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(42301) 2001 UR163

January 01, 1970

(42301) 2001 UR163 (provisional designation 2001 UR163) is a resonant trans-Neptunian object and possible dwarf planet located in the outermost region of the Solar System. The object measures approximately 352 kilometers (220 miles) in diameter with a high albedo and stays in an uncommon orbital resonance (4:9) with Neptune. It was discovered on 21 October 2001 by astronomers of the Deep Ecliptic Survey program at Kitt Peak National Observatory near Tucson, Arizona, United States. As of 2021, it has not been named.[1]

(42301) 2001 UR163
Hubble Space Telescope image of 2001 UR163 taken in 2005
Discovery[1][2]
Discovered byDES
Discovery siteKitt Peak National Obs.
Discovery date21 October 2001
Designations
(42301) 2001 UR163
2001 UR163
TNO[3] · 4:9 res[4][5]
distant[1]
Orbital characteristics[3]
Epoch 1 July 2021 (JD 2459396.5)
Uncertainty parameter 2[1][3]
Observation arc38.45 yr (14,045 d)
Aphelion66.643 AU
Perihelion36.987 AU
51.815 AU
Eccentricity0.2862
372.98 yr (136,232 d)
80.814°
0° 0m 9.36s / day
Inclination0.7531°
301.39°
8 October 1937
344.50°
Physical characteristics
Mean diameter
352±85 km[4][6]: 26 
0.209±0.08[4][6]
21.3[9]
4.21[1][3]

Classification and orbit edit

2001 UR163 has been characterized as a dwarf planet candidate.[10] Based on assumptions and estimates, Michael Brown gives it a "likely"-status on his website, which is the third highest status after "near certainty" and "highly likely" (also see his classification table).[11]

The object orbits the Sun at a distance of 37.0–66.6 AU once every 372 years and 12 months (136,232 days; semi-major axis of 51.82 AU). Its orbit has an eccentricity of 0.29 and an inclination of 1° with respect to the ecliptic.[3] It came to perihelion on 8 October 1937, and has since been moving away from the Sun.[3] In 2006, it moved beyond a distance of 50 AU and is at 53.7 AU as of 2021.[9] The body's observation arc begins with a precovery, published by the Digitized Sky Survey and taken at the Siding Spring Observatory in July 1982.[1]

Numbering and naming edit

2001 UR163 was numbered (42301) by the Minor Planet Center on 26 May 2002 (M.P.C. 45686).[12] As of 2021, it has not been named.[1] Acoording to the established naming conventions, it will receive a mythological or mythic name (not necessarily from Classical mythology), in particular one associated with creation.[13]

Physical characteristics edit

Lightcurve analysis shows only small deviations, suggesting that 2001 UR163 is a spheroid with small albedo spots.[10] Observations with Spitzer's Infrared Array Camera were used to study the body's surface composition. The analyzed data indicate the presence of 20% water ice, 60% amorphous silicates, and 20% organic compounds, including complex ones such as tholins.[6]: 20 

Diameter and albedo edit

2001 UR163 measures approximately 352 kilometers (220 miles) in diameter with a high albedo of 0.209.[4][6]: 26 

Based on previous estimates published on the Lightcurve Data Base and on Michael Brown's website, 2001 UR163 measures between 531 km (330 mi) and 583 kilometers (360 miles), using an assumed intermediate surface albedo of 0.09 to 0.10 with an absolute magnitude of 4.49 and 4.4, respectively.[7][11]

