(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.
Discovery[1]
Discovered by M. E. Schwamb
M. E. Brown
D. L. Rabinowitz
Discovery date October 19, 2007
Designations
MPC designation (229762) 2007 UK126
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)
341.36848° (M)
Inclination 23.34941°
131.22344°
345.79987°
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]
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(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

It has been reported that (229762) 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

References

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External links

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  4. 4.0 4.1 (229762) 2007 UK126, Johnston's Archive. Last updated 20 September 2011
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  7. Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)"
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  9. Roland, S., Bruzzone, S., Nowajewski, P., Tancredi, G., Barrera, L., Martinez, M., Troncoso, P., & Vasquez, S. (2009). Lightcurves of Icy “Dwarf Planets” (Plutoids)