# 34351 Decatur

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{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=June 2018}}
{{Infobox planet
 | minorplanet     = yes
 | name            = 34351 Decatur
 | background      = #D6D6D6
 | image           = 
 | image_size      = 
 | caption         = 
 | discovery_ref   = <ref name="MPC-object" />
 | discovered      = 3 September 2000
 | discoverer      = [L. Ball](/source/Loren_C._Ball)
 | discovery_site  = [Emerald Lane Obs.](/source/Emerald_Lane_Observatory)
 | mpc_name        = (34351) Decatur
 | alt_names       = {{nowrap|{{mp|2000 RZ|8}}{{·}}{{mp|1996 YW|3}}}}<br />{{mp|1998 HF|58}}
 | pronounced      = 
 | named_after     = [Decatur](/source/Decatur%2C_Alabama) {{small|(U.S. city)}}<ref name="springer" />
 | mp_category     = [main-belt](/source/main-belt)<ref name="MPC-object" /><ref name="jpldata" />{{·}}{{small|([outer](/source/Kirkwood_gap))}}<br />[Koronis](/source/Koronis_family)<ref name="Ferret" />
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 23 March 2018 ([JD](/source/Julian_day) 2458200.5)
 | uncertainty     = 0
 | observation_arc = 26.31 [yr](/source/Julian_year_(astronomy)) (9,609 d)
 | aphelion        = 3.1502 [AU](/source/Astronomical_unit)
 | perihelion      = 2.7415 AU
 | semimajor       = 2.9458 AU
 | eccentricity    = 0.0694
 | period          = 5.06 yr (1,847 d)
 | mean_anomaly    = 108.47[°](/source/Degree_(angle))
 | mean_motion     = {{Deg2DMS|0.1949|sup=ms}} / day
 | inclination     = 1.2964°
 | asc_node        = 343.30°
 | arg_peri        = 85.412°
 | mean_diameter   = {{val|3.54|0.27|ul=km}}<ref name="Masiero-2011" />
 | rotation        = 
 | albedo          = {{val|0.224|0.043}}<ref name="Masiero-2011" />
 | spectral_type   = [Q](/source/Q-type_asteroid) {{small|([SDSS](/source/Sloan_Digital_Sky_Survey)-MOC)}}<ref name="Ferret" /><ref name="SDSS-Taxonomy" />
 | abs_magnitude   = 14.7<ref name="MPC-object" /><ref name="jpldata" />
}}

'''34351 Decatur''' ([provisional designation](/source/Minor_planet_provisional_designation) '''{{mp|2000 RZ|8}}''') is a [Koronis asteroid](/source/Koronis_family) from the outer region of the [asteroid belt](/source/asteroid_belt), approximately {{convert|3.5|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 3 September 2000, by American amateur astronomer [Loren Ball](/source/Loren_C._Ball) at his [Emerald Lane Observatory](/source/Emerald_Lane_Observatory) in Alabama, United States.<ref name="MPC-object" /> The [Q-type asteroid](/source/Q-type_asteroid) was named after the city of [Decatur](/source/Decatur%2C_Alabama), location of the discovering observatory.<ref name="springer" />

== Orbit and classification ==
Decatur is a member of the [Koronis family](/source/Koronis_family) ({{small|[605](/source/FIN_tbl)}}),<ref name="Ferret" />  a very large outer [asteroid family](/source/asteroid_family) with nearly co-planar ecliptical orbits.<ref name="Nesvorny-2014" /> It orbits the Sun in the [outer](/source/Kirkwood_gap) main-belt at a distance of 2.7–3.2&nbsp;[AU](/source/Astronomical_unit) once every 5 years and 1 month (1,847 days; [semi-major axis](/source/semi-major_axis) of 2.95&nbsp;AU). Its orbit has an [eccentricity](/source/orbital_eccentricity) of 0.07 and an [inclination](/source/orbital_inclination) of 1[°](/source/Degree_(angle)) with respect to the [ecliptic](/source/ecliptic).<ref name="jpldata" /> The asteroid's [observation arc](/source/observation_arc) begins 8 years prior to its official discovery observation, with a [precovery](/source/precovery) taken by the [Steward Observatory](/source/Steward_Observatory)'s [Spacewatch](/source/Spacewatch) survey at Kitt Peak in January 1992.<ref name="MPC-object" />

== Naming ==
This [minor planet](/source/minor_planet) was named after the city of [Decatur](/source/Decatur%2C_Alabama) in the U.S. state of Alabama, location of the discovering observatory and home of the discoverer. Decatur is located near NASA's [Marshall Space Flight Center](/source/Marshall_Space_Flight_Center).<ref name="springer" /> The official naming citation was published by the [Minor Planet Center](/source/Minor_Planet_Center) on 27 April 2002 ({{small|[M.P.C.](/source/Minor_Planet_Circulars) 45345}}).<ref name="MPC-Circulars-Archive" />

