229762 Gǃkúnǁʼhòmdímà
| 2007 UK126 photographed by the UK Schmidt Telescope (Precovery, 1997)). (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 | |
| (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) |
| TJupiter | 6.088 |
| Physical characteristics | |
| Dimensions | 648+60 −46[7] 599±77 km[6] 612 km[8] |
Mean density | <1.74 g/cm3[7] |
| 11.05 h (0.460 d) | |
| 0.167+0.058 −0.038[6] | |
| 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[update], Mike Brown lists it as highly likely a dwarf planet.[9] Its light-curve amplitude is estimated to be Δm=0.111 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
- ^ a b "2007 UK126". Minor Planet Electronic Circ., 2008-D38 (2008). Bibcode:2008MPEC....D...38S. Retrieved 2008-07-11.
{{cite journal}}: Cite journal requires|journal=(help) - ^ Marc W. Buie (2012-05-08). "Orbit Fit and Astrometric record for 229762". SwRI (Space Science Department). Retrieved 2012-05-07.
- ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2012-05-07.
- ^ a b c d "JPL Small-Body Database Browser: 229762 (2007 UK126)" (2013-12-01 last obs and observation arc=31 years). Retrieved 7 April 2016.
- ^ a b (229762) 2007 UK126, Johnston's Archive. Last updated 20 September 2011
- ^ a b c d e f 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. arXiv:1202.1481. Bibcode:2012A&A...541A..92S. doi:10.1051/0004-6361/201118541.
- ^ a b Results from the 2014 November 15th multi-chord stellar occultation by the TNO (229762) 2007 UK126, 2016.
- ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)" Archived October 18, 2011, at the Wayback Machine
- ^ 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.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ 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
- 229762 Gǃkúnǁʼhòmdímà at the JPL Small-Body Database
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