(229762) 2007 UK126

From Wikipedia, the free encyclopedia
Jump to: navigation, search
(229762) 2007 UK126
2007 UK126 photographed by the UK Schmidt Telescope.
(229762) 2007 UK126 photographed by the UK Schmidt Telescope.
Discovery[1]
Discovered by M. E. Schwamb
M. E. Brown
D. L. Rabinowitz
Discovery date October 19, 2007
Designations
MPC designation (229762) 2007 UK126
Minor planet category Scat-ext[2][3]
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)
341.3684 (M)
Inclination 23.3494
131.2234
345.7998
Known satellites 1[4][5]
Physical characteristics
Dimensions 599±77 km[5]
612 km[7]
Albedo 0.167+0.058
−0.038
[5]
20.8[1]
3.69±0.10[5]
3.43[6]

(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]

Satellite[edit]

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]

References[edit]

  1. ^ a b "2007 UK126". Minor Planet Electronic Circ., 2008-D38 (2008). 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.  edit
  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]