== Physical characteristics ==
In the [SDSS](/source/Sloan_Digital_Sky_Survey)-based taxonomy, Decatur is a [Q-type asteroid](/source/Q-type_asteroid),<ref name="Ferret" /><ref name="SDSS-Taxonomy" /> while members of the Koronis family are typically [S-type asteroid](/source/S-type_asteroid).<ref name="Nesvorny-2014" />{{rp|23}} 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), Decatur measures 3.54 kilometers in diameter and its surface has an [albedo](/source/astronomical_albedo) of 0.224.<ref name="Masiero-2011" />

=== Rotation period ===
As of 2018, no rotational [lightcurve](/source/lightcurve) of Decatur has been obtained from [photometric](/source/Photometry_(astronomy)) observations. The body's [rotation period](/source/rotation_period), [pole](/source/Poles_of_astronomical_bodies) and shape remain unknown.<ref name="jpldata" /><ref name="lcdb" />

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

<ref name="jpldata">{{cite web
  |type       = 2018-04-23 last obs.
  |title      = JPL Small-Body Database Browser: 34351 Decatur (2000 RZ8)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2034351
  |archive-url = https://web.archive.org/web/20170305001610/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2034351
  
  |archive-date = 5 March 2017
  |publisher  = [Jet Propulsion Laboratory](/source/Jet_Propulsion_Laboratory)
  |access-date = 27 June 2018}}</ref>

<ref name="springer">{{cite book
  |last       = Schmadel | first = Lutz D.
  |title = Dictionary of Minor Planet Names |publisher  = Springer Berlin Heidelberg
  |page       = 891
  |date       = 2007
  |isbn       = 978-3-540-00238-3
  |doi       = 10.1007/978-3-540-29925-7_9989 |chapter       = (34351) Decatur }}</ref>

<ref name="MPC-object">{{cite web
  |title      = 34351 Decatur (2000 RZ8)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=34351
  |access-date = 27 June 2018}}</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 = 27 June 2018}}</ref>

<ref name="Masiero-2011">{{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     = J. |last6 = Dailey
  |first7     = P. R. M. |last7 = Eisenhardt
  |first8     = R. S. |last8 = McMillan
  |first9     = T. B. |last9 = Spahr
  |first10    = M. F. |last10 = Skrutskie
  |first11    = D. |last11 = Tholen
  |first12    = R. G. |last12 = Walker
  |first13    = E. L. |last13 = Wright
  |first14    = E. |last14 = DeBaun
  |first15    = D. |last15 = Elsbury
  |first16    = T. IV |last16 = Gautier
  |first17    = S. |last17 = Gomillion
  |first18    = A. |last18 = Wilkins
  |date       = November 2011
  |title      = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters
  |url        = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M
  |journal    = The Astrophysical Journal
  |volume     = 741
  |issue      = 2
  |page       = 20
  |bibcode    = 2011ApJ...741...68M
  |doi        = 10.1088/0004-637X/741/2/68
  |arxiv      = 1109.4096
  |access-date= 27 June 2018}}</ref>

<ref name="Ferret">{{cite web
  |title      = Asteroid 34351 Decatur
  |work       = Small Bodies Data Ferret
  |url        = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=34351+Decatur
  |access-date = 27 June 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       = 978-0-8165-3213-1}}</ref>

<ref name="SDSS-Taxonomy">{{Cite journal
  |first1     = J. M. |last1 = Carvano
  |first2     = P. H. |last2 = Hasselmann
  |first3     = D. |last3 = Lazzaro
  |first4     = T. |last4 = Mothé-Diniz
  |date       = February 2010
  |title      = SDSS-based taxonomic classification and orbital distribution of main belt asteroids
  |url        = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_I0035_5_SDSSTAX_V1_1/data/sdsstax_ast_table.tab
  |journal    = Astronomy and Astrophysics
  |volume     = 510
  |page       = 12
  |bibcode    = 2010A&A...510A..43C 
  |doi        = 10.1051/0004-6361/200913322
  |access-date= 30 October 2019|doi-access= free
  }} [https://sbn.psi.edu/pds/resource/sdsstax.html (PDS data set)]</ref>

<ref name="lcdb">{{cite LCDB|number = 34351
  |access-date = 27 June 2018}}</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/NumberedMPs030001.html Discovery Circumstances: Numbered Minor Planets (30001)-(35000)] – Minor Planet Center
* {{AstDys|34351}}
* {{JPL small body}}

{{Minor planets navigator | |number=34351 | }}
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{{DEFAULTSORT:Decatur}}
034351
Category:Discoveries by Loren C. Ball
Category:Named minor planets
20000903

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Adapted from the Wikipedia article [34351 Decatur](https://en.wikipedia.org/wiki/34351_Decatur) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/34351_Decatur?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.