(455502) 2003 UZ413
 Hubble Space Telescope image of 2003 UZ413 taken in 2008 | |
| Discovery[1] | |
|---|---|
| Discovered by | M. E. Brown D. L. Rabinowitz C. A. Trujillo |
| Discovery date | 21 October 2003 |
| Designations | |
| TNO[2] · plutino[3][4][a] | |
| Orbital characteristics[2] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 63.25 years (23103 days) |
| Earliest precovery date | 29 July 1954 |
| Aphelion | 47.968 AU (7.1759 Tm) |
| Perihelion | 30.241 AU (4.5240 Tm) |
| 39.104 AU (5.8499 Tm) | |
| Eccentricity | 0.22667 |
| 244.54 yr (89317.3 d) | |
| 113.43° | |
| 0° 0m 14.51s / day | |
| Inclination | 12.04911° |
| 135.930° | |
| 145.00° | |
| Known satellites | 0 |
| Physical characteristics | |
| Dimensions | 650+1 −175 km (upper limit)[5] 472+122 −25 km (lower limit)[5] |
Mean density | 2.29–3.00 > ρ >0.72 g/cm3[6] 2.64 g/cm3[7] (if HE and a dwarf planet) |
| 4.13±0.05 h[6][8] 4.14 h[2] | |
| 0.151+0.025 −0.064 (upper limit)[5] 0.075+0.076 −0.006 (lower limit)[5] | |
| Prominent water (H 2O/"bowl" type)[9]: 4 V–R=0.45±0.04[5] BB taxon (blue/neutral)[7][10][b] V−R=0.46±0.06 R−I=0.37±0.06[10] | |
| 21[11] | |
| 4.38±0.05[5] 4.3 (assumed)[2] | |
(455502) 2003 UZ413 is a trans-Neptunian object (TNO) with an absolute magnitude of 4.38.[5] It is in a 2:3 orbital resonance with Neptune, making it a plutino.[3]
History
[edit]Discovery
[edit]
2003 UZ413 was discovered on 21 October 2003, by astronomers Michael E. Brown, Chad Trujillo, and David L. Rabinowitz. The discovery took place at the Palomar Observatory in San Diego, California. The team found the moving object using images taken by a wide-field camera mounted on the 1.2-meter Samuel Oschin Telescope.[1]
It was given the minor planet number 455502 on 22 February 2016.[12]
Observations
[edit]As of 26 December 2025[update], its orbit has been secured by 513 observations across 29 oppositions, with precovery images as far back as 27 July 1954.[13]
Orbit
[edit]2003 UZ413 orbits the Sun at a distance of 30.2–48.0 astronomical units (AU) with a semi-major axis or average orbital distance of 39.1 AU once every 244 years (for reference, Neptune's orbit is at 30.1 AU).[2][14]
Its orbit has a relatively high eccentricity of 0.23 and an inclination of 12.05° with respect to the ecliptic.[2]
2003 UZ413 is in a 2:3 resonance with Neptune, which means that when it makes two revolutions around the Sun, Neptune makes exactly three.[3]
Physical characteristics
[edit]Size and albedo
[edit]The mean diameter of 2003 UZ413 is estimated to be 650+1
−175 km, assuming a low albedo of 0.075+0.076
−0.006.[5]
Rotation, shape and density
[edit]The object rotates very fast, with a period of about 4.13 hours. It was recognized as the fastest rotator known in the Kuiper belt after Haumea in 2009.[6][8]
Given its rapid rotation, if it is in hydrostatic equilibrium (and thus a dwarf planet) it must have a density higher than 0.72 g/cm3.[6] Stable Jacobi ellipsoids with an axis ratio of a/b ≥ 1.13±0.03, as implied by its light-curve amplitude of Δm = 0.13±0.03, exist for densities in the range of 2.29−3.00 g/cm3.[6] Johnston's Archive reports 2.64 g/cm3, in the center of that range.[7] This would make it an outlier among similarly sized TNOs, which are generally believed to not be dwarf planets.[15]
Composition and spectrum
[edit]
In visible light, this object is neutral or slightly red in color and has a flat, featureless reflectance spectrum.[8] 2003 UZ413 has a water ice-rich composition, similar to plutinos such as 2004 EW95 and 2002 XV93.[16]: 4 These TNOs are often classified as "prominent water"-type or "Bowl"-type TNOs. Their near-infrared spectra have a bowl-shaped water ice absorption band at around 3.0 μm wavelength.[9]: 4
Notes
[edit]References
[edit]- 1 2 Brown, M.; Trujillo, C.; Rabinowitz, D.; Marsden, B. G. (2007-09-01). "2003 UY413, 2003 UZ413, 2004 NT33, 2005 CA79, 2005 CB79, 2005 UQ513". Minor Planet Electronic Circulars. 2007-R02: 02. Bibcode:2007MPEC....R...02B. MPEC 2007-R02.
