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(455502) 2003 UZ413
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Large plutino
2003 UZ 117
yes #C2E0FF (455502) 2003 UZ 413 455502-2003uz413.jpg Hubble Space Telescope image of 2003 UZ 413 taken in 2008 M. E. BrownD. L. RabinowitzC. A. Trujillo 21 October 2003 63.25 years (23103 days) 29 July 1954 (455502) 2003 UZ 413 TNOplutinoPlutino Buie page actually says that the TNO is in a 3:2 resonance with Neptune. These objects are commonly referred to as "Plutino" (barycentric)barycentric These orbital elements are expressed in terms of the Solar System Barycenter (SSB) as the frame of reference. Due to planetary perturbations, the Sun revolves around the SSB at non-negligible distances, so heliocentric-frame orbital elements and distances (such as those given in JPL's Small-Body Database) can vary on short timescales. 27 April 2019 (JD 2458600.5) 47.976 AU Tm on on 30.246 AU Tm on 39.111 AU Tm on 0.22666 244.60 yr (89,340.7 d) 12.04938° 135.922° 113.43° 145.06° 0 650 1 175 km (upper limit)472 122 25 km (lower limit) 2.29–3.00 > [2003 UZ 413's density] >0.72 g/cm32.64 g/cm3assuming HE and thus a dwarf planet 4.13 0.05 h4.13 h 0.151 0.025 0.064 (upper limit) 0.075 0.076 0.006 (lower limit) Prominent water (H 2 O/"bowl" type)4V–R=0.45 0.04BB taxon (blue/neutral)equivalent to V-I0.75 0.06, B-V0.68 0.06 and V-R0.39 0.05V−R=0.46 0.06R−I=0.37 0.06 21 4.38 0.054.26 (assumed) 0.0040306 ms / day 2
(455502) 2003 UZ 413 is a trans-Neptunian object (TNO) with an absolute magnitude of 4.38. It is in a 2:3 orbital resonance with Neptune, making it a plutino.
History
Discovery
thumb|left|The Samuel Oschin telescope, the telescope that discovered 2003 UZ 413.
2003 UZ 413 was discovered on 21 October 2003, by astronomers Michael E. Brown, Chad Trujillo, and David L. Rabinowitz. The discovery took place at the Palomar Observatory in San Diego, California. The team found the moving object using images taken by a wide-field camera mounted on the 1.2-meter Samuel Oschin Telescope.
It was given the minor planet number 455502 on 22 February 2016.
Further observations
2025 12 26, its orbit has been secured by 513 observations across 29 oppositions, with precovery images as far back as 27 July 1954.
Orbit and classification
2003 UZ 413 orbits the Sun at a distance of 30.2–48.0 astronomical units (AU) with a semi-major axis or average orbital distance of 39.1 AU once every 244 yearsbarycentric (for reference, Neptune's orbit is at 30.1 AU). Its orbit has a relatively high eccentricity of 0.23 and an inclination of 12.05° with respect to the ecliptic.barycentric
2003 UZ 413 is classified as a plutino.Plutino 2003 UZ 413 is in a 2:3 resonance with Neptune, which means that when it makes two revolutions around the Sun, Neptune makes exactly three.
Physical characteristics
Size and albedo
September 2026
The mean diameter of 2003 UZ 413 is estimated to be 650 1 175 km, assuming a low albedo of 0.075 0.076 0.006.
Rotation, shape and density
The object rotates very fast, with a period of about 4.13 hours. It was recognized as the fastest rotator known in the Kuiper belt after Haumea in 2009.
Given its rapid rotation, if it is in hydrostatic equilibrium (and thus a dwarf planet) it must have a density higher than 0.72 g/cm3. Stable Jacobi ellipsoids with an axis ratio of a/b ≥ 1.13 0.03, as implied by its light-curve amplitude of Δm 0.13 0.03, exist for densities in the range of 2.29−3.00 g/cm3. Johnston's Archive reports 2.64 g/cm3, in the center of that range. This would make it an outlier among similarly sized TNOs, which usually have significantly lower densities, and are thought to rarely be dwarf planets.W.M. Grundy K.S. Noll M.W. Buie S.D. Benecchi D. Ragozzine H.G. Roe The Mutual Orbit, Mass, and Density of Transneptunian Binary Gǃkúnǁʼhòmdímà ((229762) 2007 UK 126) Icarus http://www2.lowell.edu/~grundy/abstracts/2019.G-G.html 334 December 2019 30–38 10.1016/j.icarus.2018.12.037 2019Icar..334...30G 126574999 2019-11-06 https://web.archive.org/web/20190407045334/http://www2.lowell.edu/~grundy/abstracts/2019.G-G.html 2019-04-07 dead subscription
Composition and spectrum
thumb|Near-infrared spectra of three water ice-rich plutinos observed by JWST, including 2003 UZ 413 in the middle. Water and carbon dioxide ices are present in all three objects.
In visible light, this object is neutral or slightly red in color and has a flat, featureless reflectance spectrum. 2003 UZ 413 has a water ice-rich composition, similar to plutinos such as 2004 EW 95 and 2002 XV 93.4 These TNOs are often classified as "prominent water"-type or "Bowl"-type TNOs. Their near-infrared spectra have a bowl-shaped water ice absorption band at around 3.0 um wavelength.4
Notes
References
30em Perna D.
Barucci, M.A. Fornasier, S.
2010
Colors and taxonomy of centaurs and trans-Neptunian objects
Astronomy and Astrophysics
510 A53
0912.2621
2010A&A...510A..53P
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etal
last observation: 2017-10-29
JPL Small-Body Database Browser: (2003 UZ413)
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003UZ413
19 August 2019
Brown, M.
Trujillo, C.
