7352 Hypsenor
{{Use dmy dates|date=November 2021}}
{{Infobox planet
| minorplanet = yes
| name = 7352 Hypsenor
| background = #C2FFFF
| image =
| image_size =
| caption =
| discovered = 4 February 1994
| discoverer = S. Ueda
H. Kaneda
| discovery_site = Kushiro Obs.
| mpc_name = (7352) Hypsenor
| alt_names = 1994 CO{{·}}{{mp|1991 VD|3}}
| adjective = Hypsenorian
| pronounced = {{IPAc-en|h|I|p|'|s|i:|n|Or}}
| named_after = Hypsenor
{{small|(Greek mythology)}}
| mp_category = Jupiter trojan
{{nowrap|Trojan{{·}}background}}
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 29.75 yr (10,868 d)
| aphelion = 5.3239 AU
| perihelion = 4.9409 AU
| semimajor = 5.1324 AU
| eccentricity = 0.0373
| period = 11.63 yr (4,247 d)
| mean_anomaly = 257.93°
| mean_motion = {{Deg2DMS|0.0848|sup=ms}} / day
| inclination = 8.1816°
| asc_node = 130.32°
| arg_peri = 125.51°
| jupiter_moid = 0.0307 AU
| tisserand = 2.9790
| mean_diameter = {{val|47.07|2.06|ul=km}}
{{val|47.73|0.79|u=km}}
| rotation = {{val|648|3|ul=h}}{{efn|name=lightcurve-plots-CS3}}
| albedo = {{val|0.093|0.023}}
{{val|0.207|0.020}}
| spectral_type = X/L {{small|(SDSS-MOC)}}
B–V {{=}} {{val|0.660|0.060}}
V–R {{=}} {{val|0.460|0.040}}
V–I {{=}} {{val|0.850|0.027}}
}}
7352 Hypsenor, provisional designation: {{mp|1994 CO}}, is a larger Jupiter trojan from the Trojan camp, approximately {{convert|48|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. The tumbling Jovian asteroid is a slow rotator with an exceptionally long rotation period of 648 hours. It was discovered on 4 February 1994 by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at the Kushiro Observatory on Hokkaidō, Japan. It was numbered in December 1996, and named after the Trojan warrior Hypsenor from Greek mythology in November 2021.
Classification and orbit
Hypsenor is a Jupiter trojan in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's {{L5}} Lagrangian point, 60° behind 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 4.9–5.3 AU once every 11 years and 8 months (4,247 days; semi-major axis of 5.13 AU). Its orbit has an eccentricity of 0.04 and an inclination of 8° with respect to the ecliptic. The body's observation arc begins with a precovery taken at the Palomar Observatory in August 1988, more than 5 years prior to its official discovery observation at Kushiro.
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 24 December 1996 ({{small|M.P.C. 28576}}). On 29 November 2021, IAU's Working Group for Small Bodies Nomenclature {{MoMP|7352|named}} it from Greek mythology after the warrior Hypsenor, who was killed during the Trojan War by the Trojan prince Deiphobus whose Javelin throw bounced back of Idomeneus{{'}} shield.
Physical characteristics
= Rotation period =
In October 2013, a rotational lightcurve was obtained for this asteroid from photometric observations by American amateur astronomer Robert Stephens at the Trojan Station {{Obscode|U81}} of the Center for Solar System Studies in Landers, California. It gave a well-defined, outstandingly long rotation period of {{val|648|3}} hours with a brightness variation of 0.30 magnitude ({{small|U=3-}}).{{efn|name=lightcurve-plots-CS3}} As of 2018, there are only about three dozens known slow rotators with periods longer than that of Hypsenor.
= Tumbler =
The astronomers also detected a non-principal axis rotation seen in distinct rotational cycles in successive order. This is commonly known as tumbling. Hypsenor is the six-largest asteroid and the second-largest Jupiter trojan after 4902 Thessandrus known to be is such a state (also see list of tumblers).
= Diameter and albedo =
According to the space-based surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Hypsenor measures 47.07 and 47.73 kilometers in diameter and its surface has an albedo of 0.207 and 0.093, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a larger diameter of 55.67 kilometers, based on an absolute magnitude of 10.0.
{{Largest Jupiter trojans}}
Notes
{{notelist|refs=
{{efn|name=lightcurve-plots-CS3|1=Lightcurve plots of 7352 Hypsenor [(7352) 1994 CO] from [http://www.planetarysciences.org/plots/RDS/7352_1994CO_2013-09-13.PNG September to November 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=7352%7C1994+CO LCDB] and [http://www.planetarysciences.org/PHP/CS3_Lightcurves.php CS3].}}
}}
References
{{reflist|refs=
|type = 2018-05-19 last obs.
|title = JPL Small-Body Database Browser: 7352 Hypsenor
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007352
|publisher = Jet Propulsion Laboratory
|access-date= 22 June 2018}}
|title = 7352 Hypsenor
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=7352
|access-date= 22 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= 22 June 2018}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date= 22 June 2018}}
|title = WGSBN Bulletin Archive
|work = Working Group for Small Bodies Nomenclature
|date = 29 November 2021
|url = https://www.wgsbn-iau.org/files/Bulletins/index.html
|access-date= 29 November 2021}} ([https://www.wgsbn-iau.org/files/Bulletins/V001/WGSBNBull_V001_012.pdf Bulletin #12])
|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= 22 June 2018}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-6?-source=J/ApJ/759/49/table1&MPC=07352 online catalog])
|title = Asteroid (7352) 1994 CO – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?n=7352&pc=1.1.6
|access-date= 22 June 2018}}
|title = Asteroid (7352) 1994 CO
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=7352
|access-date= 22 June 2018}}
|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)]
|title = LCDB Data for (7352)
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=7352%7C
|access-date= 22 June 2018}}
|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=7352 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])
|first1 = Robert D. |last1 = Stephens
|first2 = Linda M. |last2 = French
|first3 = Chelsea |last3 = Davitt
|first4 = Daniel R. |last4 = Coley
|date = April 2014
|title = At the Scaean Gates: Observations Jovian Trojan Asteroids, July- December 2013
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41...95S
|journal = The Minor Planet Bulletin
|volume = 41
|issue = 2
|pages = 95–100
|issn = 1052-8091
|bibcode = 2014MPBu...41...95S
|access-date= 22 June 2018}}
|first1 = Joseph P. |last1 = Chatelain
|first2 = Todd J. |last2 = Henry
|first3 = Linda M. |last3 = French
|first4 = Jennifer G. |last4 = Winters
|first5 = David E. |last5 = Trilling
|date = June 2016
|title = Photometric colors of the brightest members of the Jupiter L5 Trojan cloud
|journal = Icarus
|volume = 271
|pages = 158–169
|bibcode = 2016Icar..271..158C
|doi = 10.1016/j.icarus.2016.01.026
|doi-access =free }}
}}
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://www.minorplanetcenter.net/iau/lists/NumberedMPs005001.html Discovery Circumstances: Numbered Minor Planets (5001)-(10000)] – Minor Planet Center
- {{AstDys|7352}}
- {{JPL small body}}
{{Minor planets navigator |7351 Yoshidamichi |number=7352 |7353 Kazuya}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Hypsenor}}
Category:Discoveries by Hiroshi Kaneda