19139 Apian
{{Short description|Asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 19139 Apian
| background = #D6D6D6
| image =
| image_size =
| caption =
| discoverer = F. Börngen
| discovery_site = {{nowrap|Karl Schwarzschild Obs.}}
| discovered = 6 April 1989
| mpc_name = (19139) Apian
| alt_names = {{mp|1989 GJ|8}}{{·}}{{mp|1999 XP|18}}
| pronounced =
| named_after = Petrus Apianus
{{small|(German humanist)}}
| mp_category = main-belt{{·}}{{small|(middle)}}
background
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 28.09 yr (10,261 days)
| aphelion = 2.7824 AU
| perihelion = 2.3841 AU
| semimajor = 2.5832 AU
| eccentricity = 0.0771
| period = 4.15 yr (1,516 days)
| mean_anomaly = 105.06°
| mean_motion = {{Deg2DMS|0.2374|sup=ms}} / day
| inclination = 8.0241°
| asc_node = 48.222°
| arg_peri = 336.68°
| dimensions = {{val|5.643|0.089}} km
| rotation =
| albedo = {{val|0.265|0.039}}
| spectral_type =
}}
19139 Apian (provisional designation {{mp|1989 GJ|8}}) is a bright background asteroid from the central regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 6 April 1989, by German astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, Eastern Germany. The asteroid was named for medieval German humanist Petrus Apianus.
Orbit and classification
Apian is a non-family asteroid from the main belt's background population. It orbits the Sun in the central asteroid belt at a distance of 2.4–2.8 AU once every 4 years and 2 months (1,516 days; semi-major axis of 2.58 AU). Its orbit has an eccentricity of 0.08 and an inclination of 8° with respect to the ecliptic.
The body's observation arc begins with a precovery published in the Digitized Sky Survey and taken at Palomar Observatory in February 1989, approximately 2 months prior to its official discovery observation at Tautenburg.
Physical characteristics
The asteroid's spectral type is unknown. Based on its albedo (see below), it is a stony rather than carbonaceous asteroid.
= Rotation period =
As of 2018, no rotational lightcurve of Apian has been obtained from photometric observations. The asteroid's rotation period, poles and shape remain unknown.
= Diameter and albedo =
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Apian measures 5.643 kilometers in diameter and its surface has an albedo of 0.265.
Naming
This minor planet was named after Petrus Apianus (1495–1552), also known as Peter Apian, a German mathematician and cartographer, who also built astronomical instruments. He is best known for his sky atlas Astronomicum Caesareum published in 1540. The lunar crater Apianus was also named in his honor.
The approved naming citation was published by the Minor Planet Center on 20 November 2002 ({{small|M.P.C. 47168}}).
References
{{reflist|30em|refs=
|type = 2017-03-17 last obs.
|title = JPL Small-Body Database Browser: 19139 Apian (1989 GJ8)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2019139
|publisher = Jet Propulsion Laboratory
|access-date = 3 January 2018}}
|title = Dictionary of Minor Planet Names – (19139) Apian
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 856
|date = 2006
|isbn = 978-3-540-00238-3
|doi = 10.1007/978-3-540-29925-7_9543 |chapter = (19139) Apian }}
|title = 19139 Apian (1989 GJ8)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=19139
|access-date = 3 January 2018}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date = 3 January 2018}}
|title = Asteroid 19139 Apian – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=19139
|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= 3 January 2018}}
|title = LCDB Data for (19139) Apian
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=19139%7CApian
|access-date = 3 January 2018}}
}}
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/20110721225144/http://www.minorplanet.info/lightcurvedatabase.html |date=21 July 2011 }})
- [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/NumberedMPs015001.html Discovery Circumstances: Numbered Minor Planets (15001)-(20000)] – Minor Planet Center
- {{AstDys|19139}}
- {{JPL small body}}
{{Minor planets navigator | |number=19139 |19140 Jansmit}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Apian}}