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(472271) 2014 UM₃₃
Discovery
Discovered by	Mount Lemmon Survey (Pan-STARRS)
Discovery site	Mount Lemmon
Discovery date	22 October 2014
Designations
MPC designation	(472271) 2014 UM₃₃
Alternative designations	2014 UM₃₃ · 2010 TQ₁₈₂
Minor planet category	TNO
Orbital characteristics
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 3
Observation arc	20.00 yr (>8,000 days)
Earliest precovery date	16 October 2003
Aphelion	49.631 AU
Perihelion	36.163 AU
Semi-major axis	42.897 AU
Eccentricity	0.1570
Orbital period (sidereal)	280.96 yr (102,622 days)
Mean anomaly	269.23°
Mean motion	0° 0 12.6 / day
Inclination	17.403°
Longitude of ascending node	236.58°
Argument of perihelion	269.24°
Physical characteristics
Dimensions	320–720 km 478 km 607 km 220–880
Apparent magnitude	21–22
Absolute magnitude (H)	4.9 4.95 5.2

(472271) 2014 UM₃₃ (provisional designation 2014 UM₃₃) is a trans-Neptunian object residing in the outer Kuiper belt. It was discovered on October 22, 2014, by the Mount Lemmon Survey.

It is approximately the size of 2 Pallas in the asteroid belt. On August 18, 2015, 2014 UM₃₃ was found to have been discovered over four years previously, with the designation 2010 TQ₁₈₂. This extended its observation arc to over 4 years, and then precovery observations were found using the Sloan Digital Sky Survey from January 2009 and Palomar Observatory from October 2003.

References

^ "472271 (2014 UM33)". Minor Planet Center. Retrieved 7 June 2023.
^ "JPL Small-Body Database Browser: 472271 (2014 UM33)" (2015-08-26 last obs.). Jet Propulsion Laboratory. Retrieved 25 October 2016.
"Glossary: Absolute Magnitude (H)". JPL. NASA. Archived from the original on 2 March 2001. Retrieved 2 January 2015.
^ Brown, Mike. "How many dwarf planets are there in the outer solar system? (updates daily)". www.gps.caltech.edu. Caltech. Retrieved 21 July 2015.
Wm. Robert Johnston (24 March 2015). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 21 July 2015.
Bruton, Dan. "Conversion of Absolute Magnitude to Diameter". SFASU – Department of Physics and Astronomy. Archived from the original on 18 December 2008. Retrieved 18 August 2015.

External links

(472271) 2014 UM33 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

Dwarf planets

List of possible dwarf planets
Former dwarf planets
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Sedna

Candidate

Asteroids	Hygiea Interamnia
Centaurs	Chariklo Chiron Pholus 1999 OX₃ 2013 TC₁₄₆ 2014 NW₆₅
Plutinos	Huya Ixion 2001 QF₂₉₈ 2002 VR₁₂₈ 2002 XV₉₃ 2003 AZ₈₄ 2003 UZ₄₁₃ 2003 VS₂ 2007 JH₄₃ 2017 OF69
Twotinos	2002 WC₁₉
Cubewanos	Chaos Salacia Varda Varuna 1998 SN₁₆₅ 2002 AW₁₉₇ 2002 CY248 2002 KX₁₄ 2002 MS₄ 2002 UX₂₅ 2003 QW₉₀ 2004 GV₉ 2004 NT₃₃ 2004 PF₁₁₅ 2004 TY₃₆₄ 2004 UX₁₀ 2005 RN₄₃ 2005 UQ₅₁₃ 2010 FX86
Other KBOs	1999 CD₁₅₈ 1999 DE₉ 2000 YW₁₃₄ 2002 XW₉₃ 2010 JO₁₇₉ 2010 VK₂₀₁ 2011 FW62 2011 GM₂₇ 2013 FZ₂₇ 2014 UM₃₃ 2015 AM₂₈₁ 2015 RR₂₄₅
Scattered disc objects	Gǃkúnǁʼhòmdímà Dziewanna 1996 GQ₂₁ 1996 TL₆₆ 2001 UR₁₆₃ 2002 TC₃₀₂ 2004 XA₁₉₂ 2005 QU₁₈₂ 2005 RM₄₃ 2006 QH181 2008 OG₁₉ 2010 KZ39 2010 RE₆₄ 2010 RF₄₃ 2010 JO179 2010 TJ 2010 VZ₉₈ 2013 FY₂₇ 2014 AN₅₅ 2014 EZ₅₁ 2014 UZ224 2014 WK₅₀₉ 2015 KH162 2015 RR245 2017 FO161 2018 AG37 2018 VG18 2021 DR15 2021 LL37
Detached objects	2003 FY₁₂₈ 2003 QX₁₁₃ 2004 XR₁₉₀ 2005 TB₁₉₀ 2007 JJ₄₃ 2008 ST₂₉₁
Sednoids	2012 VP113

Category

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(472270) 2014 UJ1 (472271) 2014 UM33 (472272) 2014 UY34

Small Solar System bodies

Minor planets

Designation Groups List Moon Meanings of names
Asteroid	Active Aten asteroid Asteroid belt Family Jupiter trojan Near-Earth Spectral types
Distant minor planet	Centaur Neptune trojan Damocloid Trans-Neptunian object Detached Kuiper belt Oort cloud Scattered disc

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