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| |url= https://www.npr.org/sections/thetwo-way/2016/10/11/497071139/a-friend-for-pluto-astronomers-find-new-dwarf-planet-in-our-solar-system | |url= https://www.npr.org/sections/thetwo-way/2016/10/11/497071139/a-friend-for-pluto-astronomers-find-new-dwarf-planet-in-our-solar-system | ||
| |title= A Friend for Pluto: Astronomers Find New Dwarf Planet in Our Solar System | |title= A Friend for Pluto: Astronomers Find New Dwarf Planet in Our Solar System | ||
| }}</ref> It has a diameter of ~{{Convert|635|km|mi|abbr=on}} and reflects just 13 percent of the sunlight that hits it on its 1, |
}}</ref> It has a diameter of ~{{Convert|635|km|mi|abbr=on}} and reflects just 13 percent of the sunlight that hits it on its approximately 1,100 year orbit around the Sun.<ref name="Gerdes2017"/><ref name=jpldata/> Since the numbering of {{mpl|(532037) 2013 FY|27}} in May 2019, {{mp|2014 UZ|224}} may be the largest ] object in the Solar System.<ref name="Brown-dplist">{{Citation|url=http://web.gps.caltech.edu/~mbrown/dps.html|title=How many dwarf planets are there in the outer solar system?|date=20 May 2019|access-date=1 June 2019|author=Brown, M.}}</ref> The earliest known ] observations of {{mp|2014 UZ|224}} were taken at the ] on 15 October 2006.<ref name="MPC-object"/> | ||
| == See also == | == See also == | ||
Revision as of 02:16, 6 January 2021
 2014 UZ224 imaged by ALMA | |
| Discovery | |
|---|---|
| Discovered by | David Gerdes et al. |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 19 August 2014 announced: 11 October 2016 |
| Designations | |
| MPC designation | 2014 UZ224 |
| Minor planet category | TNO · SDO p-DP |
| Orbital characteristics | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 6 | |
| Observation arc | 12.08 yr (4,414 days) |
| Earliest precovery date | 15 October 2006 |
| Aphelion | 176.371±3.189 AU |
| Perihelion | 38.324±0.189 AU |
| Semi-major axis | 107.347±1.941 AU |
| Eccentricity | 0.64299 |
| Orbital period (sidereal) | 1112.23±30.17 yr (406,243 days) |
| Mean anomaly | 320.258±1.484° |
| Mean motion | 0° 0 3.19 / day |
| Inclination | 26.790° |
| Longitude of ascending node | 130.700±0.013° |
| Argument of perihelion | 30.050±0.408° |
| Physical characteristics | |
| Mean diameter | 635+65 −72 km |
| Geometric albedo | 0.131+0.038 −0.028 |
| Spectral type | G–R = 0.77±0.11 |
| Apparent magnitude | 23.38±0.05 |
| Absolute magnitude (H) | 3.5 · 3.4 |
2014 UZ224 is a trans-Neptunian object (TNO) and possible dwarf planet orbiting in the scattered disc. As of October 2018, it was approximately 90.7 astronomical units (1.357×10 km) from the Sun, and will slowly decrease in distance until it reaches its perihelion of 38 AU sometime near 2142. The discoverers have nicknamed it "DeeDee" for "Distant Dwarf".
2014 UZ224 was discovered by a team led by David Gerdes using data collected by the large camera Dark Energy Camera (DECam). It has a diameter of ~635 km (395 mi) and reflects just 13 percent of the sunlight that hits it on its approximately 1,100 year orbit around the Sun. Since the numbering of (532037) 2013 FY27 in May 2019, 2014 UZ224 may be the largest unnumbered object in the Solar System. The earliest known precovery observations of 2014 UZ224 were taken at the Mauna Kea Observatory on 15 October 2006.
See also
References
- "MPEC MPEC 2016-T104 : 2014 UZ224". IAU Minor Planet Center. 11 October 2016. Retrieved 11 October 2016. (K14UM4Z)
- ^ "JPL Small-Body Database Browser: (2014 UZ224)" (last observation: 2018-11-15; arc: 4.24 years). Jet Propulsion Laboratory. Retrieved 11 October 2016.
- ^ Gerdes, D. W.; Sako, M.; Hamilton, S.; Zhang, K.; Khain, T.; Becker, J. C.; et al. (April 2017). "Discovery and Physical Characterization of a Large Scattered Disk Object at 92 AU". The Astrophysical Journal Letters. 839 (1): 7. arXiv:1702.00731. Bibcode:2017ApJ...839L..15G. doi:10.3847/2041-8213/aa64d8. S2CID 35694455.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Brown, M. (20 May 2019), How many dwarf planets are there in the outer solar system?, retrieved 1 June 2019
- ^ "2014 UZ224". Minor Planet Center. International Astronomical Union. Retrieved 5 January 2021.
- "Soon you won't care about a newly discovered dwarf planet". Wired. 18 October 2016.
- "New dwarf planet solar system's 2nd most distant". Umich.edu.
- Cofield, Calla. "New Dwarf Planet Found in Our Solar System". Scientific American. Retrieved 12 October 2016.
- "A Friend for Pluto: Astronomers Find New Dwarf Planet in Our Solar System".
External links
- 2014 UZ224 ("DeeDee") Fact Sheet
- 2014 UZ224 at AstDyS-2, Asteroids—Dynamic Site
- 2014 UZ224 at the JPL Small-Body Database
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