2003 UZ413

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2003 UZ413
Discovered by M. E. Brown
D. L. Rabinowitz
C. A. Trujillo
Discovery date October 21, 2003
MPC designation 2003 UZ413
Orbital characteristics[4]
Epoch December 9, 2014
Aphelion 47.905 AU (Q)
Perihelion 30.572 AU (q)
39.239 AU (a)
Eccentricity 0.22086
245.80 yr
107.04° (M)
Inclination 12.04249°
Physical characteristics
Dimensions 370–820 km[4][5]
636 km[6]
Mean density
2.29–3.00 > ρ >0.72 g/cm3[7]
4.13 ± 0.05 h[8]
Spectral type
V−R=0.46 ± 0.06
R−I=0.37 ± 0.06[9]
4.38 ± 0.05[9]

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.[2] It is likely large enough to be a dwarf planet.

It has been observed 36 times over eleven oppositions, with precovery images back to 1954.[4]

Orbit and rotation[edit]

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.[2]

The object rotates very fast. In fact, with a period of about 4.1 hours, it is the fastest rotator in the Kuiper belt after Haumea.[8] It is also member of the Haumea family, which might be related to its fast rotation.

Physical characteristics[edit]

The size of 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 Marsden, B. G. (2008-07-17). "Distant Minor Planets". Minor Planet Electronic Circulars. Bibcode:2008MPEC....O...05B. MPEC 2008-O05. Retrieved 3 December 2010. 
  3. ^ Marc W. Buie (2007-10-22). "Orbit Fit and Astrometric record for 03UZ413". SwRI (Space Science Department). Retrieved 2008-07-23. 
  4. ^ a b c d "JPL Small-Body Database Browser: (2003 UZ413)" (last observation: 2007-10-22). 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". Astronomy and Astrophysics 508 (1): 457–465. doi:10.1051/0004-6361/200912582.  edit
  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]