# 19139 Apian > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/19139_Apian > Markdown URL: https://mediated.wiki/source/19139_Apian.md > Source: https://en.wikipedia.org/wiki/19139_Apian > Source revision: 1346057292 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) Asteroid 19139 Apian Discovery[1] Discovered by F. Börngen Discovery site Karl Schwarzschild Obs. Discovery date 6 April 1989 Designations Named after Petrus Apianus[2][3] (German humanist) Alternative designations 1989 GJ8 · 1999 XP18 Minor planet category main-belt · (middle) background[4] Orbital characteristics[1] Epoch 4 September 2017 (JD 2458000.5) Uncertainty parameter 0 Observation arc 28.09 yr (10,261 days) Aphelion 2.7824 AU Perihelion 2.3841 AU Semi-major axis 2.5832 AU Eccentricity 0.0771 Orbital period (sidereal) 4.15 yr (1,516 days) Mean anomaly 105.06° Mean motion 0° 14m 14.64s / day Inclination 8.0241° Longitude of ascending node 48.222° Argument of perihelion 336.68° Physical characteristics Dimensions 5.643±0.089 km[5] Geometric albedo 0.265±0.039[5] Absolute magnitude (H) 13.5[1] **19139 Apian** ([provisional designation](/source/Minor_planet_provisional_designation) **1989 GJ8**) is a bright background [asteroid](/source/Asteroid) from the central regions of the [asteroid belt](/source/Asteroid_belt), approximately 6 kilometers in diameter. It was discovered on 6 April 1989, by German astronomer [Freimut Börngen](/source/Freimut_B%C3%B6rngen) at the [Karl Schwarzschild Observatory](/source/Karl_Schwarzschild_Observatory) in Tautenburg, Eastern Germany. The asteroid was named for medieval German humanist [Petrus Apianus](/source/Petrus_Apianus).[2][3] ## Orbit and classification Apian is a non-[family](/source/Asteroid_family) asteroid from the main belt's [background population](/source/Background_asteroid).[4] It orbits the Sun in the [central](/source/Kirkwood_gap) asteroid belt at a distance of 2.4–2.8 [AU](/source/Astronomical_unit) once every 4 years and 2 months (1,516 days; [semi-major axis](/source/Semi-major_axis) of 2.58 AU). Its orbit has an [eccentricity](/source/Orbital_eccentricity) of 0.08 and an [inclination](/source/Orbital_inclination) of 8[°](/source/Degree_(angle)) with respect to the [ecliptic](/source/Ecliptic).[1] The body's [observation arc](/source/Observation_arc) begins with a [precovery](/source/Precovery) published in the [Digitized Sky Survey](/source/Digitized_Sky_Survey) and taken at [Palomar Observatory](/source/Palomar_Observatory) in February 1989, approximately 2 months prior to its official discovery observation at Tautenburg.[3] ## Physical characteristics The asteroid's [spectral type](/source/Asteroid_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](/source/Lightcurve) of Apian has been obtained from photometric observations. The asteroid's [rotation period](/source/Rotation_period), poles and shape remain unknown.[1][6] ### Diameter and albedo According to the survey carried out by the [NEOWISE](/source/NEOWISE) mission of NASA's [Wide-field Infrared Survey Explorer](/source/Wide-field_Infrared_Survey_Explorer), Apian measures 5.643 kilometers in diameter and its surface has an [albedo](/source/Astronomical_albedo) of 0.265.[5] ## Naming This [minor planet](/source/Minor_planet) was named after [Petrus Apianus](/source/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](/source/Sky_atlas) *[Astronomicum Caesareum](/source/Astronomicum_Caesareum)* published in 1540. The lunar crater [Apianus](/source/Apianus_(crater)) was also named in his honor.[2] The approved naming citation was published by the [Minor Planet Center](/source/Minor_Planet_Center) on 20 November 2002 ([M.P.C.](/source/Minor_Planet_Circulars) 47168).[7] ## References 1. ^ [***a***](#cite_ref-jpldata_1-0) [***b***](#cite_ref-jpldata_1-1) [***c***](#cite_ref-jpldata_1-2) [***d***](#cite_ref-jpldata_1-3) [***e***](#cite_ref-jpldata_1-4) ["JPL Small-Body Database Browser: 19139 Apian (1989 GJ8)"](https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2019139) (2017-03-17 last obs.). [Jet Propulsion Laboratory](/source/Jet_Propulsion_Laboratory). Retrieved 3 January 2018. 1. ^ [***a***](#cite_ref-springer_2-0) [***b***](#cite_ref-springer_2-1) [***c***](#cite_ref-springer_2-2) Schmadel, Lutz D. (2006). "(19139) Apian". *Dictionary of Minor Planet Names – (19139) Apian*. [Springer Berlin Heidelberg](/source/Springer_Berlin_Heidelberg). p. 856. [doi](/source/Doi_(identifier)):[10.1007/978-3-540-29925-7_9543](https://doi.org/10.1007%2F978-3-540-29925-7_9543). [ISBN](/source/ISBN_(identifier)) [978-3-540-00238-3](https://en.wikipedia.org/wiki/Special:BookSources/978-3-540-00238-3). 