Rabinowitz, D.
Marsden, B. G.
2007-09-01
2003 UY413, 2003 UZ413, 2004 NT33, 2005 CA79, 2005 CB79, 2005 UQ513
Minor Planet Electronic Circulars
2007-R02
2007MPEC....R...02B
MPEC 2007-R02
02
Marsden, B. G.
2008-07-17
Distant Minor Planets
Minor Planet Electronic Circulars
https://www.minorplanetcenter.net/mpec/K08/K08O05.html
MPEC 2008-O05
3 December 2010
2003 UZ413 Ephemerides
Asteroids Dynamic Site
https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=455502
2019-08-19
https://web.archive.org/web/20190819164700/https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=455502
2019-08-19
Marc W. Buie
Marc W. Buie
2015-09-24
Orbit Fit and Astrometric record for 2003 UZ413
SwRI (Space Science Department)
http://www.boulder.swri.edu/~buie/kbo/astrom/03UZ413.html
https://web.archive.org/web/20150923194114/http://www.boulder.swri.edu/~buie/kbo/astrom/03UZ413.html
dead
2015-09-23
2019-08-19
List of known trans-Neptunian objects
Johnston's Archive
William Robert Johnston
https://www.johnstonsarchive.net/astro/tnoslist.html
2019-08-19
Perna D.
Dotto E.
Barucci M. A.
Rossi A.
Fornasier S.
de Bergh C.
http://www.aanda.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/aa/abs/2009/46/aa11970-09/aa11970-09.html
Rotations and densities of trans-Neptunian objects
Astronomy & Astrophysics
508 1 451–455
10.1051/0004-6361/200911970 free
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1 June 2019 subscription
Fornasier, et al. 2009
Fornasier S.
Barucci M. A.
de Bergh C.
Alvarez-Candal A.
Demeo F.
Merlin F.
Perna D.
Guilbert A.
Delsanti A.
E. Dotto
A. Doressoundiram
Visible spectroscopy of the new ESO large programme on trans-Neptunian objects and centaurs: Final results
10.1051/0004-6361/200912582 free
Astronomy and Astrophysics
508 1 457–465
2009
http://www.aanda.org/articles/aa/pdf/2009/46/aa12582-09.pdf
0910.0450
2009A&A...508..457F
"TNOs are Cool": A survey of the trans-Neptunian region
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A. Farkas-Takács
Cs. Kiss
E. Vilenius
G. Marton
T. G. Müller
M. Mommert
Astronomy & Astrophysics
2002.12712
28 February 2020 638
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(455502) 2003 UZ413 Precovery Images
https://andrew-lowe.ca/2003uz413.htm
Andrew Lowe's Minor Planet
28 April 2019
etal
A. C. Souza-Feliciano
B. J. Holler
N. Pinilla-Alonso
M. De Prá
R. Brunetto
T. Müller
Spectroscopy of the binary TNO Mors-Somnus with the JWST and its relationship to the cold classical and plutino subpopulations observed in the DiSCo-TNO project
Astronomy & Astrophysics
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681
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Noemí Pinilla-Alonso
Rosario Brunetto
Mário N. De Prá
Bryan J. Holler
Elsa Hénault
Ana Carolina de Souza Feliciano
A JWST/DiSCo-TNOs portrait of the primordial Solar System through its trans-Neptunian objects
https://hal.science/hal-04961629v1/file/s41550-024-02433-2.pdf
Nature Astronomy
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2025NatAs...9..230P
274932942
Donald K. Yeomans https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%278%27&TABLE_TYPE=%27ELEMENTS%27&START_TIME=%272000-01-01%27&STOP_TIME=%272000-01-02%27&STEP_SIZE=%27200%20years%27&CENTER=%27@0%27&OUT_UNITS=%27AU-D%27 HORIZONS Web-Interface for Neptune Barycenter (Major Body=8) JPL Horizons On-Line Ephemeris System 18 July 2014 7 September 2021 https://web.archive.org/web/20210907055935/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%278%27&TABLE_TYPE=%27ELEMENTS%27&START_TIME=%272000-01-01%27&STOP_TIME=%272000-01-02%27&STEP_SIZE=%27200%20years%27&CENTER=%27%400%27&OUT_UNITS=%27AU-D%27 live —Select "Ephemeris Type: Orbital Elements", "Time Span: 2000-01-01 12:00 to 2000-01-02". ("Target Body: Neptune Barycenter" and "Center: Solar System Barycenter (@0)".)
JPL/HORIZONS 455502 (2003 UZ413) (Barycentric)
https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27455502%27&TABLE_TYPE=%27ELEMENTS%27&START_TIME=%27JD2461000.5%27&STOP_TIME=%27JD2461001.5%27&STEP_SIZE=%271y%27&CENTER=%27@0%27&OUT_UNITS=%27AU-D%27
JPL Horizons On-Line Ephemeris System
Jet Propulsion Laboratory
2026-09-18 Solution using the Solar System Barycenter. Ephemeris Type: Elements and Center: @0)
JPL/HORIZONS 455502 (2003 UZ413) (Heliocentric)
https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND='455502'&TABLE_TYPE='ELEMENTS'&START_TIME='JD2460800.5'&STOP_TIME='JD2461000.5'&STEP_SIZE='200d'&CENTER='500@10'&OUT_UNITS='AU-D'
JPL Horizons On-Line Ephemeris System
Jet Propulsion Laboratory
2026-09-18 Solution using the Sun. Ephemeris Type: Elements and Center: @sun)
Minor Planet Center, (455502) = 2003 UZ413
External links
2003 UZ413 Precovery Images
455502
455502 (455502) 2003 UZ 413
Category:Plutinos
Category:Discoveries by the Palomar Observatory
20031021