(229762) 2007 Uk126

(229762) 2007 UK126
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)
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
−0.038
[5]
Apparent magnitude 20.8[1]
Absolute magnitude (H) 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.[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)

References

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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