{{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 | discovery_ref = <ref name="jpldata" /> | discovered = 18 August 1933 | discoverer = E. Delporte | discovery_site = Uccle Obs. | 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{{·}}Koronis<ref name="lcdb" /> | orbit_ref = <ref name="jpldata" /> | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 83.47 yr (30,486 days) | aphelion = 3.0019 AU | perihelion = 2.7407 AU | semimajor = 2.8713 AU | eccentricity = 0.0455 | period = 4.87 yr (1,777 days) | mean_anomaly = 138.35° | 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 {{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 = S<ref name="jpldata" />{{·}}S<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'': {{mp|1933 QD}}) is a stony Koronis asteroid from the outer region of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 18 August 1933, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle, Belgium.<ref name="MPC-Delvaux" /> It was later named after astronomer Georges Roland's sister-in-law.<ref name="springer" />
== Orbit and classification ==
Delvaux is a stony asteroid and a member of the Koronis family, a collisional group consisting of a few hundred known bodies with nearly ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,777 days). Its orbit has an eccentricity of 0.05 and an inclination of 1° with respect to the ecliptic.<ref name="jpldata" /> First identified as {{mp|A912 FA}} at 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 taxonomy, Delvaux is a common S-type asteroid.<ref name="springer" />
=== Rotation period ===
It has a well-determined rotation period of 3.63 to 3.65 hours with a brightness variation of 0.57–0.69 magnitude ({{small|U=3/3/3/3}}).<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 satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Delvaux measures between 16.66 and 17.51 kilometers in diameter, and its surface has an 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 of 11.0.<ref name="lcdb" />
== Name ==
This 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.<ref name="springer" /> The approved naming citation was published by the Minor Planet Center on 8 April 1982 ({{small|M.P.C. 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 |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 |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 |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