(523692) 2014 EZ51

(523692) 2014 EZ₅₁

2014 EZ51 imaged by the Dark Energy Survey in March 2017
Discovery[1]
Discovered by	Pan-STARRS 1
Discovery site	Haleakala Obs.
Discovery date	18 April 2010
Designations
MPC designation	(523692) 2014 EZ51
Minor planet category	TNO[2][3] · SDO[4] · distant[1]
Orbital characteristics[2]
Epoch 17 December 2020 (JD 2459200.5)
Uncertainty parameter 3[2] · 4[1]
Observation arc	10.16 yr (3,710 d)
Aphelion	64.420 AU
Perihelion	40.376 AU
Semi-major axis	52.398 AU
Eccentricity	0.2294
Orbital period (sidereal)	379.29 yr (138,537 d)
Mean anomaly	269.18°
Mean motion	0° 0^m 9.36^s / day
Inclination	10.281°
Longitude of ascending node	27.612°
Argument of perihelion	330.11°
Physical characteristics
Mean diameter	>575 km (occultation)[5] 626 km (calculated)[6] 770 km (calculated)[3]
Synodic rotation period	3.200±0.002 h[7]: 4
Geometric albedo	0.09 (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^[update], 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 on 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]: 4, 10}

References

1. "523692 (2014 EZ51)". Minor Planet Center. Retrieved 10 July 2021.
2. "JPL Small-Body Database Browser: 523692 (2014 EZ51)" (2020-06-14 last obs.). Jet Propulsion Laboratory. Retrieved 10 July 2021.
3. "List of Known Trans-Neptunian Objects". Johnston's Archive. 22 July 2017. Retrieved 9 October 2018.
4. "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 9 October 2018.
5. Loader, B.; Hanna, W. (25 February 2019). "(523692) 2014 EZ51, 2019 February 25 occultation". occultations.org.nz. Retrieved 5 January 2020.
6. Brown, Michael E. "How many dwarf planets are there in the outer solar system? – "2014EZ51"". California Institute of Technology. Retrieved 10 July 2021.
7. Kecskeméthy, Viktória; Kiss, Csaba; Szakáts, Róbert; Pál, András; Szabó, Gyula M.; Molnár, László; et al. (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. arXiv:2210.06571. Bibcode:2023ApJS..264...18K. doi:10.3847/1538-4365/ac9c67. S2CID 119343798. 18.
8. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 9 October 2018.

External links

• Discovery Circumstances: Numbered Minor Planets (520001)-(525000) – Minor Planet Center
• (523692) 2014 EZ51 at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• (523692) 2014 EZ51 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters