View source for Astronomy:(472271) 2014 UM33

{{DISPLAYTITLE:{{mp|(472271) 2014 UM|33}}}}
{{Infobox planet
 | minorplanet     = yes
 | name            = {{mp|(472271) 2014 UM|33}}
 | background      = #C2E0FF
 | image           = 
 | caption         = 
 | discovery_ref   = <ref name="MPC-object" />
 | discovered      = 22 October 2014
 | discoverer      = [[Astronomy:Mount Lemmon Survey|Mount Lemmon Survey]] ([[Astronomy:Pan-STARRS|Pan-STARRS]])
 | discovery_site  = Mount Lemmon
 | earliest_precovery_date = 16 October 2003
 | mpc_name         = (472271) {{mp|2014 UM|33}}
 | alt_names       = {{mp|2014 UM|33}}{{·}}{{mp|2010 TQ|182}}
 | pronounced      = 
 | named_after     = 
 | mp_category     = [[Astronomy:Trans-Neptunian object|TNO]]
 | orbit_ref       = <ref name="jpldata" />
 | epoch           = 31 July 2016 ([[Astronomy:Julian day|JD]] 2457600.5)
 | uncertainty     = 3
 | observation_arc = {{nowrap|20.00 yr (>8,000 days)}}
 | aphelion        = 49.631 [[Astronomy:Astronomical unit|AU]]
 | perihelion      = 36.163 AU
 | semimajor       = 42.897 AU
 | eccentricity    = 0.1570
 | period          = 280.96 [[Astronomy:Julian year|yr]] (102,622 days)
 | mean_anomaly    = 269.23[[Degree (angle)|°]]
 | mean_motion     = {{Deg2DMS|0.0035|sup=ms}} / day
 | inclination     = 17.403°
 | asc_node        = 236.58°
 | arg_peri        = 269.24°
 | dimensions      = 320–720 km<ref name="Hjpl" /><br />478 km<ref name="mikebrown" /><br />607&nbsp;km<ref name="johnstonsarchive" /><br />220–880<ref name="absmagcalc" />
 | rotation        = 
 | albedo          = 
 | spectral_type   = 
 | magnitude       = 21–22
 | abs_magnitude   = 4.9<ref name="jpldata" /><br />4.95<ref name="MPC-object" /><br />5.2<ref name="mikebrown" />
}}

'''{{mp|(472271) 2014 UM|33}}''' (provisional designation '''{{mp|2014 UM|33}}''') is a [[Astronomy:Trans-Neptunian object|trans-Neptunian object]] residing in the outer [[Astronomy:Kuiper belt|Kuiper belt]]. It was discovered on October 22, 2014, by the [[Astronomy:Mount Lemmon Survey|Mount Lemmon Survey]].

It is approximately the size of [[Astronomy:2 Pallas|2 Pallas]] in the asteroid belt. On August 18, 2015, {{mp|2014 UM|33}} was found to have been discovered over four years previously, with the designation {{mp|2010 TQ|182}}. This extended its observation arc to over 4 years, and then [[Astronomy:Precovery|precovery]] observations were found using the [[Astronomy:Sloan Digital Sky Survey|Sloan Digital Sky Survey]] from January 2009 and [[Organization:Palomar Observatory|Palomar Observatory]] from October 2003.

==See also==
*[[Astronomy:List of trans-Neptunian objects|List of trans-Neptunian objects]]

== References ==
{{reflist
|refs=

<ref name="MPC-object">{{cite web
  |title      = 472271 (2014 UM33)
  |work       = Minor Planet Center
  |url        = https://www.minorplanetcenter.net/db_search/show_object?object_id=472271
  |access-date = 7 June 2023}}</ref>

<ref name="jpldata">{{cite web
  |type       = 2015-08-26 last obs.
  |title      = JPL Small-Body Database Browser: 472271 (2014 UM33)
  |url        = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2472271
  |publisher  = [[Organization:Jet Propulsion Laboratory|Jet Propulsion Laboratory]]
  |access-date = 25 October 2016}}</ref>

<ref name="johnstonsarchive">{{cite web
  |date       = 24 March 2015
  |title      = List of Known Trans-Neptunian Objects
  |publisher  = Johnston's Archive
  |author     = Wm. Robert Johnston
  |url        = http://www.johnstonsarchive.net/astro/tnoslist.html
  |access-date = 21 July 2015}}</ref>

<ref name="absmagcalc">{{cite web
 |last1=Bruton 
 |first1=Dan 
 |title=Conversion of Absolute Magnitude to Diameter 
 |url=http://www.physics.sfasu.edu/astro/asteroids/sizemagnitude.html 
 |publisher=SFASU – Department of Physics and Astronomy 
 |access-date=18 August 2015 
 |url-status=dead 
 |archive-url=https://web.archive.org/web/20081218204045/http://www.physics.sfasu.edu/astro/asteroids/sizemagnitude.html 
 |archive-date=18 December 2008 
 }}</ref>

<ref name="Hjpl">{{cite web
  |title      = Glossary: Absolute Magnitude (H)
  |url        = http://neo.jpl.nasa.gov/glossary/h.html
  |archive-url = https://web.archive.org/web/20010302182040/http://neo.jpl.nasa.gov/glossary/h.html
  |url-status = dead
  |archive-date = 2 March 2001
  |website    = JPL
  |publisher  = [[Organization:NASA|NASA]]
  |access-date = 2 January 2015}}</ref>

<ref name="mikebrown">{{cite web
  |last1      = Brown
  |first1     = Mike
  |title      = How many dwarf planets are there in the outer solar system? (updates daily)
  |url        = http://web.gps.caltech.edu/~mbrown/dps.html
  |website    = www.gps.caltech.edu
  |publisher  = Caltech
  |access-date = 21 July 2015}}</ref>

}} <!-- end of refs -->

== External links ==
* {{JPL small body|id=2472271}}

{{Dwarf planets}}
{{Small Solar System bodies}}

{{DEFAULTSORT:472271}}
[[Category:Classical Kuiper belt objects]]
[[Category:Possible dwarf planets]]



{{Sourceattribution|(472271) 2014 UM33}}