1. ^ [***a***](#cite_ref-MPC-object_3-0) [***b***](#cite_ref-MPC-object_3-1) [***c***](#cite_ref-MPC-object_3-2) ["19139 Apian (1989 GJ8)"](https://www.minorplanetcenter.net/db_search/show_object?object_id=19139). *Minor Planet Center*. Retrieved 3 January 2018. 1. ^ [***a***](#cite_ref-AstDys-object_4-0) [***b***](#cite_ref-AstDys-object_4-1) ["Asteroid 19139 Apian – Proper Elements"](https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=19139). AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019. 1. ^ [***a***](#cite_ref-Masiero-2011_5-0) [***b***](#cite_ref-Masiero-2011_5-1) [***c***](#cite_ref-Masiero-2011_5-2) Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). ["Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters"](http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M). *The Astrophysical Journal*. **741** (2): 20. [arXiv](/source/ArXiv_(identifier)):[1109.4096](https://arxiv.org/abs/1109.4096). [Bibcode](/source/Bibcode_(identifier)):[2011ApJ...741...68M](https://ui.adsabs.harvard.edu/abs/2011ApJ...741...68M). [doi](/source/Doi_(identifier)):[10.1088/0004-637X/741/2/68](https://doi.org/10.1088%2F0004-637X%2F741%2F2%2F68). Retrieved 3 January 2018. 1. **[^](#cite_ref-lcdb_6-0)** ["MinorPlanet.info: One Asteroid Information"](https://www.minorplanet.info/PHP/generateOneAsteroidInfo.php). Asteroid Lightcurve Database (LCDB). Retrieved 3 January 2018. Search using Number = "19139" 1. **[^](#cite_ref-MPC-Circulars-Archive_7-0)** ["MPC/MPO/MPS Archive"](https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html). *Minor Planet Center*. Retrieved 3 January 2018. ## External links - [Asteroid Lightcurve Database (LCDB)](http://www.minorplanet.info/PHP/lcdbsummaryquery.php), query form ([info](http://www.minorplanet.info/lightcurvedatabase.html) [Archived](https://web.archive.org/web/20110721225144/http://www.minorplanet.info/lightcurvedatabase.html) 21 July 2011 at the [Wayback Machine](/source/Wayback_Machine)) - [Dictionary of Minor Planet Names](https://books.google.com/books?id=aeAg1X7afOoC&pg), Google books - [Asteroids and comets rotation curves, CdR](http://obswww.unige.ch/~behrend/page_cou.html) – Observatoire de Genève, Raoul Behrend - [Discovery Circumstances: Numbered Minor Planets (15001)-(20000)](https://www.minorplanetcenter.net/iau/lists/NumberedMPs015001.html) – Minor Planet Center - [19139 Apian](https://newton.spacedys.com/astdys/index.php?n=19139&pc=1.1.0) at *AstDyS-2, Asteroids—Dynamic Site* - [Ephemeris](https://newton.spacedys.com/astdys/index.php?n=19139&pc=1.1.3.0) **·** [Observation prediction](https://newton.spacedys.com/astdys/index.php?n=19139&pc=1.1.4.0) **·** [Orbital info](https://newton.spacedys.com/astdys/index.php?n=19139&pc=1.1.1) **·** [Proper elements](https://newton.spacedys.com/astdys/index.php?n=19139&pc=1.1.6) **·** [Observational info](https://newton.spacedys.com/astdys/index.php?n=19139&pc=1.1.7.0) - [19139 Apian](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20019139) at the *[JPL Small-Body Database](/source/JPL_Small-Body_Database)* - [Close approach](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20019139&view=C) **·** [Discovery](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20019139&view=D) **·** [Ephemeris](https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=20019139) **·** [Orbit viewer](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20019139&view=V) **·** [Orbit parameters](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20019139&view=O) **·** [Physical parameters](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20019139&view=P) v t e Minor planets navigator 19139 Apian 19140 Jansmit v t e Small Solar System bodies Minor planets Designation Groups List Moon Meanings of names Asteroid Active Asteroid belt Family Jupiter trojan Near-Earth Amors Apollos Atens Atiras Spectral types Distant minor planet Centaur Neptune trojan Damocloid Trans-Neptunian object Detached Kuiper belt Oort cloud Scattered disc Comets Extinct Great Halley-type Hyperbolic/Parabolic Long-period Lost Near-parabolic Periodic Sungrazing Other Cosmic dust Meteoroids Space debris Authority control databases JPL SBDB MPC --- Adapted from the Wikipedia article [19139 Apian](https://en.wikipedia.org/wiki/19139_Apian) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/19139_Apian?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.