15502 Hypeirochus
{{Short description|Jupiter trojan from the Trojan camp}}
{{Use dmy dates|date=June 2018}}
{{Infobox planet
| minorplanet = yes
| name = 15502 Hypeirochus
| background = #C2FFFF
| image =
| image_size =
| caption =
| discoverer = LINEAR
| discovery_site = Lincoln Lab's ETS
| discovered = 14 July 1999
| mpc_name = 15502 Hypeirochus
| alt_names = {{mp|1999 NV|27}}{{·}}{{mp|1982 BX|14}}
{{mp|1990 UP|2}}
| pronounced =
| named_after =
| mp_category = Jupiter trojan
{{nowrap|Trojan{{·}}background}}
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 36.31 yr (13,263 d)
| aphelion = 5.2093 AU
| perihelion = 5.0403 AU
| semimajor = 5.1248 AU
| eccentricity = 0.0165
| period = 11.60 yr (4,238 d)
| mean_anomaly = 26.357°
| mean_motion = {{Deg2DMS|0.0850|sup=ms}} / day
| inclination = 16.824°
| asc_node = 308.72°
| arg_peri = 181.57°
| jupiter_moid = 0.1096 AU
| tisserand = 2.9150
| mean_diameter = {{val|50.86|2.51|ul=km}}
{{val|53.10|0.12|u=km}}
| rotation = {{val|15.129|0.002|ul=h}}{{efn|name=lightcurve-plots-CS3}}
| albedo = {{val|0.067|0.007}}
{{val|0.069|0.021}}
| spectral_type = C {{small|(assumed)}}
B–V {{=}} {{val|0.766|0.047}}
V–R {{=}} {{val|0.445|0.036}}
V–I {{=}} {{val|0.875|0.048}}
| abs_magnitude = 9.9
10.0
10.10
}}
15502 Hypeirochus (provisional designation {{mp|1999 NV|27}}) is a Jupiter trojan from the Trojan camp, approximately {{convert|53|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 14 July 1999, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Lab's ETS near Socorro, New Mexico, in the United States. The dark Jovian asteroid has a rotation period of 15.1 hours and belongs to the 90 largest Jupiter trojans.
Orbit and classification
Hypeirochus is a dark Jovian asteroid 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 5.0–5.2 AU once every 11 years and 7 months (4,238 days; semi-major axis of 5.12 AU). Its orbit has an eccentricity of 0.02 and an inclination of 17° with respect to the ecliptic. The body's observation arc begins with its first observation as {{mp|1982 BX|14}} at Palomar Observatory in January 1982, more than 16 years prior to its official discovery observation at Socorro.
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 21 June 2000 ({{small|M.P.C. 40827}}). It was named in April 2025 after Hypeirochus, a son of King Priam who was killed by Odysseus.
Physical characteristics
Hypeirochus is an assumed carbonaceous C-type asteroid. It has a V–I color index of 0.875.
= Rotation period =
In September 2009, a first rotational lightcurve of Hypeirochus was obtained from photometric observations by Linda French at the Cerro Tololo Inter-American Observatory in Chile. Lightcurve analysis gave a rotation period of {{val|15.03|0.03}} hours with a brightness variation of 0.10 magnitude ({{small|U=2}}).
Since then, follow-up observations by Daniel Coley and Robert Stephens at the Center for Solar System Studies during 2013–2017 gave four more refined lightcurves, with the best-rated one from January 2017 showing a rotation period of {{val|15.129|0.002}} hours and an amplitude of 0.26 magnitude ({{small|U=3}}).{{efn|name=lightcurve-plots-CS3}}
= Diameter and albedo =
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Hypeirochus measures 50.86 and 53.10 kilometers in diameter and its surface has an albedo of 0.067 and 0.069, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a 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 (15502) 1999 NV27 from [http://www.planetarysciences.org/plots/RDS/15502_1999NV27_2013-07-31.PNG Aug 2013], [http://www.planetarysciences.org/plots/DC/15502_1999NV27_2014-10-09.PNG Oct 2014], [http://www.planetarysciences.org/plots/DC/15502_1999NV27_20151212.PNG Dec 2015] and [http://www.planetarysciences.org/plots/RDS/15502_1999NV27_20170117.PNG Jan 2017] by Daniel Coley and Robert Stephens at the Center for Solar System Studies {{Obscode|U80}} and {{Obscode|U81}}. Quality code is 3/2+/3/3 (lightcurve rating at CS3). Summary figures at the [http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=15502%7C1999+NV27 LCDB] and [http://www.planetarysciences.org/PHP/CS3_Lightcurves.php CS3].}}
}}
References
{{reflist|30em|refs=
|type = 2018-05-24 last obs.
