# 3640 Gostin

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> Source revision: 1346052238
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{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=May 2018}}
{{Infobox planet
 | minorplanet     = yes
 | name            = 3640 Gostin
 | background      = #D6D6D6
 | image           = 
 | image_size      = 
 | caption         = 
 | discovery_ref   = <ref name="MPC-object" />
 | discoverer      = [C. Shoemaker](/source/Carolyn_Shoemaker)<br />[E. Shoemaker](/source/Eugene_Shoemaker)
 | discovery_site  = [Palomar Obs.](/source/Palomar_Observatory)
 | discovered      = 11 October 1985
 | mpc_name        = (3640) Gostin
 | alt_names       = {{mp|1985 TR|3}}{{·}}1955 SS<br />1960 CB{{·}}1970 CS<br />{{mp|1972 VJ|1}}
 | pronounced      = 
 | named_after     = [Victor Gostin](/source/Victor_Gostin)<ref name="MPC-object" /><br />{{small|(Australian geologist)}}
 | mp_category     = [main-belt](/source/main-belt)<ref name="MPC-object" /><ref name="jpldata" />{{·}}{{small|([inner](/source/Kirkwood_gap))}}<br />[Flora](/source/Flora_family)<ref name="lcdb" /><ref name="Ferret" />
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 23 March 2018 ([JD](/source/Julian_day) 2458200.5)
 | uncertainty     = 0
 | observation_arc = 61.63 [yr](/source/Julian_year_(astronomy)) (22,511 d)
 | aphelion        = 2.4175 [AU](/source/Astronomical_unit)
 | perihelion      = 2.0311 AU
 | semimajor       = 2.2243 AU
 | eccentricity    = 0.0869
 | period          = 3.32 yr (1,212 d)
 | mean_anomaly    = 224.62[°](/source/Degree_(angle))
 | mean_motion     = {{Deg2DMS|0.2971|sup=ms}} / day
 | inclination     = 4.3118°
 | asc_node        = 289.19°
 | arg_peri        = 155.59°
 | mean_diameter   = {{val|7.148|0.088|ul=km}}<ref name="Masiero-2014" /><br />{{val|7.613|0.096|u=km}}<ref name="WISE" /><br />8.58 km {{small|(calculated)}}<ref name="lcdb" />
 | rotation        = {{val|3.26|0.05|ul=h}}<ref name="Chang-2014a" /><br />{{val|3.263|0.0009|u=h}}<ref name="Waszczak-2015" /><br />{{val|3.263|0.003|u=h}}<ref name="Klinglesmith-2016b" /><br />{{val|3.2641|0.0005|u=h}}<ref name="Albers-2010" />
 | albedo          = {{val|0.2127|0.0446}}<ref name="WISE" /><br />{{val|0.239|0.036}}<ref name="Masiero-2014" /><br />{{val|0.24}} {{small|(assumed)}}<ref name="lcdb" />
 | spectral_type   = [SMASS](/source/SMASS_classification) {{=}} [S](/source/S-type_asteroid)<ref name="jpldata" /><ref name="lcdb" />
 | abs_magnitude   = {{val|12.26|0.14}} {{small|(R)}}<ref name="Chang-2014a" /><br />{{val|12.398|0.001}} {{small|(R)}}<ref name="Waszczak-2015" /><br />12.5<ref name="jpldata" /><ref name="lcdb" /><br />{{val|12.62|0.20}}<ref name="Veres-2015" /><br />12.9<ref name="WISE" />
}}

'''3640 Gostin''', provisional designation {{mp|1985 TR|3}}, is a stony Florian [asteroid](/source/asteroid) from the inner regions of the [asteroid belt](/source/asteroid_belt), approximately {{convert|8|km|mi|abbr=off|sigfig=1|sp=us}} in diameter. It was discovered on 11 October 1985, by American astronomer couple [Carolyn](/source/Carolyn_Shoemaker) and [Eugene Shoemaker](/source/Eugene_Shoemaker) at the [Palomar Observatory](/source/Palomar_Observatory) in California.<ref name="MPC-object" /> The [S-type asteroid](/source/S-type_asteroid) has a [rotation period](/source/rotation_period) of 3.26 hours.<ref name="lcdb" /> It was named for Australian geologist [Victor Gostin](/source/Victor_Gostin).<ref name="MPC-object" />

== Orbit and classification ==

''Gostin'' is a member of the [Gondolatsch](/source/1562_Gondolatsch)-cluster within the [Flora family](/source/Flora_family) ({{small|[402](/source/FIN_tbl)}}),<ref name="lcdb" /><ref name="Ferret" /> a giant [asteroid family](/source/asteroid_family) and the largest family of stony asteroids in the main-belt,<ref name="Nesvorny-2014" />

