View source for Astronomy:(82158) 2001 FP185

{{DISPLAYTITLE:{{mp|(82158) 2001 FP|185}}}}
{{Infobox planet
 | minorplanet     = yes
 | name            = {{mp|(82158) 2001 FP|185}}
 | background      = #C2E0FF
 | image           = Η τροχιά του (82158) 2001 FP185.gif
 | image_size      = 
 | caption         = 
 | discovery_ref   = <ref name="jpldata" /><ref name="MPC-object" />
 | discovered      = 26 March 2001
 | discoverer      = [[Biography:Marc Buie|M. W. Buie]]
 | discovery_site  = [[Astronomy:Kitt Peak National Observatory|Kitt Peak National Obs.]]
 | mpc_name        = {{mp|(82158) 2001 FP|185}}
 | alt_names       = {{mp|2001 FP|185}}
 | pronounced      = 
 | named_after     = <!--named-after<br />{{small|()}}-->
 | mp_category     = [[Astronomy:Trans-Neptunian object|TNO]]<ref name="jpldata" />{{·}}SDO<ref name="johnstonsarchive-TNO-list" />{{·}}[[Astronomy:Distant minor planet|distant]]<ref name="MPC-object" />
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 4 September 2017 ([[Astronomy:Julian day|JD]] 2458000.5)
 | uncertainty     = 2
 | observation_arc = 16.25 yr (5,937 days)
 | aphelion        = 420.18 [[Astronomy:Astronomical unit|AU]]
 | perihelion      = 34.280 AU
 | semimajor       = 227.23 AU
 | eccentricity    = 0.8491
 | period          = 3425.31 [[Astronomy:Julian year|yr]] (1,251,096 days)
 | mean_anomaly    = 1.4289[[Degree (angle)|°]]
 | mean_motion     = {{Deg2DMS|0.0003|sup=ms}} / day
 | inclination     = 30.763°
 | asc_node        = 179.31°
 | arg_peri        = 7.1638°
 | dimensions      = 222.59 km {{small|(derived)}}<ref name="lcdb" /><br />{{val|332|31}} km<ref name="johnstonsarchive-TNO-list" /><ref name="Santos-Sanz-2012" /><br />336 km {{small|(radiometric)}}<ref name="Brown-DP-list" />
 | rotation        =  
 | albedo          = {{val|0.046|0.007}}<ref name="Santos-Sanz-2012" /><br />0.05 {{small|(radiometric)}}<ref name="Brown-DP-list" /><br />0.10 {{small|(assumed)}}<ref name="lcdb" />
 | spectral_type   = IR<ref name="johnstonsarchive-TNO-list" /><ref name="Belskaya-2015" />{{·}}[[Astronomy:C-type asteroid|C]]<ref name="lcdb" /><br />B–R = 1.38<ref name="johnstonsarchive-TNO-list" /><br />B–V = {{val|0.860|0.040}}<ref name="Jewitt-2007" />{{·}}{{val|0.820|0.048}}<ref name="Hainaut-2012" />{{·}}{{val|0.820|0.020}}<ref name="Belskaya-2015" /><br />V–R = {{val|0.520|0.040}}<ref name="Jewitt-2007" />{{·}}{{val|0.572|0.038}}<ref name="Hainaut-2012" />{{·}}{{val|0.580|0.020}}<ref name="Belskaya-2015" /><br />V–I = {{val|1.070|0.060}}<ref name="Jewitt-2007" />{{·}}{{val|1.013|0.072}}<ref name="Hainaut-2012" />{{·}}{{val|1.060|0.010}}<ref name="Belskaya-2015" />
 | abs_magnitude   = {{val|5.94|0.03}} {{small|(R)}}<ref name="Jewitt-2007" />{{·}}{{val|5.940|0.053}} {{small|(R)}}<ref name="Peixinho-2012" />{{·}}6.2<ref name="jpldata" />{{·}}6.38<ref name="lcdb" /><ref name="Romanishin-2005" />{{·}}6.4<ref name="Brown-DP-list" />
}}

