (1848) Delvaux }}</ref>

<ref name="MPC-Delvaux">{{cite web
  |title      = 1848 Delvaux (1933 QD)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=1848
  |accessdate = 14 December 2016}}</ref>

<ref name="MPC-Circulars-Archive">{{cite web
  |title      = MPC/MPO/MPS Archive
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
  |accessdate = 14 December 2016}}</ref>

<ref name="geneva-obs">{{cite web
  |title      = Asteroids and comets rotation curves – (1848) Delvaux
  |last       = Behrend |first = Raoul
  |publisher  = [Geneva Observatory](/source/Geneva_Observatory)
  |url        = http://obswww.unige.ch/~behrend/page4cou.html#001848
  |accessdate = 14 December 2016}}</ref>

<ref name="lcdb">{{cite LCDB|number = 1848
  |accessdate = 14 December 2016}}</ref>

<ref name="AKARI">{{cite journal
  |display-authors = 6
  |first1     = Fumihiko |last1 = Usui
  |first2     = Daisuke |last2 = Kuroda
  |first3     = Thomas G. |last3 = Müller
  |first4     = Sunao |last4 = Hasegawa
  |first5     = Masateru |last5 = Ishiguro
  |first6     = Takafumi |last6 = Ootsubo
  |first7     = Daisuke |last7 = Ishihara
  |first8     = Hirokazu |last8 = Kataza
  |first9     = Satoshi |last9 = Takita
  |first10    = Shinki |last10 = Oyabu
  |first11    = Munetaka |last11 = Ueno
  |first12    = Hideo |last12 = Matsuhara
  |first13    = Takashi |last13 = Onaka
  |date       = October 2011
  |title      = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey
  |journal    = Publications of the Astronomical Society of Japan
  |volume     = 63
  |issue      = 5
  |pages      = 1117–1138
  |bibcode    = 2011PASJ...63.1117U
  |doi        = 10.1093/pasj/63.5.1117
  |doi-access= free
  }} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=1848 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref>

<ref name="WISE">{{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}}</ref>

<ref name="Masiero-2012">{{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     = 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= 14 December 2016}}</ref>

<ref name="Slivan-2008">{{Cite journal
  |display-authors = 6
  |first1     = Stephen M. |last1 = Slivan
  |first2     = Richard P. |last2 = Binzel
  |first3     = Shaida C. |last3 = Boroumand
  |first4     = Margaret W. |last4 = Pan
  |first5     = Christine M. |last5 = Simpson
  |first6     = James T. |last6 = Tanabe
  |first7     = Rosalinda M. |last7 = Villastrigo
  |first8     = Lesley L. |last8 = Yen
  |first9     = Richard P. |last9 = Ditteon
  |first10    = Donald P. |last10 = Pray
  |first11    = Robert D. |last11 = Stephens
  |date       = May 2008
  |title      = Rotation rates in the Koronis family, complete to H≈11.2
  |url        = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008Icar..195..226S
  |journal    = Icarus
  |volume     = 195
  |issue      = 1
  |pages      = 226–276
  |bibcode    = 2008Icar..195..226S
  |doi        = 10.1016/j.icarus.2007.11.019
  |access-date= 14 December 2016}}</ref>

<ref name="Arredondo-2014">{{Cite journal
  |first1     = Anicia |last1 = Arredondo
  |first2     = Anne-Marie |last2 = Hartt
  |first3     = Sormeh K. |last3 = Yazdi
  |date       = October 2014
  |title      = Rotation Periods and R Magnitudes of Three Koronis Family Members
  |url        = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..252A
  |journal    = The Minor Planet Bulletin
  |volume     = 41
  |issue      = 4
  |pages      = 252–254
  |issn       = 1052-8091
  |bibcode    = 2014MPBu...41..252A
  |access-date= 14 December 2016}}</ref>

<ref name="Veres-2015">{{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= 14 December 2016}}</ref>

<ref name="Masiero-2014">{{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= 14 December 2016}}</ref>

</references> <!-- end of reflist -->

== 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|1848}}
* {{JPL small body}}

{{Minor planets navigator |1847 Stobbe |number=1848 |1849 Kresák}}
{{Small Solar System bodies}}
{{Authority control}}

{{DEFAULTSORT:Delvaux}}
001848
Category:Discoveries by Eugène Joseph Delporte
Category:Named minor planets
001848
19330818

---
Adapted from the Wikipedia article [1848 Delvaux](https://en.wikipedia.org/wiki/1848_Delvaux) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/1848_Delvaux?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.