(455502) 2003 UZ413

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2003 UZ413
Discovery [1]
Discovered byM. E. Brown
D. L. Rabinowitz
C. A. Trujillo
Discovery date21 October 2003
MPC designation2003 UZ413
TNO[2] · plutino[3][4]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc22417 days (61.37 yr)
Earliest precovery date29 July 1954
Aphelion47.858 AU (7.1595 Tm) (Q)
Perihelion30.435 AU (4.5530 Tm) (q)
39.146 AU (5.8562 Tm) (a)
Eccentricity0.22255 (e)
244.93 yr (89461.5 d)
109.14° (M)
0° 0m 14.487s / day (n)
Inclination12.04279° (i)
136.158° (Ω)
144.70° (ω)
Physical characteristics
Dimensions370–820 km[2][5]
636 km[6]
Mean density
2.29–3.00 > ρ >0.72 g/cm3[7]
4.13 ± 0.05 h[8]
V−R=0.46 ± 0.06
R−I=0.37 ± 0.06[9]
4.38 ± 0.05,[9] 4.4[2]

(455502) 2003 UZ413, also written as 2003 UZ413, is a trans-Neptunian object (TNO) with an absolute magnitude of 4.4.[9] It has a 2:3 orbital resonance with Neptune, which makes it a plutino.[3] It is likely large enough to be a dwarf planet.

It has been observed 79 times over 15 oppositions, with precovery images back to 1954.[2]

Orbit and rotation[edit]

(455502) 2003 UZ413 is locked in 2:3 resonance with Neptune, which means that when it makes two revolutions around the Sun, Neptune makes exactly three.[3]

The object rotates very fast. In fact, with a period of about 4.1 hours, it is the fastest rotator known in the Kuiper belt after Haumea.[8]

Physical characteristics[edit]

The size of (455502) 2003 UZ413 is not known, but a reasonable estimate is around 600 kilometres (370 mi).[5][6] Given its rapid rotation, it must have a density higher than 0.72 g/cm3.[7] 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.[7]

In visible light, this object is neutral or slightly red in color and has a flat, featureless reflectance spectrum.[8]


  1. ^ 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: 02. Bibcode:2007MPEC....R...02B. MPEC 2007-R02.
  2. ^ a b c d e "JPL Small-Body Database Browser: (2003 UZ413)" (last observation: 2007-10-22). Retrieved 8 April 2016.
  3. ^ a b c Marsden, B. G. (2008-07-17). "Distant Minor Planets". Minor Planet Electronic Circulars. Bibcode:2008MPEC....O...05B. MPEC 2008-O05. Retrieved 3 December 2010.
  4. ^ Marc W. Buie (2007-10-22). "Orbit Fit and Astrometric record for 03UZ413". SwRI (Space Science Department). Archived from the original on 2011-05-20. Retrieved 2008-07-23.
  5. ^ a b "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 1 September 2008. Retrieved 2008-07-23.
  6. ^ a b William Robert Johnston. "List of known trans-Neptunian objects". Johnston's Archive. Retrieved 2012-05-15.
  7. ^ a b c Perna, D., Dotto, E., Barucci, M.A., Rossi, A., Fornasier, S., & de Bergh, C. (2009). Rotations and densities of trans-Neptunian objects.
  8. ^ a b c Fornasier, S.; Barucci, M. A.; de Bergh, C.; Alvarez-Candal, A.; Demeo, F.; Merlin, F.; Perna, D.; Guilbert, A.; Delsanti, A.; Dotto, E.; Doressoundiram, A. (2009). "Visible spectroscopy of the new ESO large programme on trans-Neptunian objects and centaurs: Final results" (PDF). Astronomy and Astrophysics. 508 (1): 457–465. arXiv:0910.0450. Bibcode:2009A&A...508..457F. doi:10.1051/0004-6361/200912582.
  9. ^ a b c Perna, D.; Barucci, M.A.; Fornasier, S.; et al. (2010). "Colors and taxonomy of centaurs and trans-Neptunian objects". Astronomy and Astrophysics. 510: A53. arXiv:0912.2621. Bibcode:2010A&A...510A..53P. doi:10.1051/0004-6361/200913654.
  10. ^ "AstDys 2003UZ413 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-09-04. Retrieved 2009-08-26.

External links[edit]