2143 Jimarnold
{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 2143 Jimarnold
| background = #D6D6D6
| image =
| image_size =
| caption =
| discoverer = E. F. Helin
| discovery_site = Palomar Obs.
| discovered = 26 September 1973
| mpc_name = (2143) Jimarnold
| alt_names = 1973 SA{{·}}{{mp|1980 VZ|1}}
| pronounced =
| named_after = James R. Arnold
{{small|(American chemist)}}
| mp_category = main-belt{{·}}{{small|(inner)}}
background
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 62.13 yr (22,693 d)
| aphelion = 2.8147 AU
| perihelion = 1.7468 AU
| semimajor = 2.2807 AU
| eccentricity = 0.2341
| period = 3.44 yr (1,258 days)
| mean_anomaly = 270.79°
| mean_motion = {{Deg2DMS|0.2861|sup=ms}} / day
| inclination = 8.3651°
| asc_node = 17.405°
| arg_peri = 352.42°
| dimensions = {{val|4.934|0.145}} km
| rotation =
| albedo = {{val|0.138|0.017}}
| spectral_type =
}}
2143 Jimarnold, provisional designation {{mp|1973 SA}}, is a background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 26 September 1973, by astronomer Eleanor Helin at the Palomar Observatory in California, United States. The asteroid was named after American cosmochemist, James R. Arnold.
Orbit and classification
Jimarnold is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 1.7–2.8 AU once every 3 years and 5 months (1,258 days; semi-major axis of 2.28 AU). Its orbit has an eccentricity of 0.23 and an inclination of 8° with respect to the ecliptic.
The body's observation arc begins with a precovery taken at Palomar in April 1954, almost two decades prior to its official discovery observation.
Physical characteristics
= Diameter and albedo =
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Jimarnold measures 4.934 kilometers in diameter and its surface has an albedo of 0.138.
= Rotation period =
As of 2017, no rotational lightcurve of Jimarnold has been obtained from photometric observations. The body's rotation period, poles and shape remain unknown.
Naming
This minor planet was named after James R. Arnold (1923–2012), professor of chemistry and director of California Space Science Institute at the University of California, San Diego. Arnold's cosmochemical research included the study of cosmic radiation, the origin of meteorites, for which he developed a computer model, the lunar soil and mapping of the Moon's composition. The official {{MoMP|2143|naming citation}} was proposed by the discoverer and Eugene Shoemaker, and published by the Minor Planet Center on 1 July 1979 ({{small|M.P.C. 4788}}).
In 2013, Arnold's son proposed that the interrobang ‽ be used as a symbol for the asteroid, reflecting his father's curiosity and his "insistence upon working with the resulting reality".Ken Arnold, "Symbol for an asteroid?", Eclectifying, 25 February 2013.[http://peak.im/ken/2013/02/25/60/]
References
{{reflist|30em|refs=
|type = 2017-06-02 last obs.
|title = JPL Small-Body Database Browser: 2143 Jimarnold (1973 SA)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002143
|publisher = Jet Propulsion Laboratory
|access-date = 6 December 2017}}
|title = Dictionary of Minor Planet Names – (2143) Jimarnold
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 174
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_2144 |chapter = (2143) Jimarnold }}
|title = 2143 Jimarnold (1973 SA)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2143
|access-date = 6 December 2017}}
|title = Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008)
|chapter = Appendix – Publication Dates of the MPCs
|last = Schmadel |first=Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 221
|isbn = 978-3-642-01964-7
|doi = 10.1007/978-3-642-01965-4}}
|title = Asteroid 2143 Jimarnold – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=2143
|access-date= 29 October 2019}}
|display-authors = 6
|first1 = Joseph R. |last1 = Masiero
|first2 = A. K. |last2 = Mainzer
|first3 = T. |last3 = Grav
|first4 = J. M. |last4 = Bauer
|first5 = R. M. |last5 = Cutri
|first6 = J. |last6 = Dailey
|first7 = P. R. M. |last7 = Eisenhardt
|first8 = R. S. |last8 = McMillan
|first9 = T. B. |last9 = Spahr
|first10 = M. F. |last10 = Skrutskie
|first11 = D. |last11 = Tholen
|first12 = R. G. |last12 = Walker
|first13 = E. L. |last13 = Wright
|first14 = E. |last14 = DeBaun
|first15 = D. |last15 = Elsbury
|first16 = T. IV |last16 = Gautier
|first17 = S. |last17 = Gomillion
|first18 = A. |last18 = Wilkins
|date = November 2011
|title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 20
|bibcode = 2011ApJ...741...68M
|doi = 10.1088/0004-637X/741/2/68
|arxiv = 1109.4096
|access-date= 6 December 2017}}
|title = LCDB Data for (2143) Jimarnold
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2143%7CJimarnold
|access-date = 6 December 2017}}
}}
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
- [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
- [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
- {{AstDys|2143}}
- {{JPL small body}}
{{Minor planets navigator |2142 Landau |number=2143 |2144 Marietta}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Jimarnold}}