1736 Floirac

{{Short description|Stony Florian asteroid}} {{Use dmy dates|date=October 2019}} {{Infobox planet | minorplanet = yes | name = 1736 Floirac | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = <ref name="jpldata" /> | discovered = 6 September 1967 | discoverer = G. Soulié | discovery_site = Bordeaux Obs. | mpc_name = (1736) Floirac | alt_names = 1967 RA{{·}}1927 RB 1927 SN{{·}}1934 XC 1937 RP{{·}}{{mp|1952 DO|1}} 1957 TC{{·}}1957 US 1962 CN{{·}}A914 WD | named_after = Floirac, Gironde {{small|(location of observatory)}}<ref name="springer" /> | mp_category = main-belt{{·}}Flora<ref name="lcdb" /> | orbit_ref = <ref name="jpldata" /> | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 89.65 yr (32,745 days) | aphelion = 2.6074 AU | perihelion = 1.8500 AU | semimajor = 2.2287 AU | eccentricity = 0.1699 | period = 3.33 yr (1,215 days) | mean_anomaly = 331.80° | inclination = 4.5502° | asc_node = 159.80° | arg_peri = 248.92° | dimensions = {{val|8.617|0.075}}<ref name="Masiero-2014" /> {{val|8.701|0.119}} km<ref name="WISE" /> {{val|8.729}} km<ref name="Pravec-2012b" /> 8.73 km {{small|(taken)}}<ref name="lcdb" /> {{val|9.50|0.30}} km<ref name="Masiero-2012" /> {{val|10.08|0.34}} km<ref name="AKARI" /> | rotation = {{val|6.775|0.001}} h{{efn|name=LCDB-Pravec-2007}}{{efn|name=lightcurve-plot}} {{val|12.28|0.06}} h<ref name="geneva-obs" /> | albedo = {{val|0.252|0.020}}<ref name="AKARI" /> {{val|0.258|0.060}}<ref name="Masiero-2012" /> {{val|0.2711|}}<ref name="Pravec-2012b" /> {{val|0.2994|0.0420}}<ref name="WISE" /> {{val|0.302|0.021}}<ref name="Masiero-2014" /> | spectral_type = S<ref name="lcdb" /><ref name="Veres-2015" /> | abs_magnitude = {{val|11.84|0.07}} {{small|(R)}}{{efn|name=LCDB-Pravec-2007}}{{·}}12.20<ref name="AKARI" /><ref name="Masiero-2012" />{{·}}12.24<ref name="WISE" />{{·}}{{val|12.33|0.086}}<ref name="lcdb" /><ref name="Pravec-2012b" />{{·}}12.4<ref name="jpldata" />{{·}}{{val|12.44|0.33}}<ref name="Veres-2015" /> }}

'''1736 Floirac''', provisional designation {{mp|1967 RA}}, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8.7 kilometer in diameter.

It was discovered on 6 September 1967, by French astronomer Guy Soulié at Bordeaux Observatory in southwestern France, who named it after the French town of Floirac.<ref name="springer" /><ref name="MPC-Floirac" />

== Classification and orbit ==

''Floirac'' is a member of the Flora family. It orbits the Sun at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,215 days). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic.<ref name="jpldata" />

First observed as {{mp|A914 WD}} at Simeiz Observatory in 1914, the body's observation arc begins with its 1927-identification as {{mp|1927 RB}} at Heidelberg Observatory, approximately 40 years prior to its official discovery observation at Bordeaux.<ref name="MPC-Floirac" />

== Physical characteristics ==

This asteroid has been characterized as a stony S-type asteroid by PanSTARRS{{'}} photometric survey.<ref name="Veres-2015" />

=== Lightcurves ===

In October 2007, a rotational lightcurve of ''Floirac'' was obtained from photometric observations by astronomer Petr Pravec and collaborating colleges. Lightcurve analysis gave a rotation period of 6.775 hours with a low brightness variation of 0.08 magnitude ({{small|U=3}}).{{efn|name=LCDB-Pravec-2007}}{{efn|name=lightcurve-plot}} An alternative period solution of 12.28 hours (Δmag 0.25) was found by French amateur astronomer Laurent Bernasconi in June 2006 ({{small|U=2}}).<ref name="geneva-obs" />

