(229762) 2007 UK126

(229762) 2007 UK126

(229762) 2007 UK126 photographed by the UK Schmidt Telescope.
Discovery[1]
Discovered by M. E. Schwamb
M. E. Brown
D. L. Rabinowitz
Discovery date 19 October 2007
Designations
MPC designation (229762) 2007 UK126
Scat-ext[2][3]
Orbital characteristics[4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc 12117 days (33.17 yr)
Aphelion 109.7388 AU (16.41669 Tm) (Q)
Perihelion 37.4839 AU (5.60751 Tm) (q)
73.6114 AU (11.01211 Tm) (a)
Eccentricity 0.49079 (e)
631.58 yr (230683 d)
342.70708° (M)
0° 0m 5.618s / day (n)
Inclination 23.34333° (i)
131.26955° (Ω)
346.58117° (ω)
Known satellites 1[5][6]
Earth MOID 36.5042 AU (5.46095 Tm)
Jupiter MOID 32.2457 AU (4.82389 Tm)
Jupiter Tisserand parameter 6.088
Physical characteristics
Dimensions

599–629 km[7]

648+60
−46 km[8]
599±77 km[6]
612 km[9]
Mean density
 <1.74 g/cm3[8]
>8 h, presumably 11.05 h[10]

0.15±0.016[7]

0.167+0.058
−0.038[6]
Temperature 50–55 K max.[7]
20.8[1]
3.69±0.10[6]
3.5[4]

    (229762) 2007 UK126, also written as (229762) 2007 UK126, is a scattered disc object (SDO) with a bright absolute magnitude of 3.7.[6] This makes it probably a dwarf planet. As of August 2011, Mike Brown lists it as highly likely a dwarf planet.[11] Its light-curve amplitude is estimated to be Δm = 0.03 ± 0.01 mag.[10]

    Its orbital eccentricity of 0.49 suggests that it was gravitationally scattered onto its eccentric orbit. It will come to perihelion in February 2046.[4]

    It has been observed 73 times over 11 oppositions with precovery images back to 1982.[4]

    Satellite

    It has been reported that (229762) 2007 UK126 has a satellite, but a mass estimate has not been made.[6] 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.[5]

    See also

    References

    1. 1 2 "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. 1 2 3 4 "JPL Small-Body Database Browser: 229762 (2007 UK126)" (2013-12-01 last obs and observation arc=31 years). Retrieved 7 April 2016.
    5. 1 2 (229762) 2007 UK126, Johnston's Archive. Last updated 20 September 2011
    6. 1 2 3 4 5 6 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. Bibcode:2012A&A...541A..92S. arXiv:1202.1481 Freely accessible. doi:10.1051/0004-6361/201118541.
    7. 1 2 3 Schindler, K.; Wolf, J.; Bardecker, J.; Olsen, A.; Müller, T.; Kiss, C.; Ortiz, J. L.; Braga-Ribas, F.; Camargo, J. I. B. (2017). "Results from a triple chord stellar occultation and far-infrared photometry of the trans-Neptunian object (229762) 2007 UK126". Astronomy & Astrophysics. 600. doi:10.1051/0004-6361/201628620.
    8. 1 2 Results from the 2014 November 15th multi-chord stellar occultation by the TNO (229762) 2007 UK126, 2016.
    9. ↑ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)" Archived October 18, 2011, at the Wayback Machine.
    10. 1 2 Thirouin, A.; Noll, K. S.; Ortiz, J. L.; Morales, N. (2014-09-01). "Rotational properties of the binary and non-binary populations in the trans-Neptunian belt". Astronomy & Astrophysics. 569.
    11. ↑ Michael E. Brown (May 7, 2012). "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Archived from the original on 2011-10-18. Retrieved 2012-05-07.
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