It orbits the Sun in the [inner](/source/Kirkwood_gap) main-belt at a distance of 2.0–2.4&nbsp;[AU](/source/Astronomical_unit) once every 3 years and 4 months (1,212 days; [semi-major axis](/source/semi-major_axis) of 2.22&nbsp;AU). Its orbit has an [eccentricity](/source/orbital_eccentricity) of 0.09 and an [inclination](/source/orbital_inclination) of 4[°](/source/Degree_(angle)) with respect to the [ecliptic](/source/ecliptic).<ref name="jpldata" /> The body's [observation arc](/source/observation_arc) begins with its first observation as {{mp|1955 SS}} at the [Goethe Link Observatory](/source/Goethe_Link_Observatory) in September 1955, or 30 years prior to its official discovery observation at Palomar.<ref name="MPC-object" />

== Physical characteristics ==

In the [SMASS classification](/source/SMASS_classification), ''Gostin'' is a common, stony [S-type asteroid](/source/S-type_asteroid).<ref name="jpldata" />

=== Rotation period ===

In March 2010, a rotational [lightcurve](/source/lightcurve) of ''Gostin'' was obtained from [photometric](/source/Photometry_(astronomy)) observations at the [Oakley Southern Sky Observatory](/source/Oakley_Southern_Sky_Observatory). Lightcurve analysis gave a well-defined [rotation period](/source/rotation_period) of 3.2641 hours with a brightness variation of 0.40 [magnitude](/source/Magnitude_(astronomy)) ({{small|[U=3](/source/LCDB_quality_code)}}).<ref name="Albers-2010" /> Concurring lightcurves were also obtained at the [Palomar Transient Factory](/source/Palomar_Transient_Factory) and at the Etscorn Campus Observatory ({{small|[U=3/2/3](/source/LCDB_quality_code)}}).<ref name="lcdb" /><ref name="Chang-2014a" /><ref name="Waszczak-2015" /><ref name="Klinglesmith-2016b" />

=== Diameter and albedo ===

According to the survey carried out by the [NEOWISE](/source/NEOWISE) mission of NASA's [Wide-field Infrared Survey Explorer](/source/Wide-field_Infrared_Survey_Explorer), ''Gostin'' measures 7.148 and 7.613 kilometers in diameter and its surface has an [albedo](/source/astronomical_albedo) of 0.239 and 0.2127, respectively.<ref name="Masiero-2014" /><ref name="WISE" /> The ''Collaborative Asteroid Lightcurve Link'' assumes an albedo of 0.24 – derived from [8&nbsp;Flora](/source/8%26nbsp%3BFlora), the [parent body](/source/parent_body) of the Flora family – and calculates a diameter of 8.58 kilometers based on an [absolute magnitude](/source/absolute_magnitude) of 12.5.<ref name="lcdb" />

== Naming ==

This [minor planet](/source/minor_planet) was named by the discoverers after Australian geologist [Victor Gostin](/source/Victor_Gostin) (born 1940) of the [University of Adelaide](/source/University_of_Adelaide), who in the 1980s discovered the ejecta layer from the [Acraman](/source/Acraman_crater) bolide impact at a distance of 300 kilometers from the impact site, within [Ediacaran](/source/Ediacaran) sedimentary rocks of the [Flinders Ranges](/source/Flinders_Ranges), [South Australia](/source/South_Australia), which enabled the impact to be dated at ~580 Ma.<ref name="MPC-object" /><ref name="Gostin-1986" /> The official naming citation was published by the [Minor Planet Center](/source/Minor_Planet_Center) on 2 February 1988 ({{small|[M.P.C.](/source/Minor_Planet_Circulars) 12808}}).<ref name="MPC-Circulars-Archive" />

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

<ref name="jpldata">{{cite web
  |type       = 2017-05-05 last obs.
  |title      = JPL Small-Body Database Browser: 3640 Gostin (1985 TR3)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003640
  |publisher  = [Jet Propulsion Laboratory](/source/Jet_Propulsion_Laboratory)
  |access-date = 15 May 2018}}</ref>

<ref name="MPC-object">{{cite web
  |title      = 3640 Gostin (1985 TR3)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=3640
  |access-date = 15 May 2018}}</ref>

<ref name="Gostin-1986">{{Cite journal
  |first1     = V. A. |last1 = Gostin
  |first2     = P. W. |last2 = Haines
  |first3     = R. J. F. |last3 = Jenkins
  |first4     = W. |last4 = Compston
  |first5     = I. S. |last5 = Williams
  |date       = July 1986
  |title      = Impact ejecta horizon within late Precambrian shales, Adelaide Geosyncline, South Australia
  |journal    = Science
  |volume = 233
 |issue = 4760
 |pages      = 198–200
  |issn       = 0036-8075
  |bibcode    = 1986Sci...233..198G
  |doi        = 10.1126/science.233.4760.198|pmid = 17737290
 |s2cid = 11307364
 }}</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
  |access-date = 15 May 2018}}</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
  |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|s2cid = 119293330 }}</ref>

<ref name="Ferret">{{cite web
  |title      = Asteroid 3669 Vertinskij
  |work       = Small Bodies Data Ferret
  |url        = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=3640%20Gostin
  |access-date = 15 May 2018}}</ref>