=== 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, ''Floirac'' measures between 8.617 and 10.08 kilometers in diameter and its surface has an albedo of 0.252 and 0.302.<ref name="Masiero-2014" /><ref name="WISE" /><ref name="Masiero-2012" /><ref name="AKARI" />

The ''Collaborative Asteroid Lightcurve Link'' takes an albedo of 0.2711 and a diameter of 8.73 kilometers with an absolute magnitude of 12.4, based on Petr Pravec's revised WISE-data.<ref name="lcdb" /><ref name="Pravec-2012b" />

== Naming ==

This minor planet was named by the discoverer for Floirac, a French town in the Département Gironde, near Bordeaux, where the discovering observatory is located.<ref name="springer" /> The official {{MoMP|1736|naming citation}} was published by the Minor Planet Center on 15 July 1968 ({{small|M.P.C. 2883}}).<ref name="DoMP-Circular-dates" />

== Notes == {{notelist|refs=

{{efn|name=LCDB-Pravec-2007|1=Pravec (2007) web: rotation period {{val|6.775|0.001}} hours with a brightness amplitude of {{val|0.08}} mag. Quality Code is 3. Summary figures at [https://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1736%7CFloirac Collaborative Asteroid Lightcurve Link (CALL) for (1736) Floirac] and [http://www.asu.cas.cz/~ppravec/neo.htm Pravec, P.; Wolf, M.; Sarounova, L. (2007)] }}

{{efn|name=lightcurve-plot|1=[http://www.asu.cas.cz/~asteroid/01736.png Lightcurve plot] of 1736 Floirac by Higgins and Pravec, from [http://www.asu.cas.cz/~ppravec/newres.htm Ondrejov data] obtained by the NEO Photometric Program and collaborating projects }}

}}

== References == {{reflist|30em|refs=

<ref name="jpldata">{{cite web |type = 2017-04-26 last obs. |title = JPL Small-Body Database Browser: 1736 Floirac (1967 RA) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001736 |publisher = Jet Propulsion Laboratory |accessdate = 7 June 2017}}</ref>

<ref name="springer">{{cite book |title = Dictionary of Minor Planet Names – (1736) Floirac |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 138 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1737 |chapter = (1736) Floirac }}</ref>

<ref name="MPC-Floirac">{{cite web |title = 1736 Floirac (1967 RA) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1736 |accessdate = 21 December 2016}}</ref>

<ref name="DoMP-Circular-dates">{{cite book |title = Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) |year = 2009 |url = https://archive.org/details/dictionaryminorp2008schm |url-access = limited |chapter = Appendix – Publication Dates of the MPCs |last = Schmadel |first=Lutz D. |publisher = Springer Berlin Heidelberg |page = [https://archive.org/details/dictionaryminorp2008schm/page/n230 221] |isbn = 978-3-642-01964-7 |doi = 10.1007/978-3-642-01965-4}}</ref>

<ref name="geneva-obs">{{cite web |title = Asteroids and comets rotation curves – (1736) Floirac |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = https://obswww.unige.ch/~behrend/page4cou.html#001736 |accessdate = 21 December 2016}}</ref>

<ref name="lcdb">{{cite LCDB|number = 1736 |accessdate = 21 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= }} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=1736 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="Pravec-2012b">{{Cite journal |first1 = Petr |last1 = Pravec |first2 = Alan W. |last2 = Harris |first3 = Peter |last3 = Kusnirák |first4 = Adrián |last4 = Galád |first5 = Kamil |last5 = Hornoch |date = September 2012 |title = Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations |url = https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P |journal = Icarus |volume = 221 |issue = 1 |pages = 365–387 |bibcode = 2012Icar..221..365P |doi = 10.1016/j.icarus.2012.07.026 |access-date= 21 December 2016|hdl= 11104/0217021 |hdl-access= free }}</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= 21 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= 21 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= 21 December 2016}}</ref>

}}

== 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 * [https://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|1736}} * {{JPL small body}}

{{DEFAULTSORT:Floirac}} 001736 Category:Discoveries by Guy Soulié Category:Named minor planets 19670906