(202421) 2005 UQ513

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(202421) 2005 UQ513
Discovered by M. E. Brown
D. L. Rabinowitz
C. A. Trujillo
Discovery date October 21, 2005[1]
MPC designation (202421) 2005 UQ513
Minor planet category Cubewano (MPC)[3]
ScatExt (DES)[4]
Orbital characteristics[1][5]
Epoch March 14, 2012 (JD 2456000.5)
Aphelion 49.769 AU (Q)
Perihelion 37.321 AU (q)
43.545 AU (a)
Eccentricity 0.14293
287.35 yr (104,955 d)
221.02° (M)
Inclination 25.7201°
Physical characteristics
Dimensions 498+63
7.03 hr?[1]

(202421) 2005 UQ513, also written as 2005 UQ513, is a cubewano with an absolute magnitude of 3.4.[1] Mike Brown's website lists it as a highly likely dwarf planet.[8] 2005 UQ513 shows signs of weak water ice.[9] Like Quaoar,[10] it has a very[10] red spectrum,[11][12] which indicates that its surface probably contains a lot of complex, processed organic molecules.[11] Its light curve shows variations of Δm=0.3 mag, but no period has been determined.[12]


2005 UQ513 has a perihelion of 37.3 AU.[1] The Minor Planet Center (MPC) classifies it as a cubewano[3] while the Deep Ecliptic Survey (DES) classifies it as ScatExt (scattered-extended).[4] Although dynamically it would have been a good candidate to be a member of the Haumea collisional family, given its red spectrum it is not.[11][12]


It is currently 48.8 AU from the Sun.[7] It will come to perihelion around 2123.[1]

It has been observed 194 times over 14 oppositions with precovery images back to 1990.[1]


  1. ^ a b c d e f g h "JPL Small-Body Database Browser: (2005 UQ513)". 2011-12-26 last obs., 12 opp. Retrieved 2012-05-05. 
  2. ^ "MPEC 2007-R02 : 2003 UY413, 2003 UZ413, 2004 NT33, 2005 CA79, 2005 CB79, 2005 UQ513". IAU Minor Planet Center. 2007-09-01. Retrieved 2009-08-26. 
  3. ^ a b "MPEC 2010-S44 : DISTANT MINOR PLANETS (2010 OCT. 11.0 TT)". IAU Minor Planet Center. 2010-09-25. Retrieved 2011-01-26. 
  4. ^ a b Marc W. Buie (2012/05/06 using 59 observations). "Orbit Fit and Astrometric record for 202421". SwRI (Space Science Department). Retrieved 2012-05-05. 
  5. ^ "AstDyS (202421) 2005UQ513 Orbital information". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-05-05. 
  6. ^ TNOs are Cool: A survey of the trans-Neptunian region. X. Analysis of classical Kuiper belt objects from Herschel* and Spitzer observations p. 18
  7. ^ a b "AstDyS (202421) 2005UQ513 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-05-05. 
  8. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2013-11-30. 
  9. ^ Ragozzine, D. & Brown, M. E. (2007). "Candidate Members and Age Estimate of the Family of Kuiper Belt Object 2003 EL61". The Astronomical Journal 134 (6): 2160–2167. arXiv:0709.0328. Bibcode:2007AJ....134.2160R. doi:10.1086/522334. Retrieved 2009-12-05. 
  10. ^ a b Trujillo, C. A., Sheppard, S. S., & Schaller E. L. (2011). A Photometric System for Detection of Water and Methane Ices on Kuiper Belt Objects
  11. ^ a b c Pinilla-Alonso, N., Licandro, J., & Lorenzi, V. (2008). Visible spectroscopy in the neighborhood of 2003 EL61 (Haumea)
  12. ^ a b c Snodgrass, C., Carry, B., Dumas, C., & Hainaut, O. (2009). Characterisation of candidate members of (136108) Haumea’s family

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