(229762) 2007 UK126
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(229762) 2007 UK126
(229762) 2007 UK126 photographed by the UK Schmidt Telescope.
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Discovery[1]
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| Discovered by | M. E. Schwamb M. E. Brown D. L. Rabinowitz |
| Discovery date | October 19, 2007 |
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Designations
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| MPC designation | (229762) 2007 UK126 |
| Minor planet category |
Scat-ext[2][3] |
| Epoch March 14, 2012 (JD 2456000.5) | |
| Aphelion | 110.98 AU (Q) |
| Perihelion | 37.64 AU (q) |
| Semi-major axis | 74.31 AU (a) |
| Eccentricity | 0.4934 |
| Orbital period | 640.58 a (233,972 d) |
| Mean anomaly | 341.04° (M) |
| Inclination | 23.35402° |
| Longitude of ascending node | 131.18940° |
| Argument of perihelion | 345.78° |
| Satellites | 1[5][6] |
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Physical characteristics
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| Dimensions | 599 ± 77 km[6] |
| Albedo | 0.167+0.058 −0.038[6] |
| Apparent magnitude | 20.8[1] |
| Absolute magnitude (H) | 3.69 ± 0.10[6] 3.4[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 qualifies it as one of the largest dwarf-planet candidates. As of August 2011[update], Mike Brown lists it as a highly likely 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.[4]
It has been observed 58 times over 9 oppositions with precovery images back to 1982.[4]
It has been reported that 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 139 km, a semi-major axis of 3600 km, and an orbital period of 3.7 d.[5]
References
- ^ a b "2007 UK126". Minor Planet Electronic Circ., 2008-D38 (2008). http://adsabs.harvard.edu/abs/2008MPEC....D...38S. Retrieved 2008-07-11.
- ^ Marc W. Buie (2012-05-08). "Orbit Fit and Astrometric record for 229762". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/229762.html. Retrieved 2012-05-07.
- ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. http://www.minorplanetcenter.org/iau/lists/Centaurs.html. Retrieved 2012-05-07.
- ^ a b c d "JPL Small-Body Database Browser: 229762 (2007 UK126)". 2009-12-20 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=229762. Retrieved 2012-05-07.
- ^ a b (229762) 2007 UK126, Johnston's Archive. Last updated 20 September 2011
- ^ a b c d e f Müller, T. G.; Lellouch, E.; Böhnhardt, H.; Stansberry, J.; Barucci, A.; Crovisier, J.; Delsanti, A.; Doressoundiram, A. et al. (2009). "TNOs are Cool: A Survey of the Transneptunian Region". Earth, Moon, and Planets 105 (2–4): 209. DOI:10.1007/s11038-009-9307-x.
- ^ Michael E. Brown (May 07 2012). "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. http://www.gps.caltech.edu/~mbrown/dps.html. Retrieved 2012-05-07.
- ^ 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
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 2007 UK126 Precovery Images
- 3rd largest scattered disk object discovered (Yahoo Groups)
- 2007 UK126 Minor planet designation number
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