(229762) 2007 UK126

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(229762) 2007 UK126
2007 UK126 photographed by the UK Schmidt Telescope.
(229762) 2007 UK126 photographed by the UK Schmidt Telescope.
Discovered by M. E. Schwamb
M. E. Brown
D. L. Rabinowitz
Discovery date October 19, 2007
MPC designation (229762) 2007 UK126
Orbital characteristics[6]
Epoch September 30, 2012 (JD 2456200.5)
Aphelion 111.1426 AU (Q)
Perihelion 37.6252 AU (q)
74.3839 AU (a)
Eccentricity 0.4942
640.55 a (234324.7 d)
341.36848° (M)
Inclination 23.34941°
Known satellites 1[4][5]
Physical characteristics
Dimensions 599±77 km[5]
612 km[7]
Albedo 0.167+0.058

(229762) 2007 UK126, also written as (229762) 2007 UK126, is a scattered disc object (SDO) with a bright absolute magnitude of 3.7.[5] This makes it probably a dwarf planet. As of August 2011, Mike Brown lists it as highly likely a dwarf planet.[8] Its light-curve amplitude is estimated to be Δm=0.111 mag.[9]

Its orbital eccentricity of 0.49 suggests that it was gravitationally scattered onto its eccentric orbit. It will come to perihelion in February 2046.[6]

It has been observed 73 times over 11 oppositions with precovery images back to 1982.[6]


It has been reported that 2007 UK126 has a satellite, but a mass estimate has not been made.[5] The magnitude difference between the primary and the satellite is 3.79 mag. The satellite has a tentative diameter of 139 km, a semi-major axis of 3600 km, and an orbital period of 3.7 d.[4]

See also[edit]


  1. ^ a b "2007 UK126". Minor Planet Electronic Circ., 2008-D38 (2008). Bibcode:2008MPEC....D...38S. Retrieved 2008-07-11. 
  2. ^ Marc W. Buie (2012-05-08). "Orbit Fit and Astrometric record for 229762". SwRI (Space Science Department). Retrieved 2012-05-07. 
  3. ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2012-05-07. 
  4. ^ a b (229762) 2007 UK126, Johnston's Archive. Last updated 20 September 2011
  5. ^ a b c d e f 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 IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel-PACS". Astronomy & Astrophysics 541: A92. doi:10.1051/0004-6361/201118541. 
  6. ^ a b c d "JPL Small-Body Database Browser: 229762 (2007 UK126)" (2013-12-01 last obs and observation arc=31 years). Retrieved 2012-08-27. 
  7. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)"
  8. ^ Michael E. Brown (May 7, 2012). "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2012-05-07. 
  9. ^ Roland, S., Bruzzone, S., Nowajewski, P., Tancredi, G., Barrera, L., Martinez, M., Troncoso, P., & Vasquez, S. (2009). Lightcurves of Icy “Dwarf Planets” (Plutoids)

External links[edit]