# 1736 Floirac

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> Source revision: 1346057009
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{{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](/source/Guy_Souli%C3%A9)
 | discovery_site  = [Bordeaux Obs.](/source/Bordeaux_Observatory)
 | mpc_name        = (1736) Floirac
 | alt_names       = 1967 RA{{·}}1927 RB<br />1927 SN{{·}}1934 XC<br />1937 RP{{·}}{{mp|1952 DO|1}}<br />1957 TC{{·}}1957 US<br />1962 CN{{·}}A914 WD
 | named_after     = [Floirac, Gironde](/source/Floirac%2C_Gironde)<br />{{small|(location of observatory)}}<ref name="springer" />
 | mp_category     = [main-belt](/source/main-belt){{·}}[Flora](/source/Flora_family)<ref name="lcdb" />
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 4 September 2017 ([JD](/source/Julian_day) 2458000.5)
 | uncertainty     = 0
 | observation_arc = 89.65 yr (32,745 days)
 | aphelion        = 2.6074 [AU](/source/Astronomical_unit)
 | perihelion      = 1.8500 AU
 | semimajor       = 2.2287 AU
 | eccentricity    = 0.1699
 | period          = 3.33 [yr](/source/Julian_year_(astronomy)) (1,215 days)
 | mean_anomaly    = 331.80[°](/source/Degree_(angle))
 | inclination     = 4.5502°
 | asc_node        = 159.80°
 | arg_peri        = 248.92°
 | dimensions      = {{val|8.617|0.075}}<ref name="Masiero-2014" /><br />{{val|8.701|0.119}} km<ref name="WISE" /><br />{{val|8.729}} km<ref name="Pravec-2012b" /><br />8.73 km {{small|(taken)}}<ref name="lcdb" /><br />{{val|9.50|0.30}} km<ref name="Masiero-2012" /><br />{{val|10.08|0.34}} km<ref name="AKARI" />
 | rotation        = {{val|6.775|0.001}} [h](/source/Hour){{efn|name=LCDB-Pravec-2007}}{{efn|name=lightcurve-plot}}<br />{{val|12.28|0.06}} h<ref name="geneva-obs" />
 | albedo          = {{val|0.252|0.020}}<ref name="AKARI" /><br />{{val|0.258|0.060}}<ref name="Masiero-2012" /><br />{{val|0.2711|}}<ref name="Pravec-2012b" /><br />{{val|0.2994|0.0420}}<ref name="WISE" /><br />{{val|0.302|0.021}}<ref name="Masiero-2014" />
 | spectral_type   = [S](/source/S-type_asteroid)<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](/source/asteroid) from the inner regions of the [asteroid belt](/source/asteroid_belt), approximately 8.7 kilometer in diameter.

It was discovered on 6 September 1967, by French astronomer [Guy Soulié](/source/Guy_Souli%C3%A9) at [Bordeaux Observatory](/source/Bordeaux_Observatory) in southwestern France, who named it after the French town of [Floirac](/source/Floirac%2C_Gironde).<ref name="springer" /><ref name="MPC-Floirac" />

== Classification and orbit ==

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

First observed as {{mp|A914 WD}} at [Simeiz Observatory](/source/Simeiz_Observatory) in 1914, the body's [observation arc](/source/observation_arc) begins with its 1927-identification as {{mp|1927 RB}} at [Heidelberg Observatory](/source/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](/source/S-type_asteroid) by [PanSTARRS](/source/PanSTARRS){{'}} photometric survey.<ref name="Veres-2015" />

=== Lightcurves ===

In October 2007, a rotational [lightcurve](/source/lightcurve) of ''Floirac'' was obtained from photometric observations by astronomer [Petr Pravec](/source/Petr_Pravec) and collaborating colleges. Lightcurve analysis gave a [rotation period](/source/rotation_period) of 6.775 hours with a low brightness variation of 0.08 [magnitude](/source/Magnitude_(astronomy)) ({{small|[U=3](/source/LCDB_quality_code)}}).{{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](/source/Laurent_Bernasconi) in June 2006 ({{small|[U=2](/source/LCDB_quality_code)}}).<ref name="geneva-obs" />

=== 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, ''Floirac'' measures between 8.617 and 10.08 kilometers in diameter and its surface has an [albedo](/source/astronomical_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](/source/absolute_magnitude) of 12.4, based on [Petr Pravec](/source/Petr_Pravec)'s revised WISE-data.<ref name="lcdb" /><ref name="Pravec-2012b" />

== Naming ==

This [minor planet](/source/minor_planet) was named by the discoverer for [Floirac](/source/Floirac%2C_Gironde), 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](/source/Minor_Planet_Center) on 15 July 1968 ({{small|[M.P.C.](/source/Minor_Planet_Circulars) 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 }}

}} <!-- end of notelist -->

== 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](/source/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](/source/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](/source/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>

}} <!-- 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
* [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}}

{{Minor planets navigator |1735 ITA |number=1736 |1737 Severny}}
{{Small Solar System bodies}}
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{{DEFAULTSORT:Floirac}}
001736
Category:Discoveries by Guy Soulié
Category:Named minor planets
19670906

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Adapted from the Wikipedia article [1736 Floirac](https://en.wikipedia.org/wiki/1736_Floirac) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/1736_Floirac?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.