10247 Amphiaraos
{{Short description|Trojan asteroid}}
{{Use dmy dates|date=May 2018}}
{{Infobox planet
| minorplanet = yes
| name = 10247 Amphiaraos
| background = #C2FFFF
| image =
| image_size =
| caption =
| discoverer = C. J. van Houten
I. van Houten-G.
T. Gehrels
| discovery_site = Palomar Obs.
| discovered = 24 September 1960
| mpc_name = (10247) Amphiaraos
| alt_names = 6629 P-L{{·}}{{mp|1994 PT|9}}
| pronounced = {{IPAc-en|ˌ|æ|m|f|i|ə|'|r|eɪ|ə|s|,_|-|Q|s}}'Amphiaraus' in Noah Webster (1884) A Practical Dictionary of the English Language
| named_after = Amphiaraus
{{small|(Greek mythology)}}
| mp_category = Jupiter trojan
{{nowrap|Greek{{·}}background}}
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 57.01 yr (20,822 d)
| aphelion = 5.3043 AU
| perihelion = 5.2213 AU
| semimajor = 5.2628 AU
| eccentricity = 0.0079
| period = 12.07 yr (4,410 d)
| mean_anomaly = 182.20°
| mean_motion = {{Deg2DMS|0.0816|sup=ms}} / day
| inclination = 4.1913°
| asc_node = 162.52°
| arg_peri = 343.92°
| jupiter_moid = 0.2185 AU
| tisserand = 2.9950
| mean_diameter = {{val|26.83|0.69|u=km}}
33.54 km {{small|(calculated)}}
| rotation = {{val|34.26|0.01|ul=h}}
| albedo = {{val|0.057}} {{small|(assumed)}}
{{val|0.098|0.015}}
| spectral_type = X/D {{small|(Pan-STARRS)}}
X/D {{small|(SDSS-MOC)}}
C {{small|(assumed)}}
| abs_magnitude = 11.0
11.1
{{val|11.54|0.33}}
}}
10247 Amphiaraos {{IPAc-en|ˌ|æ|m|f|i|ə|'|r|eɪ|ə|s}} is Jupiter trojan from the Greek camp, approximately {{convert|27|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 24 September 1960, by Dutch astronomers Ingrid and Cornelis van Houten at Leiden, and Tom Gehrels at the Palomar Observatory in California. The X/D-type asteroid has a long rotation period of 34.26 hours and possibly an elongated shape. It was named after the seer Amphiaraus (Amphiaraos) from Greek mythology.
Orbit and classification
Amphiaraos is a Jovian asteroid orbiting in the leading Greek camp at Jupiter's {{L4}} Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is a non-family asteroid in the Jovian background population. It orbits the Sun at a distance of 5.2–5.3 AU once every 12 years and 1 month (4,410 days; semi-major axis of 5.26 AU). Its orbit has an eccentricity of 0.01 and an inclination of 4° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Palomar in September 1960.
= Palomar–Leiden survey =
The survey designation "P-L" stands for Palomar–Leiden, named after Palomar Observatory and Leiden Observatory, which collaborated on the fruitful Palomar–Leiden survey in the 1960s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Ingrid and Cornelis van Houten at Leiden Observatory where astrometry was carried out. The trio are credited with the discovery of several thousand asteroid discoveries.
Physical characteristics
Amphiaraos has been characterized as an X and D-type asteroid in the SDSS-based taxonomy, and by Pan-STARRS' survey. It is also an assumed C-type.
= Rotation period =
In March 2012, a rotational lightcurve of Amphiaraos was obtained from photometric observations by Robert Stephens, Daniel Coley and Ralph Megna at the Goat Mountain Astronomical Research Station {{Obscode|G79}} in California. Lightcurve analysis gave a longer-than average rotation period of 34.26 hours with a brightness amplitude of 0.55 magnitude ({{small|U=2}}).
= Diameter and albedo =
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Amphiaraos measures 26.83 kilometers in diameter and its surface has an albedo of 0.098, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 33.54 kilometers based on an absolute magnitude of 11.1.
Naming
This minor planet was named after the Greek seer Amphiaraus (Amphiaraos), who was the king of Argos. He was one of the Seven against Thebes. The official {{MoMP|10247|naming citation}} was published by the Minor Planet Center on 24 January 2000 ({{small|M.P.C. 38199}}).
