编辑“︁2014 UZ224”︁

{{DISPLAYTITLE:{{mp|2014 UZ|224}}}}
{{Infobox planet
| background = #FFFFC0
| uncertainty = 7
| observation_arc = 699 日（1.91年）
| aphelion = {{Convert|180|AU|Tm|abbr=on|lk=on}} ± 12 (Q)
| period = 1136.42 [[儒略年|yr]]（415076 [[儒略年|d]]）
| mean_anomaly = 320.2683[[度 (角)|°]] (M)
| mean_motion = {{Deg2DMS|0.00086731|sup=ms}} /day (n)
| jupiter_moid = {{Convert|32.6882|AU|Tm|abbr=on}}
| dimensions = 420 [[公里|km]]（[[反照率]]假設為0.4） – 1180 km （反照率假設為0.05）
| density = 
| escape_velocity = 
| abs_magnitude = 3.5 ([[噴射推進實驗室小天體資料庫|JPL]]/[[小行星中心|MPC]])<ref name=jpldata/>
| minorplanet = yes
| name = {{mp|2014 UZ|224}}
| image = Orbit of 2014 UZ224.png
| caption = {{mp|2014 UZ|224}}軌道
| discovery_ref = <ref name="MPEC 2016-T104"/>
| discovered = 2014年8月19日<br>宣布：2016年10月11日
| mp_name = {{mp|2014 UZ|224}}
| mp_category = [[海王星外天體]]<br>[[離散盤]]
| orbit_ref = <ref name=jpldata/>
| epoch = 31 July 2016 ([[儒略日|JD]] 2457600.5)
| perihelion = {{Convert|37.97|AU|Tm|abbr=on}} ± 0.69 (q)
| semimajor = {{Convert|108.9|AU|Tm|abbr=on}} ± 7.4 (a)
| eccentricity = 0.65136 (e)
| avg_speed = 
| inclination = 26.7851° (i)
| asc_node = 131.1421° (Ω)
| arg_peri = 29.5472° (ω)
| satellites = 
| mass = 
| surface_grav = 
| sidereal_day = 
| albedo =
| spectral_type = 
| magnitude = 23.2
| moid = {{Convert|36.9998|AU|Tm|abbr=on}}
}}

'''{{mp|2014 UZ|224}}'''是一顆[[海王星外天體]]，並可能是位於[[離散盤]]的矮行星。2016年10月10日時，它距離太陽約91.6天文單位，並且在接近2142年時會到達距離太陽38天文單位的近日點。在媒體中它的暱稱為 DeeDee<ref>{{Cite web |url=https://www.wired.com/2016/10/dwarf-planets-arent-big-news-astronomy-great-job |title=Dwarf Planets Aren’t Big News, Because Astronomy Is Doing a Great Job |accessdate=2016-12-01 |archive-date=2017-06-15 |archive-url=https://web.archive.org/web/20170615115118/https://www.wired.com/2016/10/dwarf-planets-arent-big-news-astronomy-great-job/ |dead-url=no }}</ref><ref>{{Cite web |url=http://ns.umich.edu/new/releases/24284-new-dwarf-planet-solar-system-s-2nd-most-distant |title=New dwarf planet solar system's 2nd most distant |accessdate=2016-12-01 |archive-date=2017-06-28 |archive-url=https://web.archive.org/web/20170628195519/http://www.ns.umich.edu/new/releases/24284-new-dwarf-planet-solar-system-s-2nd-most-distant |dead-url=no }}</ref>。

2014 UZ224 是由[[暗能量巡天]]的暗能量望遠鏡（Dark Energy Camera，DECam）發現<ref>{{Cite news|url=https://www.scientificamerican.com/article/new-dwarf-planet-found-in-our-solar-system/?WT.mc_id=SA_FB_SPC_NEWS|title=New Dwarf Planet Found in Our Solar System|last=Cofield,SPACE.com|first=Calla|newspaper=Scientific American|access-date=2016-10-12|archive-date=2018-06-22|archive-url=https://web.archive.org/web/20180622005428/https://www.scientificamerican.com/article/new-dwarf-planet-found-in-our-solar-system/?WT.mc_id=SA_FB_SPC_NEWS|dead-url=no}}</ref><ref name=nprnewdwarf>{{Cite web
|url=http://www.npr.org/sections/thetwo-way/2016/10/11/497071139/a-friend-for-pluto-astronomers-find-new-dwarf-planet-in-our-solar-system
|title=A Friend For Pluto: Astronomers Find New Dwarf Planet In Our Solar System
|accessdate=2016-12-01
|archive-date=2021-01-22
|archive-url=https://web.archive.org/web/20210122003520/https://www.npr.org/sections/thetwo-way/2016/10/11/497071139/a-friend-for-pluto-astronomers-find-new-dwarf-planet-in-our-solar-system
|dead-url=no
}}</ref>。

==參見==
*{{link-en|最大遠日點的太陽系天體列表|List of Solar System objects by greatest aphelion}}

==參考資料==
{{reflist
| refs =
<ref name=jpldata>{{cite web
  |type=last observation: 2016-07-18; [[Observation arc|arc]]: 1.91 years
  |title=JPL Small-Body Database Browser: (2014 UZ224)
  |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2014UZ224
  |publisher=Jet Propulsion Laboratory
  |accessdate=11 October 2016
  |archive-date=2019-09-12
  |archive-url=https://web.archive.org/web/20190912002436/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2014UZ224
  |dead-url=no
  }}</ref>

<ref name="MPEC 2016-T104">{{cite web
  |title=MPEC MPEC 2016-T104 : 2014 UZ224
  |publisher=IAU Minor Planet Center
  |date=2016-10-11
  |url=http://www.minorplanetcenter.net/mpec/K16/K16TA4.html
  |accessdate=2016-10-11
  |archive-date=2017-08-06
  |archive-url=https://web.archive.org/web/20170806032333/http://www.minorplanetcenter.net/mpec/K16/K16TA4.html
  |dead-url=no
  }} (K14UM4Z)</ref>
}}

[[Category:2014年发现的天体|20140819]]
[[Category:矮行星候选者]]
[[Category:黃道離散天體]]