'''{{mp|(82158) 2001 FP|185}}''' (provisional designation '''{{mp|2001 FP|185}}''') is a highly eccentric [[Astronomy:Trans-Neptunian object|trans-Neptunian object]] from the [[Astronomy:Scattered disc|scattered disc]] in the outermost part of the [[Astronomy:Solar System|Solar System]], approximately 330 kilometers in diameter. It was discovered on 26 March 2001, by American astronomer [[Biography:Marc Buie|Marc Buie]] at [[Astronomy:Kitt Peak National Observatory|Kitt Peak National Observatory]] in Arizona, United States.<ref name="MPC-object" />

== Orbit and classification ==
{{mp|2001 FP|185}} is a scattered-disc object which belong to the most distant and coldest objects in the Solar System and are thought to be source of most periodic comets.

It orbits the Sun at a distance of 34.3–420.2&nbsp;[[Astronomy:Astronomical unit|AU]] once every 3425 years and 4 months (1,251,096 days). Its orbit has an [[Astronomy:Orbital eccentricity|eccentricity]] of 0.85 and an [[Astronomy:Orbital inclination|inclination]] of 31[[Degree (angle)|°]] with respect to the [[Astronomy:Ecliptic|ecliptic]].<ref name="jpldata" /> A first [[Astronomy:Precovery|precovery]] was taken by the [[Astronomy:Sloan Digital Sky Survey|Sloan Digital Sky Survey]] in March 1999, extending the body's [[Astronomy:Observation arc|observation arc]] by 2 years prior to its official discovery observation at Kitt Peak.<ref name="MPC-object" />

=== ''Planet Nine'' co-orbital ===
If a massive [[Astronomy:Trans-Neptunian object|trans-Neptunian object]] exists, like hypothetical ''[[Astronomy:Planet Nine|Planet Nine]]'', {{mp|2001 FP|185}} may be [[Astronomy:Co-orbital configuration|co-orbital]] with it.<ref name="Fuente-Marcos-2014" /><ref name="Fuente-Marcos-2015" />

== Physical characteristics ==

=== Spectra and colors ===
{{mp|2001 FP|185}}'s [[Astronomy:Trans-Neptunian object#Colours|color]] has extensively been measured.<ref name="Belskaya-2015" /><ref name="Jewitt-2007" /><ref name="Hainaut-2012" /> The object has a determined [[Astronomy:Trans-Neptunian object#Spectra|BR and IR spectra]], which are intermediate classes of the very blue BB and very red RR spectra.<ref name="johnstonsarchive-TNO-list" /><ref name="Belskaya-2015" />

=== Diameter and albedo ===
According to astronomer Michael Brown and based on [[Astronomy:Radio astronomy|radiometric observations]], {{mp|2001 FP|185}} measures 336 kilometers in diameter and its surface has an (assumed) [[Astronomy:Astronomical albedo|albedo]] of 0.05.<ref name="Brown-DP-list" /> Observations with the [[Astronomy:Herschel Space Observatory#PACS|PACS]]-instrument of the [[Astronomy:Herschel Space Observatory|Herschel Space Observatory]] during a survey of scattered-disc objects ("TNO are cool") found a similar diameter of 332 kilometer with an albedo of 0.046.<ref name="Santos-Sanz-2012" /> The ''Collaborative Asteroid Lightcurve Link'' assumes a higher albedo of 0.10 and consequently derives a much shorter diameter of 222 kilometers based on an [[Astronomy:Absolute magnitude|absolute magnitude]] of 6.38.<ref name="lcdb" /> Brown considers {{mp|2001 FP|185}} to be [[Astronomy:List of possible dwarf planets|possibly a dwarf planet]] ''(see [[Astronomy:List of possible dwarf planets#list|list]])''.<ref name="Brown-DP-list" />

=== Lightcurve ===
No rotational [[Astronomy:Lightcurve|lightcurve]] of {{mp|2001 FP|185}} has been obtained from photometric observations. The body's [[Rotation period|rotation period]], pole axis and brightness amplitude remains unknown.<ref name="lcdb" />

== Numbering and naming ==
This [[Astronomy:Minor planet|minor planet]] was [[Astronomy:Minor planet designation|numbered]] by the [[Organization:Minor Planet Center|Minor Planet Center]] on 4 May 2004.<ref name="MPC-Circulars-Archive" /> As of 2018, it has not been [[Astronomy:List of named minor planets (alphabetical)|named]].<ref name="MPC-object" />