References
{{reflist|30em|refs=
|type = 2017-09-27 last obs.
|title = JPL Small-Body Database Browser: 10247 Amphiaraos (6629 P-L)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010247
|publisher = Jet Propulsion Laboratory
|accessdate = 31 May 2018}}
|title = 10247 Amphiaraos (6629 P-L)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=10247
|accessdate = 31 May 2018}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|accessdate = 31 May 2018}}
|title = List of Jupiter Trojans
|work = Minor Planet Center
|date = 2 February 2018
|url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html
|accessdate = 31 May 2018}}
|title = Minor Planet Discoverers
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/lists/MPDiscsNum.html
|date = 2018
|accessdate = 31 May 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
}}
|title = Asteroid 10247 Amphiaraos
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=10247+Amphiaraos
|accessdate = 31 May 2018
|archive-date = 19 August 2020
|archive-url = https://web.archive.org/web/20200819074216/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=10247%20Amphiaraos
|url-status = dead
}}
|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 = Asteroid (10247) Amphiaraos
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?n=10247&pc=1.1.6
|accessdate = 31 May 2018}}
|title = LCDB Data for (10247) Amphiaraos
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=10247%7CAmphiaraos
|accessdate = 31 May 2018}}
|display-authors = 6
|first1 = A. |last1 = Mainzer
|first2 = T. |last2 = Grav
|first3 = J. |last3 = Masiero
|first4 = E. |last4 = Hand
|first5 = J. |last5 = Bauer
|first6 = D. |last6 = Tholen
|first7 = R. S. |last7 = McMillan
|first8 = T. |last8 = Spahr
|first9 = R. M. |last9 = Cutri
|first10 = E. |last10 = Wright
|first11 = J. |last11 = Watkins
|first12 = W. |last12 = Mo
|first13 = C. |last13 = Maleszewski
|date = November 2011
|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 25
|bibcode = 2011ApJ...741...90M
|doi = 10.1088/0004-637X/741/2/90
|arxiv = 1109.6407
|s2cid = 118700974 }} ([http://iopscience.iop.org/0004-637X/741/2/68/fulltext/apj398969t1_mrt.txt catalog])
|first1 = Linda M. |last1 = French
|first2 = Robert D. |last2 = Stephens
|first3 = Daniel R. |last3 = Coley
|first4 = Ralph |last4 = Megna
|first5 = Lawrence H. |last5 = Wasserman
|date = July 2012
|title = Photometry of 17 Jovian Trojan Asteroids
|journal = The Minor Planet Bulletin
|volume = 39
|issue = 3
|pages = 183–187
|issn = 1052-8091
|bibcode = 2012MPBu...39..183F}}
|display-authors = 6
|first1 = Peter |last1 = Veres
|first2 = Robert |last2 = Jedicke
|first3 = Alan |last3 = Fitzsimmons
|first4 = Larry |last4 = Denneau
|first5 = Mikael |last5 = Granvik
|first6 = Bryce |last6 = Bolin
|first7 = Serge |last7 = Chastel
|first8 = Richard J. |last8 = Wainscoat
|first9 = William S. |last9 = Burgett
|first10 = Kenneth C. |last10 = Chambers
|first11 = Heather |last11 = Flewelling
|first12 = Nick |last12 = Kaiser
|first13 = Eugen A. |last13 = Magnier
|first14 = Jeff S. |last14 = Morgan
|first15 = Paul A. |last15 = Price
|first16 = John L. |last16 = Tonry
|first17 = Christopher |last17 = Waters
|date = November 2015
|title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 – Preliminary results
|journal = Icarus
|volume = 261
|pages = 34–47
|bibcode = 2015Icar..261...34V
|doi = 10.1016/j.icarus.2015.08.007
|arxiv = 1506.00762|s2cid = 53493339 }}
}}
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/NumberedMPs010001.html Discovery Circumstances: Numbered Minor Planets (10001)-(15000)] – Minor Planet Center
- {{AstDys|10247}}
- {{JPL small body}}
{{Minor planets navigator |10246 Frankenwald |number=10247 |10248 Fichtelgebirge}}
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{{DEFAULTSORT:Amphiaraos}}
Category:Discoveries by Cornelis Johannes van Houten
Category:Discoveries by Ingrid van Houten-Groeneveld