1392 Pierre
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 1392 Pierre
| background = #D6D6D6
| image =
| image_size =
| caption =
| discoverer = L. Boyer
| discovery_site = Algiers Obs.
| discovered = 16 March 1936
| mpc_name = (1392) Pierre
| alt_names = 1936 FO{{·}}1938 SZ
1955 TZ{{·}}1959 SH
A917 UB
| pronounced =
| named_after = Pierre {{small|(discoverer's nephew)}}
| mp_category = main-belt{{·}}{{small|(middle)}}
{{nowrap|Eunomia{{·}}background}}
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 81.30 yr (29,695 days)
| aphelion = 3.1355 AU
| perihelion = 2.0788 AU
| semimajor = 2.6071 AU
| eccentricity = 0.2026
| period = 4.21 yr (1,538 days)
| mean_anomaly = 244.35°
| mean_motion = {{Deg2DMS|0.2341|sup=ms}} / day
| inclination = 12.263°
| asc_node = 358.24°
| arg_peri = 44.290°
| mean_diameter = {{val|26.16|0.34|ul=km}}
{{val|26.44|1.6|u=km}}
{{val|27.02|5.29|u=km}}
{{val|28.94|8.81|u=km}}
| albedo = {{val|0.04|0.01}}
{{val|0.04|0.02}}
{{val|0.0519|0.007}}
{{val|0.054|0.002}}
| spectral_type = Tholen {{=}} DX{{·}}C
B–V {{=}} 0.757
U–B {{=}} 0.258
}}
1392 Pierre, provisional designation {{mp|1936 FO}}, is a dark, dynamical Eunomian asteroid from the central regions of the asteroid belt, approximately {{convert|26|km|mi|sigfig=2|sp=us}} in diameter. It was discovered on 16 March 1936, by astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. The asteroid was named after the discoverer's nephew, Pierre.
Orbit and classification
Pierre is a dynamical member of the Eunomia family ({{small|502}}), a prominent family of stony asteroids and the largest one in the intermediate main belt with more than 5,000 members. Pierre{{'}}s spectral type is different from that of the Eunomia family (see below) and possibly an interloper rather than a true family member. When applying the hierarchical clustering method to its proper orbital elements, Pierre is a non-family asteroid of the main belt's background population.
It orbits the Sun in the central main-belt at a distance of 2.1–3.1 AU once every 4 years and 3 months (1,538 days). Its orbit has an eccentricity of 0.20 and an inclination of 12° with respect to the ecliptic. The asteroid was first observed as {{mp|A917 UB}} at Simeiz Observatory in October 1917. The body's observation arc begins with its official discovery observation at Algiers in March 1936.
Naming
This minor planet was named after Pierre, a nephew of the discoverer Louis Boyer. The official {{MoMP|1392|naming citation}} was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 126}}).
Physical characteristics
Pierre has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey. In the Tholen classification, the asteroid's spectral type is ambiguous, closest to a dark D-type and somewhat similar to a generic X-type asteroid. Conversely, the Eunomia family consists of S-type asteroids.{{rp|23}}
= Rotation period =
In August 1984, a first rotational lightcurve of Pierre was obtained from photometric observations with the ESO 1-metre telescope at the La Silla Observatory in Chile. Lightcurve analysis gave a rotation period of 18 hours with a brightness variation of 0.09 magnitude ({{small|U=2}}). A poorly rated lightcurve by Pierre Antonini in January 2007, gave a period of 24 hours with an amplitude of 0.05 magnitude.
= Diameter and albedo =
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Pierre measures between 26.16 and 28.94 kilometers in diameter and its surface has an albedo between 0.04 and 0.054. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0519 and a diameter of 26.44 kilometers based on an absolute magnitude of 11.72.
References
{{reflist|30em|refs=
|type = 2017-07-04 last obs.
|title = JPL Small-Body Database Browser: 1392 Pierre (1936 FO)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001392
|publisher = Jet Propulsion Laboratory
|accessdate = 26 October 2017}}
|last = Schmadel | first = Lutz D.
|title = Dictionary of Minor Planet Names |publisher = Springer Berlin Heidelberg
|page = 112
|date = 2007
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_1393 |chapter = (1392) Pierre }}
|title = 1392 Pierre (1936 FO)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1392
|accessdate = 26 October 2017}}
|title = Asteroids and comets rotation curves – (1392) Pierre
|last = Behrend |first = Raoul
|publisher = Geneva Observatory
|url = http://obswww.unige.ch/~behrend/page4cou.html#001392
|accessdate = 26 October 2017}}
|title = Asteroid 1392 Pierre – Asteroid Dynamical Families V4.1
|work = Small Bodies Data Ferret
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|accessdate = 29 October 2019}}
|title = Asteroid 1392 Pierre – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1392
|access-date= 29 October 2019}}
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|doi = 10.2458/azu_uapress_9780816532131-ch016
|arxiv = 1502.01628
|isbn = 9780816532131}}
|title = LCDB Data for (1392) Pierre
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1392%7CPierre
|accessdate = 26 October 2017}}
|display-authors = 6
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|arxiv = 1509.02522
|access-date= 26 October 2017}}
|display-authors = 6
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|date = September 2016
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|journal = The Astronomical Journal
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|bibcode = 2016AJ....152...63N
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|arxiv = 1606.08923
|doi-access = free }}
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|title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey
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|display-authors = 6
|first1 = Peter |last1 = Veres
|first2 = Robert |last2 = Jedicke
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|first4 = Larry |last4 = Denneau
|first5 = Mikael |last5 = Granvik
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}}
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|1392}}
- {{JPL small body}}
{{Minor planets navigator |1391 Carelia |number=1392 |1393 Sofala}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Pierre}}