== See also ==
* List of Solar System objects by greatest aphelion

== References ==
{{reflist|refs=

<ref name="jpldata">{{cite web
  |type       = 2015-06-22 last obs.
  |title      = JPL Small-Body Database Browser: 82158 (2001 FP185)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2082158
  |publisher  = [[Organization:Jet Propulsion Laboratory|Jet Propulsion Laboratory]]
  |accessdate = 2 August 2017}}</ref>

<ref name="MPC-object">{{cite web
  |title      = 82158 (2001 FP185)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=82158
  |accessdate = 2 August 2017}}</ref>

<ref name="MPC-Circulars-Archive">{{cite web
  |title      = MPC/MPO/MPS Archive
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
  |accessdate = 24 February 2018}}</ref>

<ref name="Fuente-Marcos-2014">{{Cite journal
  |first1     = C. |last1 = de la Fuente Marcos
  |first2     = R. |last2 = de la Fuente Marcos
  |date       = September 2014
  |title      = Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets
  |journal    = Monthly Notices of the Royal Astronomical Society: Letters
  |volume     = 443
  |issue      = 1
  |pages      = L59–L63
  |bibcode    = 2014MNRAS.443L..59D
  |doi        = 10.1093/mnrasl/slu084
  |arxiv      = 1406.0715
  |s2cid = 118622180
 }}</ref>

<ref name="Fuente-Marcos-2015">{{Cite journal
  |first1     = Carlos |last1 = de la Fuente Marcos
  |first2     = Raú |last2 = de la Fuente Marcos
  |last3 = l
  |first4     = Sverre J. |last4 = Aarseth
  |date       = January 2015
  |title      = Flipping minor bodies: what comet 96P/Machholz 1 can tell us about the orbital evolution of extreme trans-Neptunian objects and the production of near-Earth objects on retrograde orbits
  |journal    = Monthly Notices of the Royal Astronomical Society
  |volume     = 446
  |issue      = 2
  |pages      = 1867–1873
  |bibcode    = 2015MNRAS.446.1867D
  |doi        = 10.1093/mnras/stu2230
  |arxiv      = 1410.6307
  |s2cid = 119256764
 }}</ref>

<ref name="johnstonsarchive-TNO-list">{{cite web
  |title      = List of Known Trans-Neptunian Objects
  |publisher  = Johnston's Archive
  |date       = 22 July 2017
  |url        = http://www.johnstonsarchive.net/astro/tnoslist.html
  |accessdate = 2 August 2017}}</ref>

<ref name="Brown-DP-list">{{cite web
 |title       = How many dwarf planets are there in the outer solar system?
 |work        = Mike Brown
 |url         = http://web.gps.caltech.edu/~mbrown/dps.html
 |accessdate  = 2 August 2017}}</ref>

<ref name="lcdb">{{cite web
  |title      = LCDB Data for (82158) 
  |publisher  = Asteroid Lightcurve Database (LCDB)
  |url        = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=82158%7C
  |accessdate = 2 August 2017}}</ref>

<ref name="Santos-Sanz-2012">{{Cite journal
  |display-authors = 6
  |first1     = P. |last1 = Santos-Sanz
  |first2     = E. |last2 = Lellouch
  |first3     = S. |last3 = Fornasier
  |first4     = C. |last4 = Kiss
  |first5     = A. |last5 = Pal
  |first6     = T. G. |last6 = Müller
  |first7     = E. |last7 = Vilenius
  |first8     = J. |last8 = Stansberry
  |first9     = M. |last9 = Mommert
  |first10    = A. |last10 = Delsanti
  |first11    = M. |last11 = Mueller
  |first12    = N. |last12 = Peixinho
  |first13    = F. |last13 = Henry
  |first14    = J. L. |last14 = Ortiz
  |first15    = A. |last15 = Thirouin
  |first16    = S. |last16 = Protopapa
  |first17    = R. |last17 = Duffard
  |first18    = N. |last18 = Szalai
  |first19    = T. |last19 = Lim
  |first20    = C. |last20 = Ejeta
  |first21    = P. |last21 = Hartogh
  |first22    = A. W. |last22 = Harris
  |first23    = M. |last23 = Rengel
  |date       = May 2012
  |title      = "TNOs are Cool": A survey of the trans-Neptunian region. IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel-PACS
  |journal    = Astronomy and Astrophysics
  |volume     = 541
  |page       = 18
  |bibcode    = 2012A&A...541A..92S
  |doi        = 10.1051/0004-6361/201118541
  |arxiv      = 1202.1481
  |s2cid = 118600525 }}</ref>

