astro.wikisort.org - Asteroid

2014 UZ₂₂₄ is a trans-Neptunian object and possible dwarf planet orbiting in the scattered disc of the outermost Solar System. As of 2021^[update], it is approximately 89.7 AU (13.42 billion km) from the Sun, and will slowly decrease in distance until it reaches its perihelion of 38 AU in 2142. The discoverers have nicknamed it "DeeDee" for "Distant Dwarf".[7][8]

2014 UZ₂₂₄

2014 UZ224 imaged by ALMA
Discovery[1]
Discovered by	David Gerdes et al.
Discovery site	Cerro Tololo Obs.
Discovery date	19 August 2014
Designations
MPC designation	2014 UZ224
Alternative designations	DeeDee (nickname)
Minor planet category	TNO[2] · SDO[3] p-DP[4]
Orbital characteristics[2]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 5
Observation arc	12.08 yr (4,414 days)
Earliest precovery date	15 October 2006[5]
Aphelion	176.988±0.453 AU
Perihelion	38.295±0.029 AU
Semi-major axis	107.642±0.275 AU
Eccentricity	0.64423
Orbital period (sidereal)	1116.81±4.28 yr (407,913 days)
Mean anomaly	320.482±0.210°
Mean motion	0° 0m 3.177s / day
Inclination	26.790°
Longitude of ascending node	130.699±0.004°
Time of perihelion	≈ 27 May 2142[6] ±67 days
Argument of perihelion	29.989±0.063°
Physical characteristics
Mean diameter	635+65 −72 km[3]
Geometric albedo	0.131+0.038 −0.028[3]
Spectral type	G–R = 0.77±0.11[3]
Apparent magnitude	23.38±0.05[3]
Absolute magnitude (H)	3.5[3] · 3.4[2]

2014 UZ₂₂₄ was discovered by a team led by David Gerdes using data collected by the large camera Dark Energy Camera (DECam).[9][10] It has a diameter of ~635 km (395 mi) and reflects just 13 percent of the sunlight that hits it on its approximately 1,100 year orbit around the Sun.[3][2] Since the numbering of (532037) 2013 FY27 in May 2019, 2014 UZ₂₂₄ may be the largest unnumbered object in the Solar System (though see 2012 VP113).[4] The earliest known precovery observations of 2014 UZ₂₂₄ were taken at the Mauna Kea Observatory on 15 October 2006.[5]

See also

• List of Solar System objects most distant from the Sun
• List of Solar System objects by greatest aphelion

References

External links

• 2014 UZ224 ("DeeDee") Fact Sheet
• 2014 UZ224 at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2014 UZ224 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[ru] 2014 UZ224

2014 UZ224 — крупный транснептуновый объект в поясе Койпера, кандидат в карликовые планеты. Открыт группой астрономов в рамках проекта Pan-STARRS на снимках, полученных 19 августа 2014 года посредством камеры DECam телескопа имени Виктора Бланко в обсерватории Серро-Тололо в Чили[2][3]. Получил неформальное название DeeDee (сокращение от Distant Dwarf). Свет от DeeDee доходит до Земли за 13 часов. Объявление об открытии было опубликовано 11 октября 2016 года[4].

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