- 1 2 3 4 5 6 "JPL Small-Body Database Browser: (2003 UZ413)" (last observation: 2017-10-29). Retrieved 19 August 2019.
- 1 2 3 Marsden, B. G. (2008-07-17). "Distant Minor Planets". Minor Planet Electronic Circulars. MPEC 2008-O05. Retrieved 3 December 2010.
- ↑ Marc W. Buie (2015-09-24). "Orbit Fit and Astrometric record for 2003 UZ413". SwRI (Space Science Department). Archived from the original on 2015-09-23. Retrieved 2019-08-19.
- 1 2 3 4 5 6 7 8 Farkas-Takács, A.; Kiss, Cs.; Vilenius, E.; Marton, G.; Müller, T. G.; Mommert, M.; et al. (28 February 2020). ""TNOs are Cool": A survey of the trans-Neptunian region". Astronomy & Astrophysics. 638: A23. arXiv:2002.12712. doi:10.1051/0004-6361/201936183. S2CID 216193564.
- 1 2 3 4 5 Perna, D.; Dotto, E.; Barucci, M. A.; Rossi, A.; Fornasier, S.; de Bergh, C. (2009). "Rotations and densities of trans-Neptunian objects". Astronomy & Astrophysics. 508 (1): 451–455. Bibcode:2009A&A...508..451P. doi:10.1051/0004-6361/200911970. Retrieved 1 June 2019.
- 1 2 3 William Robert Johnston. "List of known trans-Neptunian objects". Johnston's Archive. Retrieved 2019-08-19.
- 1 2 3 Fornasier, S.; Barucci, M. A.; de Bergh, C.; Alvarez-Candal, A.; Demeo, F.; Merlin, F.; Perna, D.; Guilbert, A.; Delsanti, A.; Dotto, E.; Doressoundiram, A. (2009). "Visible spectroscopy of the new ESO large programme on trans-Neptunian objects and centaurs: Final results" (PDF). Astronomy and Astrophysics. 508 (1): 457–465. arXiv:0910.0450. Bibcode:2009A&A...508..457F. doi:10.1051/0004-6361/200912582.
- 1 2 Pinilla-Alonso, Noemí; Brunetto, Rosario; De Prá, Mário N.; Holler, Bryan J.; Hénault, Elsa; Feliciano, Ana Carolina de Souza; et al. (December 2024). "A JWST/DiSCo-TNOs portrait of the primordial Solar System through its trans-Neptunian objects" (PDF). Nature Astronomy. 9 (2): 230–244. Bibcode:2025NatAs...9..230P. doi:10.1038/s41550-024-02433-2. S2CID 274932942.
- 1 2 Perna, D.; Barucci, M.A.; Fornasier, S.; et al. (2010). "Colors and taxonomy of centaurs and trans-Neptunian objects". Astronomy and Astrophysics. 510: A53. arXiv:0912.2621. Bibcode:2010A&A...510A..53P. doi:10.1051/0004-6361/200913654.
- ↑ "2003 UZ413 Ephemerides". Asteroids Dynamic Site. Archived from the original on 2019-08-19. Retrieved 2019-08-19.
- ↑ "(455502) 2003 UZ413 Precovery Images". Andrew Lowe's Minor Planet. Retrieved 28 April 2019.
- ↑ Minor Planet Center, (455502) = 2003 UZ413
- ↑ Yeomans, Donald K. "HORIZONS Web-Interface for Neptune Barycenter (Major Body=8)". JPL Horizons On-Line Ephemeris System. Archived from the original on 7 September 2021. Retrieved 18 July 2014.—Select "Ephemeris Type: Orbital Elements", "Time Span: 2000-01-01 12:00 to 2000-01-02". ("Target Body: Neptune Barycenter" and "Center: Solar System Barycenter (@0)".)
- ↑ Grundy, W.M.; Noll, K.S.; Buie, M.W.; Benecchi, S.D.; Ragozzine, D.; Roe, H.G. (December 2019). "The Mutual Orbit, Mass, and Density of Transneptunian Binary Gǃkúnǁʼhòmdímà ((229762) 2007 UK126)". Icarus. 334: 30–38. Bibcode:2019Icar..334...30G. doi:10.1016/j.icarus.2018.12.037. S2CID 126574999. Archived from the original on 2019-04-07. Retrieved 2019-11-06.
- ↑ Souza-Feliciano, A. C.; Holler, B. J.; Pinilla-Alonso, N.; De Prá, M.; Brunetto, R.; Müller, T.; et al. (January 2024). "Spectroscopy of the binary TNO Mors-Somnus with the JWST and its relationship to the cold classical and plutino subpopulations observed in the DiSCo-TNO project". Astronomy & Astrophysics. 681: 8. Bibcode:2024A&A...681L..17S. doi:10.1051/0004-6361/202348222. S2CID 267154656. L17.