<ref name="Romanishin-2005">{{Cite journal
  |first1     = W. |last1 = Romanishin
  |first2     = S. C. |last2 = Tegler
  |date       = December 2005
  |title      = Accurate absolute magnitudes for Kuiper belt objects and Centaurs
  |journal    = Icarus
  |volume     = 179
  |issue      = 2
  |pages      = 523–526
  |bibcode    = 2005Icar..179..523R
  |doi        = 10.1016/j.icarus.2005.06.016
  }}</ref>

<ref name="Jewitt-2007">{{Cite journal
  |first1     = David |last1 = Jewitt
  |first2     = Nuno |last2 = Peixinho
  |first3     = Henry H. |last3 = Hsieh
  |date       = November 2007
  |title      = U-Band Photometry of Kuiper Belt Objects
  |journal    = The Astronomical Journal
  |volume     = 134
  |issue      = 5
  |pages      = 2046–2053
  |bibcode    = 2007AJ....134.2046J
  |doi        = 10.1086/522787
  |doi-access= free
  }}</ref>

<ref name="Peixinho-2012">{{cite journal
  |first1     = N. |last1 = Peixinho
  |first2     = A. |last2 = Delsanti
  |first3     = A. |last3 = Guilbert-Lepoutre
  |first4     = R. |last4 = Gafeira
  |first5     = P. |last5 = Lacerda
  |date       = October 2012
  |title      = The bimodal colors of Centaurs and small Kuiper belt objects
  |journal    = Astronomy and Astrophysics
  |volume     = 546
  |page       = 12
  |bibcode    = 2012A&A...546A..86P
  |doi        = 10.1051/0004-6361/201219057
  |arxiv = 1206.3153
  |s2cid = 55876118
 }}</ref>

<ref name="Belskaya-2015">{{Cite journal
  |first1     = Irina N. |last1 = Belskaya
  |first2     = Maria A. |last2 = Barucci
  |first3     = Marcello |last3 = Fulchignoni
  |first4     = Anatolij N. |last4 = Dovgopol
  |date       = April 2015
  |title      = Updated taxonomy of trans-neptunian objects and centaurs: Influence of albedo
  |journal    = Icarus
  |volume     = 250
  |pages      = 482–491
  |bibcode    = 2015Icar..250..482B
  |doi        = 10.1016/j.icarus.2014.12.004
  }}</ref>

<ref name="Hainaut-2012">{{Cite journal
  |first1     = O. R. |last1 = Hainaut
  |first2     = H. |last2 = Boehnhardt
  |first3     = S. |last3 = Protopapa
  |date       = October 2012
  |title      = Colours of minor bodies in the outer solar system. II. A statistical analysis revisited
  |journal    = Astronomy and Astrophysics
  |volume     = 546
  |page       = 20
  |bibcode    = 2012A&A...546A.115H
  |doi        = 10.1051/0004-6361/201219566
  |arxiv      = 1209.1896
  |s2cid = 54776793
 }}</ref>

}} <!-- end of reflist -->

== External links ==
* [https://www.minorplanetcenter.net/iau/lists/t_centaurs.html List Of Centaurs and Scattered-Disk Objects], Minor Planet Center
* [https://www.minorplanetcenter.net/iau/lists/NumberedMPs080001.html Discovery Circumstances: Numbered Minor Planets (80001)-(85000)] – Minor Planet Center
* {{AstDys|82158}}
* {{JPL small body}}

{{Minor planets navigator | |number=82158 |PageName={{mp|(82158) 2001 FP|185}} | }}
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{{DEFAULTSORT:2001 FP185}}
[[Category:Extreme trans-Neptunian objects|082158]]

{{Sourceattribution|(82158) 2001 FP185}}