3391 Sinon
{{Use dmy dates|date=June 2018}}
{{Infobox planet
| minorplanet = yes
| name = 3391 Sinon
| background = #C2FFFF
| image = 003391-asteroid shape model (3391) Sinon.png
| image_scale =
| caption = Shape model of Sinon from its lightcurve
| discoverer = H. Kosai
K. Furukawa
| discovery_site = Kiso Station
| discovered = 18 February 1977
| mpc_name = (3391) Sinon
| alt_names = {{mp|1977 DD|3}}
| pronounced = {{IPAc-en|ˈ|s|aɪ|n|ɒ|n}}Noah Webster (1884) A Practical Dictionary of the English Language
| named_after = Sinon {{small|(Greek mythology)}}
| mp_category = Jupiter trojan
{{nowrap|Greek {{·}}background }}
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 63.16 yr (23,071 d)
| aphelion = 5.7383 AU
| perihelion = 4.8691 AU
| semimajor = 5.3037 AU
| eccentricity = 0.0819
| period = 12.21 yr (4,461 d)
| mean_anomaly = 200.54°
| mean_motion = {{Deg2DMS|0.0807|sup=ms}} / day
| inclination = 14.871°
| asc_node = 341.10°
| arg_peri = 103.13°
| jupiter_moid = 0.2572 AU
| tisserand = 2.9260
| mean_diameter = {{val|37.86|6.82|ul=km}}
{{val|48.48|u=km}} {{small|(calculated)}}
| rotation = {{val|8.135|ul=h}}{{efn|name=lightcurve-plots-CS3}}
| albedo = {{val|0.057}} {{small|(assumed)}}
{{val|0.093|0.036}}
| spectral_type = C {{small|(assumed)}}
}}
3391 Sinon {{IPAc-en|ˈ|s|aɪ|n|ɒ|n}} is a mid-sized Jupiter trojan from the Greek camp, approximately {{convert|40|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 18 February 1977, by Japanese astronomers Hiroki Kosai and Kiichirō Furukawa at the Kiso Observatory in Japan. The dark Jovian asteroid has a rotation period of 8.1 hours and likely an elongated shape. It was named after the hero Sinon from Greek mythology.
Orbit and classification
Sinon is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's {{L4}} Lagrangian point, 60° ahead on its orbit {{crossreference|(see Trojans in astronomy)}}. It is also a non-family asteroid of the Jovian background population. It orbits the Sun at a distance of 4.9–5.7 AU once every 12 years and 3 months (4,461 days; semi-major axis of 5.3 AU). Its orbit has an eccentricity of 0.08 and an inclination of 15° with respect to the ecliptic. The body's observation arc begins with a precovery at Palomar Observatory in March 1953, almost 24 years prior to its official discovery observation at Kiso.
Physical characteristics
Sinon is assumed to be a carbonaceous C-type asteroid.
= Rotation period =
In February 2013, a rotational lightcurve of Sinon was obtained from photometric observations by Lawrence Wasserman at Lowell Observatory and by Robert Stephens at the Center for Solar System Studies. Lightcurve analysis gave a well-defined rotation period of {{val|8.135|0.002}} hours with a brightness amplitude of 0.72 magnitude, indicative of a non-spherical shape ({{small|U=3}}).{{efn|name=lightcurve-plots-CS3}}
= Diameter and albedo =
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Sinon measures 37.86 kilometers in diameter and its surface has an albedo of 0.093, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 48.48 kilometers based on an absolute magnitude of 10.3.
Naming
This minor planet was named from Greek mythology after Sinon, a Greek warrior of the Trojan War. The official naming citation was published by the Minor Planet Center on 16 December 1986 ({{small|M.P.C. 11443}}).
Notes
{{notelist|refs=
{{efn|name=lightcurve-plots-CS3|1=Lightcurve plot of (3391) Sinon from [http://www.planetarysciences.org/plots/RDS/3391_SINON_2013-02-21.PNG Feb 2013] by Robert Stephens at the Center for Solar System Studies {{Obscode|U81}}. Quality code is not available (lightcurve rating at CS3). Summary figures at the [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=3391%7CSinon LCDB] and [http://www.planetarysciences.org/PHP/CS3_Lightcurves.php CS3].}}
}}
References
{{reflist|30em|refs=
|type = 2018-05-23 last obs.
|title = JPL Small-Body Database Browser: 3391 Sinon (1977 DD3)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003391
|archive-url = https://web.archive.org/web/20200916000555/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003391
|url-status = dead
|archive-date = 16 September 2020
|publisher = Jet Propulsion Laboratory
|access-date = 20 June 2018}}
|title = 3391 Sinon (1977 DD3)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=3391
|access-date = 20 June 2018}}
|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 = 20 June 2018}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date = 20 June 2018}}
|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= 20 June 2018}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-6?-source=J/ApJ/759/49/table1&MPC=03391 online catalog])
|title = Asteroid (3391) Sinon – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?n=3391&pc=1.1.6
|access-date= 20 June 2018}}
|title = LCDB Data for (3391) Sinon
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=3391%7CSinon
|access-date = 20 June 2018}}
|first1 = Linda M. |last1 = French
|first2 = Robert, D. |last2 = Stephens
|first3 = Daniel R. |last3 = Coley
|first4 = Lawrence H. |last4 = Wasserman
|first5 = Faith |last5 = Vilas
|first6 = Daniel |last6 = La Rocca
|date = October 2013
|title = A Troop of Trojans: Photometry of 24 Jovian Trojan Asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40..198F
|journal = The Minor Planet Bulletin
|volume = 40
|issue = 4
|pages = 198–203
|issn = 1052-8091
|bibcode = 2013MPBu...40..198F
|access-date= 20 June 2018}}
}}
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
- [https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=3391+Sinon Asteroid 3391 Sinon] at the Small Bodies Data Ferret
- {{AstDys|3391}}
- {{JPL small body}}
{{Minor planets navigator |3390 Demanet |number=3391 |3392 Setouchi}}
{{Small Solar System bodies}}
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Category:Discoveries by Hiroki Kosai