Astronomy:(523692) 2014 EZ51

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(523692) 2014 EZ51
2014 EZ51 DECam 2017-03-13.png
2014 EZ51 imaged by the Dark Energy Survey in March 2017
Discovery[1]
Discovered byPan-STARRS 1
Discovery siteHaleakala Obs.
Discovery date18 April 2010
Designations
(523692) 2014 EZ51
Minor planet categoryTNO[2][3] · SDO[4] · distant[1]
Orbital characteristics[2]
Epoch 17 December 2020 (JD 2459200.5)
Uncertainty parameter 3[2] · 4[1]
Observation arc10.16 yr (3,710 d)
|{{{apsis}}}|helion}}64.420 AU
|{{{apsis}}}|helion}}40.376 AU
52.398 AU
Eccentricity0.2294
Orbital period379.29 yr (138,537 d)
Mean anomaly269.18°
Mean motion0° 0m 9.36s / day
Inclination10.281°
Longitude of ascending node27.612°
330.11°
Physical characteristics
Mean diameter
  • >575 km (occultation)[5]
  • 626 km (calculated)[6]
  • 770 km (calculated)[3]
Rotation period3.200±0.002 h[7](p4)
Geometric albedo0.09 (assumed)[3]
0.11 (assumed)[6]
Absolute magnitude (H)3.92[1][2]


(523692) 2014 EZ51 (provisional designation 2014 EZ51) is a large trans-Neptunian object in the scattered disc, approximately 700 kilometres (430 miles) in diameter. It was discovered on 18 April 2010, by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii, United States.[1]

Orbit and classification

2014 EZ51 orbits the Sun at a distance of 40.4–64.4 AU once every 379 years and 3 months (138,537 days; semi-major axis of 52.4 AU). Its orbit has an eccentricity of 0.23 and an inclination of 10° with respect to the ecliptic.[2] The body's observation arc begins with its official discovery observation at Haleakala in April 2010.[1]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 25 September 2018 (M.P.C. 111779).[8] (As of February 2023), it has not been named.[1]

Physical characteristics

According to Michael Brown and the Johnston's archive, 2014 EZ51 measures 626 and 770 kilometers in diameter, based on an absolute magnitude of 4.2 and 3.8, with an assumed albedo of 0.10 and 0.09, respectively.[6][3] The MPC/JPL databases give an absolute magnitude of 3.92.[1][2] On 25 February 2019, a stellar occultation by 2014 EZ51 was observed in New Zealand. From these observations, a lower limit of 575 km was placed for its mean diameter.[5]

In 2023, a study on photometric observations of trans-Neptunian objects by the Kepler space telescope found that 2014 EZ51 rotates with a period of 3.2 hours and exhibits a light curve amplitude of 0.145±0.026 magnitudes, which indicates its shape must be elongated.[7](p4, 10)

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "523692 (2014 EZ51)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=523692. Retrieved 10 July 2021. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "JPL Small-Body Database Browser: 523692 (2014 EZ51)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2523692. Retrieved 10 July 2021. 
  3. ↑ 3.0 3.1 3.2 3.3 "List of Known Trans-Neptunian Objects". Johnston's Archive. 22 July 2017. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 9 October 2018. 
  4. ↑ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. https://www.minorplanetcenter.net/iau/lists/t_centaurs.html. Retrieved 9 October 2018. 
  5. ↑ 5.0 5.1 Loader, B.; Hanna, W. (25 February 2019). "(523692) 2014 EZ51, 2019 February 25 occultation". http://www.occultations.org.nz/planet/2019/results/20190225_523692_2014EZ51_UCAC4_322-079801_Plot_Colour.png. Retrieved 5 January 2020. 
  6. ↑ 6.0 6.1 6.2 Brown, Michael E.. "How many dwarf planets are there in the outer solar system? – "2014EZ51"". California Institute of Technology. http://web.gps.caltech.edu/~mbrown/dps.html. Retrieved 10 July 2021. 
  7. ↑ 7.0 7.1 Kecskeméthy, ViktóriaExpression error: Unrecognized word "etal". (January 2023). "Light Curves of Trans-Neptunian Objects from the K2 Mission of the Kepler Space Telescope". The Astrophysical Journal Supplement Series 264 (1): 20. doi:10.3847/1538-4365/ac9c67. 18. Bibcode: 2023ApJS..264...18K. 
  8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 9 October 2018. 

External links



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