<ref name="Nesvorny-2014">{{Cite book
  |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       = 9780816532131|s2cid = 119280014
 }}</ref>

<ref name="lcdb">{{cite LCDB|number = 3640
  |access-date = 15 May 2018}}</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
  |s2cid = 35447010 }} ([http://iopscience.iop.org/0004-637X/741/2/68/fulltext/apj398969t1_mrt.txt catalog])</ref>

<ref name="Chang-2014a">{{cite journal
  |display-authors = 6
  |first1     = Chan-Kao |last1 = Chang
  |first2     = Wing-Huen |last2 = Ip |author2-link=Ip Wing-huen
  |first3     = Hsing-Wen |last3 = Lin
  |first4     = Yu-Chi |last4 = Cheng
  |first5     = Chow-Choong |last5 = Ngeow
  |first6     = Ting-Chang |last6 = Yang
  |first7     = Adam |last7 = Waszczak
  |first8     = Shrinivas R. |last8 = Kulkarni
  |first9     = David |last9 = Levitan
  |first10    = Branimir |last10 = Sesar
  |first11    = Russ |last11 = Laher
  |first12    = Jason |last12 = Surace
  |first13    = Thomas. A. |last13 = Prince
  |date       = June 2014
  |title      = 313 New Asteroid Rotation Periods from Palomar Transient Factory Observations
  |journal    = The Astrophysical Journal
  |volume     = 788
  |issue      = 1
  |page       = 21
  |bibcode    = 2014ApJ...788...17C
  |doi        = 10.1088/0004-637X/788/1/17
  |arxiv      = 1405.1144|s2cid = 51100134 }}</ref>

<ref name="Albers-2010">{{Cite journal
  |display-authors = 6
  |first1     = Kenda |last1 = Albers
  |first2     = Katherine |last2 = Kragh
  |first3     = Adam |last3 = Monnier
  |first4     = Zachary |last4 = Pligge
  |first5     = Kellen |last5 = Stolze
  |first6     = Josh |last6 = West
  |first7     = Arnold |last7 = Yim
  |first8     = Richard |last8 = Ditteon
  |date       = October 2010
  |title      = Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2009 October thru 2010 April
  |journal    = The Minor Planet Bulletin
  |volume     = 37
  |issue      = 4
  |pages      = 152–158
  |issn       = 1052-8091
  |bibcode    = 2010MPBu...37..152A}}</ref>

<ref name="Klinglesmith-2016b">{{Cite journal
  |first1     = Daniel A. III |last1 = Klinglesmith
  |first2     = Sebastian |last2 = Hendrickx
  |first3     = Karl |last3 = Madden
  |first4     = Samuel |last4 = Montgomery
  |date       = April 2016
  |title      = Lightcurves for Shape/Spin Models
  |journal    = The Minor Planet Bulletin
  |volume     = 43
  |issue      = 2
  |pages      = 123–128
  |issn       = 1052-8091
  |bibcode    = 2016MPBu...43..123K}}</ref>

<ref name="Waszczak-2015">{{cite journal
  |display-authors = 6
  |first1     = Adam |last1 = Waszczak
  |first2     = Chan-Kao |last2 = Chang
  |first3     = Eran O. |last3 = Ofek
  |first4     = Russ |last4 = Laher
  |first5     = Frank |last5 = Masci
  |first6     = David |last6 = Levitan
  |first7     = Jason |last7 = Surace
  |first8     = Yu-Chi |last8 = Cheng
  |first9     = Wing-Huen |last9 = Ip
  |first10    = Daisuke |last10 = Kinoshita
  |first11    = George |last11 = Helou
  |first12    = Thomas A. |last12 = Prince
  |first13    = Shrinivas |last13 = Kulkarni
  |date       = September 2015
  |title      = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry
  |journal    = The Astronomical Journal
  |volume     = 150
  |issue      = 3
  |page       = 35
  |bibcode    = 2015AJ....150...75W
  |doi        = 10.1088/0004-6256/150/3/75
  |arxiv      = 1504.04041|s2cid = 8342929 }}</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
  |journal    = Icarus
  |volume     = 261
  |pages      = 34–47
  |bibcode    = 2015Icar..261...34V
  |doi        = 10.1016/j.icarus.2015.08.007
  |arxiv      = 1506.00762|s2cid = 53493339 }}</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://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
* {{AstDys|3640}}
* {{JPL small body}}

{{Minor planets navigator |3639 Weidenschilling |number=3640 |3641 Williams Bay}}
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{{DEFAULTSORT:Gostin}}
003640
Category:Discoveries by Carolyn S. Shoemaker
Category:Discoveries by Eugene Merle Shoemaker
Category:Named minor planets
003640
19851011

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Adapted from the Wikipedia article [3640 Gostin](https://en.wikipedia.org/wiki/3640_Gostin) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/3640_Gostin?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.