(229762) 2007 Uk126

(229762) 2007 UK126
Discovered by M. E. Schwamb
M. E. Brown
D. L. Rabinowitz
Discovery date October 19, 2007
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)
Semi-major axis 74.3839 AU (a)
Eccentricity 0.4942
Orbital period 640.55 a (234,324.7 d)
Mean anomaly 341.36848° (M)
Inclination 23.34941°
Longitude of ascending node 131.22344°
Argument of perihelion 345.79987°
Satellites 1[4][5]
Physical characteristics
Dimensions 599 ± 77 km[5]
Albedo 0.167+0.058
Apparent magnitude 20.8[1]
Absolute magnitude (H) 3.69 ± 0.10[5]

(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.[7] Its light-curve amplitude is estimated to be Δm=0.111 mag.[8]

Its orbital eccentricity of 0.49 suggests that it was gravitationally scattered onto its eccentric orbit. It is estimated to come to perihelion in December 2045.[6]

It has been observed 58 times over 9 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

  • Palomar Distant Solar System Survey (PDSSS)


External links

  • Horizons Ephemeris
  • 2007 UK126 Precovery Images
  • 3rd largest scattered disk object discovered (Yahoo Groups)
  • 2007 UK126 Minor planet designation number
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