{{Short description|Trojan asteroid}} {{Use dmy dates|date=June 2018}} {{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}} {{respell|DAY|tər}} | named_after = Daitor<ref name="MPC-object" /><br />{{small|(Greek mythology)}} | mp_category = Jupiter trojan<ref name="MPC-object" /><ref name="jpldata" /><br />{{nowrap|Trojan<ref name="MPC-Jupiter-Trojans" />{{·}}background<ref name="AstDys-object" />}} | orbit_ref = <ref name="jpldata" /> | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 62.57 yr (22,854 d) | aphelion = 5.2615 AU | perihelion = 4.8504 AU | semimajor = 5.0560 AU | eccentricity = 0.0407 | period = 11.37 yr (4,152 d) | mean_anomaly = 264.80° | 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 = C {{small|(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}} {{respell|DAY|tər}}; provisional designation '''{{mp|1991 VZ|5}}''') is a large 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 C-type asteroid is one of the largest Jupiter trojans with an unknown 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 asteroid in the so-called Trojan camp, located in the {{L5}} Lagrangian point, 60° 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-family asteroid of the Jovian background population.<ref name="AstDys-object" /> It orbits the Sun at a distance of 4.9–5.3 AU once every 11 years and 4 months (4,152 days; semi-major axis of 5.06 AU). Its orbit has an eccentricity of 0.04 and an inclination of 15° with respect to the ecliptic.<ref name="jpldata" /> The body's observation arc begins with a precovery published by the Digitized Sky Survey and taken at Palomar Observatory in October 1955, more than 36 years prior to its official discovery observation at La Silla.<ref name="MPC-object" />
== Naming == This minor planet was named from Greek mythology after the Trojan warrior Daitor (Dai'tor), who was killed by Teucer (Teukros) during the Trojan War.<ref name="MPC-object" /><ref>Homer, ''Iliad'', 8. 275 ff</ref> The official naming citation was published by the Minor Planet Center on 27 May 2010 ({{small|M.P.C. 70409}}).<ref name="MPC-Circulars-Archive" />
== Physical characteristics == In the SDSS-based taxonomy, Daitor is a carbonaceous C-type,<ref name="Ferret" /><ref name="SDSS-Taxonomy" /> while most Jupiter trojans are D-type asteroids.
=== Rotation period === As of 2018, no rotational lightcurve of Daitor has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.<ref name="lcdb" />
=== Diameter and albedo === According to the survey carried out by the Japanese Akari satellite, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, and the Infrared Astronomical Satellite IRAS, Daitor measures between 43.38 and 51.42 kilometers in diameter and its surface has an 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 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 = 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 |archive-date = 25 June 2018 |archive-url = https://web.archive.org/web/20180625213452/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=16560+Daitor |url-status = dead }}</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 |volume = 12 |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |access-date = 25 June 2018}}</ref>
<ref name="lcdb">{{cite LCDB|number = 16560 |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}}
{{Minor planets navigator |(16559) 1991 VA3 |number=16560 |16561 Rawls}} {{Small Solar System bodies}} {{Authority control}}
{{DEFAULTSORT:Daitor}} 016560 Category:Discoveries by Eric Walter Elst Category:Named minor planets 19911102