|title = JPL Small-Body Database Browser: 15502 (1999 NV27)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2015502
|publisher = Jet Propulsion Laboratory
|access-date = 20 June 2018}}
|title = 15502 (1999 NV27)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=15502
|access-date = 20 June 2018}}
|title = List of Jupiter Trojans
|work = Minor Planet Center
|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
|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
}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-6?-source=J/ApJ/759/49/table1&MPC=15502 online catalog])
|title = Asteroid (15502) 1999 NV27 – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?n=15502&pc=1.1.6
|access-date= 20 June 2018}}
|title = LCDB Data for (15502)
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=15502%7C
|access-date = 20 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 = free
}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=15502 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
|journal = The Minor Planet Bulletin
|volume = 41
|issue = 2
|pages = 95–100
|issn = 1052-8091
|bibcode = 2014MPBu...41...95S}}
|first1 = Robert D. |last1 = Stephens
|first2 = Daniel R. |last2 = Coley
|first3 = Linda M. |last3 = French
|date = July 2015
|title = Dispatches from the Trojan Camp - Jovian Trojan L5 Asteroids Observed from CS3: 2014 October - 2015 January
|journal = The Minor Planet Bulletin
|volume = 42
|issue = 3
|pages = 216–224
|issn = 1052-8091
|bibcode = 2015MPBu...42R.216S}}
|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
|journal = The Minor Planet Bulletin
|volume = 40
|issue = 4
|pages = 198–203
|issn = 1052-8091
|bibcode = 2013MPBu...40..198F}}
|first1 = Robert D. |last1 = Stephens
|first2 = Daniel R. |last2 = Coley
|first3 = Brian D. |last3 = Warner
|first4 = Linda M. |last4 = French
|date = October 2016
|title = Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies
|journal = The Minor Planet Bulletin
|volume = 43
|issue = 4
|pages = 323–331
|issn = 1052-8091
|bibcode = 2016MPBu...43..323S}}
|first1 = Robert D. |last1 = Stephens
|first2 = Daniel R. |last2 = Coley
|date = July 2017
|title = Lightcurve Analysis of Trojan Asteroids at the Center for Solar System Studies 2017 January - March
|journal = The Minor Planet Bulletin
|volume = 44
|issue = 3
|pages = 252–257
|pmid = 32455404
|pmc = 7243922
|issn = 1052-8091
|bibcode = 2017MPBu...44..252S}}
|first1 = O. R. |last1 = Hainaut
|first2 = H. |last2 = Boehnhardt
|first3 = S. |last3 = Protopapa
|date = October 2012
|title = Colours of minor bodies in the outer solar system. II. A statistical analysis revisited
|journal = Astronomy and Astrophysics
|volume = 546
|page = 20
|bibcode = 2012A&A...546A.115H
|doi = 10.1051/0004-6361/201219566
|arxiv = 1209.1896
|s2cid = 54776793}}
|title = WGSBN Bulletin 5, #5
|url = https://wgsbn-iau.org/files/Bulletins/V005/WGSBNBull_V005_005.pdf
|journal = WGSBN Bulletin
|publisher = International Astronomical Union
|volume = 5
|issue = 5
|date = 7 April 2025
|accessdate = 7 April 2025}}
}}
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/NumberedMPs015001.html Discovery Circumstances: Numbered Minor Planets (15001)-(20000)] – Minor Planet Center
- [https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=15502 Asteroid (15502) 1999 NV27] at the Small Bodies Data Ferret
- {{AstDys|15502}}
- {{JPL small body|id=2015502}}
{{Minor planets navigator |15501 Pepawlowski |number=15502 | }}
{{Small Solar System bodies}}
{{Authority control}}
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