(523692) 2014 EZ51
(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 classification2014 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 namingThis 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 characteristicsAccording 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
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