2014 ES57

Previously risk–listed Jupiter trojan April 2021 yes 2014 ES 57 #C2FFFF DES-DECam Cerro Tololo Obs. 2 March 2014 2014 ES 57 Jupiter trojanGreek 1 July 2021 (JD 2459396.5) 0 12.05 yr (4,402 d) 22 September 2009 5.73 AU 4.80 AU 5.26 AU 0.0882 12.07 yr (4,410 d) 306° 0.0816 ms / day 6.42° 229° 203° 3.81 AU 0.191 AU 2.980 5.6 km (est.)size 14.9814.99 2014 ES 57 is a Greek camp Jupiter trojan roughly 5.6 km 1 off us in diametersize that was briefly listed on the Sentry Risk Table in April 2021 when JPL transitioned to DE441. Once listed on the Sentry Risk Table additional archived observations were quickly located that confirmed 2014 ES 57 is a harmless Jupiter trojan that does not get closer to Earth than 3.8 AU e6km unit on. Once the new astrometry was verified and published it was removed from the Sentry Risk Table on 4 May 2021. When 2014 ES 57 had a short observation arc of 3 days, some orbit solutions suggested it could be a near-Earth object that was discovered when it was near aphelion 7 AU from the Sun. As a result of the possible near-Earth orbit, the Sentry Risk Table listed a non-significant 1:1-billion chance of impacting Earth on 12 October 2059. Notes size Given an absolute magnitude (H) of 14.98 and a trojan albedo for a carbonaceous asteroid of 0.057, yields a mean diameter of around 5.6 kilometer or 3 miles. References 2014 ES57 Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=2014+ES57 18 October 2021 2021-10-11 last obs. JPL Small-Body Database Browser: 2014 ES57 https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3794222 Jet Propulsion Laboratory 18 October 2021 (Archived 6 May 2021) Earth Impact Risk Summary: 2014 ES57 NASA/JPL Near-Earth Object Program Office https://cneos.jpl.nasa.gov/sentry/details.html#?des=2014%20ES57 2021-04-27 JPL #5 DE441 (solution date:2021-Apr-15) listed as an Apollo NEO with perihelion of 0.7 AU (Wayback Machine archive) Find_Orb showing "discovery" near aphelion of 7 AU (Wayback Machine archive) List of Jupiter Trojans Minor Planet Center 27 September 2021 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 18 October 2021 Asteroid Size Estimator CNEOS NASA/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 18 October 2021 External links VI (virtual impactor) date of 2059-10-12 at 0.5AU (Wayback Machine archive) Minor Planet Mailing List (MPML) discussion (April 2021) 3794222 # Category:Minor planet object articles (unnumbered) # Category:Near-Earth objects removed from the Sentry Risk Table 20140302