View source for Astronomy:16560 Daitor

{{Infobox planet
 | minorplanet     = yes
 | name            = 16560 Daitor
 | background      = #C2FFFF
 | image           = 
 | image_size      = 
 | caption         = 
 | discovery_ref   = <ref name="MPC-object" />
 | discoverer      = E. W. Elst
 | discovery_site  = La Silla Obs.
 | discovered      = 2 November 1991
 | mpc_name        = (16560) Daitor
 | alt_names       = {{mp|1991 VZ|5}}{{·}}{{mp|1998 MR|21}}<br />{{mp|1999 NU|24}}
 | adjective       = Daitorian
 | pronounced      = {{IPAc-en|'|d|eɪ|t|ər}}
 | named_after     = Daitor<ref name="MPC-object" /><br />{{small|(Greek mythology)}}
 | mp_category     = [[Astronomy:Jupiter trojan|Jupiter trojan]]<ref name="MPC-object" /><ref name="jpldata" /><br />{{nowrap|Trojan<ref name="MPC-Jupiter-Trojans" />{{·}}[[Astronomy:Background asteroid|background]]<ref name="AstDys-object" />}}
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 23 March 2018 ([[Astronomy:Julian day|JD]] 2458200.5)
 | uncertainty     = 0
 | observation_arc = 62.57 [[Astronomy:Julian year|yr]] (22,854 d)
 | aphelion        = 5.2615 [[Astronomy:Astronomical unit|AU]]
 | perihelion      = 4.8504 AU
 | semimajor       = 5.0560 AU
 | eccentricity    = 0.0407
 | period          = 11.37 yr (4,152 d)
 | mean_anomaly    = 264.80[[Degree (angle)|°]]
 | mean_motion     = {{Deg2DMS|0.0867|sup=ms}} / day
 | inclination     = 15.311°
 | asc_node        = 100.76°
 | arg_peri        = 157.89°
 | jupiter_moid    = 0.0606 AU
 | tisserand       = 2.9290
 | mean_diameter   = {{val|43.38|3.29|ul=km}}<ref name="AKARI" /><br />{{val|43.86|0.40|ul=km}}<ref name="Grav-2012" /><br />{{val|51.42|4.6|ul=km}}<ref name="SIMPS" />
 | rotation        = 
 | albedo          = {{val|0.0292|0.006}}<ref name="SIMPS" /><br />{{val|0.041|0.006}}<ref name="AKARI" /><br />{{val|0.053|0.008}}<ref name="Grav-2012" />
 | spectral_type   = [[Astronomy:C-type asteroid|C]] {{small|([[Astronomy:Sloan Digital Sky Survey|SDSS]]-MOC)}}<ref name="Ferret" /><ref name="SDSS-Taxonomy" />
 | abs_magnitude   = 10.6<ref name="jpldata" /><ref name="Grav-2012" /><br />10.7<ref name="MPC-object" /><ref name="lcdb" /><br />10.90<ref name="AKARI" />
}}

'''16560 Daitor''' ({{IPAc-en|'|d|eɪ|t|ər}}; provisional designation '''{{mp|1991 VZ|5}}''') is a large [[Astronomy:Jupiter trojan|Jupiter trojan]] from the Trojan camp, approximately {{convert|44|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 2 November 1991, by Belgian astronomer Eric Elst at the La Silla site of the European Southern Observatory in Chile.<ref name="MPC-object" /> The carbonaceous [[Astronomy:C-type asteroid|C-type asteroid]] is one of the largest Jupiter trojans with an unknown [[Rotation period|rotation period]].<ref name="lcdb" /> It was named after the Trojan warrior Daitor from Greek mythology.<ref name="MPC-object" />

== Orbit and classification ==
Daitor is a Jovian [[Astronomy:Asteroid|asteroid]] in the so-called Trojan camp, located in the {{L5}} [[Astronomy:Lagrangian point|Lagrangian point]], 60[[Degree (angle)|°]] behind Jupiter, orbiting in a 1:1 resonance with the Gas Giant {{crossreference|(see Trojans in astronomy)}}.<ref name="MPC-Jupiter-Trojans" />

It is also a non-[[Astronomy:Asteroid family|family]] asteroid of the [[Astronomy:Background asteroid|Jovian background population]].<ref name="AstDys-object" /> It orbits the Sun at a distance of 4.9–5.3&nbsp;[[Astronomy:Astronomical unit|AU]] once every 11 years and 4 months (4,152 days; semi-major axis of 5.06&nbsp;AU). Its orbit has an [[Astronomy:Orbital eccentricity|eccentricity]] of 0.04 and an [[Astronomy:Orbital inclination|inclination]] of 15[[Degree (angle)|°]] with respect to the [[Astronomy:Ecliptic|ecliptic]].<ref name="jpldata" /> The body's [[Astronomy:Observation arc|observation arc]] begins with a [[Astronomy:Precovery|precovery]] published by the [[Astronomy:Digitized Sky Survey|Digitized Sky Survey]] and taken at [[Organization:Palomar Observatory|Palomar Observatory]] in October 1955, more than 36 years prior to its official discovery observation at La Silla.<ref name="MPC-object" />