See also edit

References edit

  1. ^ a b c d e f g "42301 (2001 UR163)". Minor Planet Center. Retrieved 27 July 2021.
  2. ^ Marsden, Brian G. (14 November 2001). . IAU – Minor Planet Center. Minor Planet Electronic Circulars. Archived from the original on 11 April 2010. (K01UG3R*)
  3. ^ a b c d e f "JPL Small-Body Database Browser: 42301 (2001 UR163)" (2021-01-08 last obs.). Jet Propulsion Laboratory. Retrieved 27 July 2021.
  4. ^ a b c d Johnston, Wm. Robert (18 August 2020). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 27 July 2021.
  5. ^ Marc W. Buie. "Orbit Fit and Astrometric record for 42301". SwRI–Southwest Research Institute. Retrieved 27 July 2021.The Deep Ecliptic Survey Object Classifications
  6. ^ a b c d e Fernández-Valenzuela, E.; Pinilla-Alonso, N.; Stansberry, J.; Emery, J. P.; Perkins, W.; Van Laerhoven, C.; et al. (February 2021). "Compositional Study of Trans-Neptunian Objects at λ > 2.2 μm". The Planetary Science Journal. 2 (1): 10. arXiv:2011.07121. Bibcode:2021PSJ.....2...10F. doi:10.3847/PSJ/abc34e. ISSN 2632-3338. S2CID 234003733.
  7. ^ a b "LCDB Data for (42301)". Asteroid Lightcurve Database (LCDB). Retrieved 27 July 2021.
  8. ^ a b c d Belskaya, Irina N.; Barucci, Maria A.; Fulchignoni, Marcello; Dovgopol, Anatolij N. (April 2015). "Updated taxonomy of trans-neptunian objects and centaurs: Influence of albedo". Icarus. 250: 482–491. Bibcode:2015Icar..250..482B. doi:10.1016/j.icarus.2014.12.004.
  9. ^ a b "Asteroid (42301) 2001 UR163 – Ephemerides". AstDyS-2, Asteroids – Dynamic Site, Department of Mathematics, University of Pisa. Retrieved 27 July 2021.
  10. ^ a b Tancredi, Gonzalo; Favre, Sofía (June 2008). "Which are the dwarfs in the Solar System?" (PDF). Icarus. 195 (2): 851–862. Bibcode:2008Icar..195..851T. doi:10.1016/j.icarus.2007.12.020. ISSN 0019-1035.
  11. ^ a b Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 31 August 2016.
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 27 July 2021.
  13. ^ "Naming of Astronomical Objects – Minor planets". IAU – International Astronomical Union. Retrieved 27 July 2021.

External links edit

  • List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
  • Red Planetoid Sedna covered in tar-colored sludge
  • Asteroid Lightcurve Database (LCDB), query form (info 16 December 2017 at the Wayback Machine)
  • Discovery Circumstances: Numbered Minor Planets (40001)-(45000), Minor Planet Center
  • (42301) 2001 UR163, Small Bodies Data Ferret
  • (42301) 2001 UR163 at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • (42301) 2001 UR163 at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters


January 01, 1970
42301, 2001, 42301, 2001, ur163, provisional, designation, 2001, ur163, resonant, trans, neptunian, object, possible, dwarf, planet, located, outermost, region, solar, system, object, measures, approximately, kilometers, miles, diameter, with, high, albedo, st. 42301 2001 UR163 provisional designation 2001 UR163 is a resonant trans Neptunian object and possible dwarf planet located in the outermost region of the Solar System The object measures approximately 352 kilometers 220 miles in diameter with a high albedo and stays in an uncommon orbital resonance 4 9 with Neptune It was discovered on 21 October 2001 by astronomers of the Deep Ecliptic Survey program at Kitt Peak National Observatory near Tucson Arizona United States As of 2021 update it has not been named 1 42301 2001 UR163Hubble Space Telescope image of 2001 UR163 taken in 2005Discovery 1 2 Discovered byDESDiscovery siteKitt Peak National Obs Discovery date21 October 2001DesignationsMPC designation 42301 2001 UR163Alternative designations2001 UR163Minor planet categoryTNO 3 4 9 res 4 5 distant 1 Orbital characteristics 3 Epoch 1 July 2021 JD 2459396 5 Uncertainty parameter 2 1 3 Observation arc38 45 yr 14 045 d Aphelion66 643 AUPerihelion36 987 AUSemi major axis51 815 AUEccentricity0 2862Orbital period sidereal 372 98 yr 136 232 d Mean anomaly80 814 Mean motion0 0m 9 36s dayInclination0 7531 Longitude of ascending node301 39 Time of perihelion8 October 1937Argument of perihelion344 50 Physical characteristicsMean diameter352 85 km 4 6 26 Geometric albedo0 209 0 08 4 6 Spectral typeRR U very red 7 8 6 B V 1 25 0 11 8 V R 0 88 0 06 8 V I 1 54 0 16 8 Apparent magnitude21 3 9 Absolute magnitude H 4 21 1 3 Contents 1 Classification and orbit 2 Numbering and naming 3 Physical characteristics 3 1 Diameter and albedo 4 See also 5 References 6 External linksClassification and orbit edit2001 UR163 has been characterized as a dwarf planet candidate 10 Based on assumptions and estimates Michael Brown gives it a likely status on his website which is the third highest status after near certainty and highly likely also see his classification table 11 The object orbits the Sun at a distance of 37 0 66 6 AU once every 372 years and 12 months 136 232 days semi major axis of 51 82 AU Its orbit has an eccentricity of 0 29 and an inclination of 1 with respect to the ecliptic 3 It came to perihelion on 8 October 1937 and has since been moving away from the Sun 3 In 2006 it moved beyond a distance of 50 AU and is at 53 7 AU as of 2021 update 9 The body s observation arc begins with a precovery published by the Digitized Sky Survey and taken at the Siding Spring Observatory in July 1982 1 Numbering and naming edit2001 UR163 was numbered 42301 by the Minor Planet Center on 26 May 2002 M P C 45686 12 As of 2021 update it has not been named 1 Acoording to the established naming conventions it will receive a mythological or mythic name not necessarily from Classical mythology in particular one associated with creation 13 Physical characteristics editLightcurve analysis shows only small deviations suggesting that 2001 UR163 is a spheroid with small albedo spots 10 Observations with Spitzer s Infrared Array Camera were used to study the body s surface composition The analyzed data indicate the presence of 20 water ice 60 amorphous silicates and 20 organic compounds including complex ones such as tholins 6 20 Diameter and albedo edit 2001 UR163 measures approximately 352 kilometers 220 miles in diameter with a high albedo of 0 209 4 6 26 Based on previous estimates published on the Lightcurve Data Base and on Michael Brown s website 2001 UR163 measures between 531 km 330 mi and 583 kilometers 360 miles using an assumed intermediate surface albedo of 0 09 to 0 10 with an absolute magnitude of 4 49 and 4 4 respectively 7 11 See also editList of Solar System objects most distant from the SunReferences edit a b c d e f g 42301 2001 UR163 Minor Planet Center Retrieved 27 July 2021 Marsden Brian G 14 November 2001 MPEC 2001 V57 2001 QX322 2001 UR163 2001 VN71 IAU Minor Planet Center Minor Planet Electronic Circulars Archived from the original on 11 April 2010 K01UG3R a b c d e f JPL Small Body Database Browser 42301 2001 UR163 2021 01 08 last obs Jet Propulsion Laboratory Retrieved 27 July 2021 a b c d Johnston Wm Robert 18 August 2020 List of Known Trans Neptunian Objects Johnston s Archive Retrieved 27 July 2021 Marc W Buie Orbit Fit and Astrometric record for 42301 SwRI Southwest Research Institute Retrieved 27 July 2021 The Deep Ecliptic Survey Object Classifications a b c d e Fernandez Valenzuela E Pinilla Alonso N Stansberry J Emery J P Perkins W Van Laerhoven C et al February 2021 Compositional Study of Trans Neptunian Objects at l gt 2 2 mm The Planetary Science Journal 2 1 10 arXiv 2011 07121 Bibcode 2021PSJ 2 10F doi 10 3847 PSJ abc34e ISSN 2632 3338 S2CID 234003733 a b LCDB Data for 42301 Asteroid Lightcurve Database LCDB Retrieved 27 July 2021 a b c d Belskaya Irina N Barucci Maria A Fulchignoni Marcello Dovgopol Anatolij N April 2015 Updated taxonomy of trans neptunian objects and centaurs Influence of albedo Icarus 250 482 491 Bibcode 2015Icar 250 482B doi 10 1016 j icarus 2014 12 004 a b Asteroid 42301 2001 UR163 Ephemerides AstDyS 2 Asteroids Dynamic Site Department of Mathematics University of Pisa Retrieved 27 July 2021 a b Tancredi Gonzalo Favre Sofia June 2008 Which are the dwarfs in the Solar System PDF Icarus 195 2 851 862 Bibcode 2008Icar 195 851T doi 10 1016 j icarus 2007 12 020 ISSN 0019 1035 a b Michael E Brown How many dwarf planets are there in the outer solar system updates daily California Institute of Technology Retrieved 31 August 2016 MPC MPO MPS Archive Minor Planet Center Retrieved 27 July 2021 Naming of Astronomical Objects Minor planets IAU International Astronomical Union Retrieved 27 July 2021 External links editList Of Centaurs and Scattered Disk Objects Minor Planet Center The Meudon Multicolor Survey 2MS of Centaurs and Trans Neptunian objects TNO Colors KBO Surface Colors Red Planetoid Sedna covered in tar colored sludge Asteroid Lightcurve Database LCDB query form info Archived 16 December 2017 at the Wayback Machine Discovery Circumstances Numbered Minor Planets 40001 45000 Minor Planet Center 42301 2001 UR163 Small Bodies Data Ferret 42301 2001 UR163 at AstDyS 2 Asteroids Dynamic Site Ephemeris Observation prediction Orbital info Proper elements Observational info 42301 2001 UR163 at the JPL Small Body Database nbsp Close approach Discovery Ephemeris Orbit diagram Orbital elements Physical parameters Retrieved from https en wikipedia org w index php title 42301 2001 UR163 amp oldid 1196915558, wikipedia, wiki, book, books, library,

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