(303775) 2005 QU182

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(303775) 2005 QU182
Discovered by M. E. Brown
D. L. Rabinowitz
C. A. Trujillo
Discovery date August 30, 2005
MPC designation 2005 QU182
Minor planet category TNO (SDO)[2][3]
Orbital characteristics[4]
Epoch February 8, 2011
Aphelion 190.75 AU (Q)
Perihelion 37.01 AU (q)
Semi-major axis 113.88 AU (a)
Eccentricity 0.675
Orbital period 1215.26 yr
Mean anomaly 11.65° (M)
Inclination 14.02°
Longitude of ascending node 78.45°
Argument of perihelion 224.46°
Physical characteristics
Dimensions 416±73 km[5]
Sidereal rotation period 9.61 hr[4]
Albedo 0.328+0.160
Apparent magnitude 20.9[6]
Absolute magnitude (H) 3.5[4]

(303775) 2005 QU182, also written as (303775) 2005 QU182, is a trans-Neptunian object with a bright absolute magnitude of 3.5.[4] Mike Brown lists it as probably a dwarf planet.[7]


It came to perihelion in 1971,[4] and is currently 50.5 AU from the Sun.[6] In April 2013 it moved beyond 50 AU from the Sun.

It has been observed 81 times over 10 oppositions with precovery images back to 1974.[4]

2005 QU182 takes over 1,200 years to orbit the Sun. Of the known and likely dwarf planets, only Sedna, 2012 VP113, and 2010 VZ98 have a longer orbit around the Sun.[8]


  1. ^ "MPEC 2007-R03 : 2004 PF115, 2004 PG115, 2004 XA192, 2005 QU182". IAU Minor Planet Center. 2007-09-01. Retrieved 2009-08-26. 
  2. ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2009-01-22. 
  3. ^ Marc W. Buie (2008-10-24). "Orbit Fit and Astrometric record for 05QU182". SwRI (Space Science Department). Retrieved 2008-12-09. 
  4. ^ a b c d e f "JPL Small-Body Database Browser: (2005 QU182)". 2009-09-18 last obs. Retrieved 2010-01-02. 
  5. ^ a b Santos-Sanz, P.; Lellouch, E.; Fornasier, S.; Kiss, C.; Pal, A.; Müller, T. G.; Vilenius, E.; Stansberry, J.; Mommert, M.; Delsanti, A.; Mueller, M.; Peixinho, N.; Henry, F.; Ortiz, J. L.; Thirouin, A.; Protopapa, S.; Duffard, R.; Szalai, N.; Lim, T.; Ejeta, C.; Hartogh, P.; Harris, A. W.; Rengel, M. (2012). ""TNOs are Cool": A survey of the trans-Neptunian region". Astronomy & Astrophysics 541: A92. doi:10.1051/0004-6361/201118541.  edit
  6. ^ a b "AstDys 2005QU182 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-05-16. Retrieved 2009-03-16. 
  7. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2014-03-28. 
  8. ^ [1]

External links[edit]