== Naming ==
This [[Astronomy:Minor planet|minor planet]] was named from [[Religion:Greek mythology|Greek mythology]] after the Trojan warrior Daitor (Dai'tor), who was killed by Teucer (Teukros) during the Trojan War.<ref name="MPC-object" /><ref>[[Biography:Homer|Homer]], ''[[Religion:Iliad|Iliad]]'', 8. 275 ff</ref> The official naming citation was published by the [[Organization:Minor Planet Center|Minor Planet Center]] on 27 May 2010 ({{small|M.P.C. 70409}}).<ref name="MPC-Circulars-Archive" />

== Physical characteristics ==
In the [[Astronomy:Sloan Digital Sky Survey|SDSS]]-based taxonomy, Daitor is a carbonaceous [[Astronomy:C-type asteroid|C-type]],<ref name="Ferret" /><ref name="SDSS-Taxonomy" /> while most Jupiter trojans are [[Astronomy:D-type asteroid|D-type asteroid]]s.

=== Rotation period ===
As of 2018, no rotational [[Astronomy:Lightcurve|lightcurve]] of Daitor has been obtained from [[Astronomy:Photometry|photometric]] observations. The body's [[Rotation period|rotation period]], [[Astronomy:Poles of astronomical bodies|pole]] and shape remain unknown.<ref name="lcdb" />

=== Diameter and albedo ===
According to the survey carried out by the Japanese [[Astronomy:Akari (satellite)|Akari satellite]], the [[Astronomy:NEOWISE|NEOWISE]] mission of NASA's [[Astronomy:Wide-field Infrared Survey Explorer|Wide-field Infrared Survey Explorer]], and the Infrared Astronomical Satellite [[Astronomy:IRAS|IRAS]], Daitor measures between 43.38 and 51.42 kilometers in diameter and its surface has an [[Astronomy:Astronomical albedo|albedo]] between 0.029 and 0.053.<ref name="AKARI" /><ref name="Grav-2012" /><ref name="SIMPS" /> The ''Collaborative Asteroid Lightcurve Link'' assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 40.33 kilometers based on an [[Astronomy:Absolute magnitude|absolute magnitude]] of 10.7.<ref name="lcdb" />

{{Largest Jupiter trojans}}

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

<ref name="jpldata">{{cite web
  |type       = 2018-05-19 last obs.
  |title      = JPL Small-Body Database Browser: 16560 Daitor (1991 VZ5)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2016560
  |publisher  = [[Organization:Jet Propulsion Laboratory|Jet Propulsion Laboratory]]
  |access-date = 25 June 2018}}</ref>

<ref name="MPC-object">{{cite web
  |title      = 16560 Daitor (1991 VZ5)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=16560
  |access-date = 25 June 2018}}</ref>

<ref name="MPC-Jupiter-Trojans">{{cite web
  |title      = List of Jupiter Trojans
  |work       = Minor Planet Center
  |first3     = V. |last3 = Carruba
  |date       = 1 June 2018
  |url        = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html
  |access-date = 25 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 = 25 June 2018}}</ref>

<ref name="Grav-2012">{{cite journal
  |first1     = T. |last1 = Grav
  |first2     = A. K. |last2 = Mainzer
  |first3     = J. M. |last3 = Bauer
  |first4     = J. R. |last4 = Masiero
  |first5     = C. R. |last5 = Nugent
  |date       = November 2012
  |title      = WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy
  |url        = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759...49G
  |journal    = The Astrophysical Journal
  |volume     = 759
  |issue      = 1
  |page       = 10
  |bibcode    = 2012ApJ...759...49G
  |doi        = 10.1088/0004-637X/759/1/49
  |arxiv      = 1209.1549
  |s2cid = 119101711
 |access-date= 25 June 2018}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-6?-source=J/ApJ/759/49/table1&MPC=16560 online catalog])</ref>

<ref name="AstDys-object">{{cite web
  |title      = Asteroid (16560) Daitor – Proper Elements
  |publisher  = AstDyS-2, Asteroids – Dynamic Site
  |url        = https://newton.spacedys.com/astdys/index.php?n=16560&pc=1.1.6
  |access-date= 25 June 2018}}</ref>

<ref name="Ferret">{{cite web
  |title      = Asteroid 16560 Daitor
  |work       = Small Bodies Data Ferret
  |url        = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=16560+Daitor
  |access-date = 25 June 2018}}</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="SIMPS">{{cite journal
  |first1     = E. F. |last1 = Tedesco
  |first2     = P. V. |last2 = Noah
  |first3     = M. |last3 = Noah
  |first4     = S. D. |last4 = Price
  |date       = October 2004
  |title      = IRAS Minor Planet Survey V6.0
  |url        = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab
  |journal    = NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0
  |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0
 |bibcode    = 2004PDSS...12.....T
  |access-date = 25 June 2018}}</ref>

<ref name="lcdb">{{cite web
  |title      = LCDB Data for (16560) Daitor
  |publisher  = Asteroid Lightcurve Database (LCDB)
  |url        = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=16560%7CDaitor
  |access-date = 25 June 2018}}</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=16560 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</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/NumberedMPs015001.html Discovery Circumstances: Numbered Minor Planets (15001)-(20000)] – Minor Planet Center
* {{AstDys|16560}}
* {{JPL small body}}

{{Small Solar System bodies}}

{{DEFAULTSORT:Daitor}}
[[Category:Named minor planets]]

{{Sourceattribution|16560 Daitor}}