2011 EO40

Asteroid February 2018 yes #FFC2E0 2011 EO 40 Richard A. Kowalski(Mount Lemmon Survey) 10 March 2011 2011 EO 40 Apollo NEO PHAList Of Apollo Minor Planetshttp://www.minorplanetcenter.net/iau/lists/Dangerous.html List Of The Potentially Hazardous Asteroids (PHAs) Minorplanetcenter.net 2014-06-27 Earth crosser https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2011EO40&view=OPC JPL Small-Body Database Browser: (2011 EO40) Jet Propulsion Laboratory 2 August 2022NEODyS-2 on 2011 EO40 Retrieved 2013-07-31 21 November 2025 (JD 2461000.5) 2.5481 AU Gm on on 0.76020 AU Gm on 1.65416 AU Gm on 0.54043 2.1275 yr (777.08 d) 3.3615° 50.172° 17.230° 5.6° 120–280 mA a noneAsteroid Size Estimator 21.9 0.46327 ms / day 1 0.048041 AU Gm on 2.79521 AU Gm on 2011 EO 40 is an asteroid, classified as a near-Earth object and a potentially hazardous asteroid of the Apollo group. It is a possible candidate for the parent body of the Chelyabinsk superbolide.The Chelyabinsk superbolide: a fragment of asteroid 2011 EO40? Carlos de la Fuente Marcos de la Fuente Marcos Raúl 21 November 2013 Monthly Notices of the Royal Astronomical Society: Letters 436 1 L15–L19 1307.7918 2013MNRAS.436L..15D 10.1093/mnrasl/slt103 free Reconstructing the Chelyabinsk event: pre-impact orbital evolution Carlos de la Fuente Marcos de la Fuente Marcos Raúl 1 September 2014 Monthly Notices of the Royal Astronomical Society: Letters 443 1 L39–L43 1405.7202 2014MNRAS.443L..39D 10.1093/mnrasl/slu078 free Chasing the Chelyabinsk asteroid N-body style Carlos de la Fuente Marcos de la Fuente Marcos Raúl S. J. Aarseth 10 October 2015 The Astrophysical Journal 812 1 26 (22 pp) 1508.05907 2015ApJ...812...26D 10.1088/0004-637X/812/1/26 Discovery, orbit and physical properties 2011 EO 40 was discovered by Richard A. Kowalski on 10 March 2011 while observing for the Mount Lemmon Survey.Discovery MPEC Its orbit is typical of Apollo asteroids and is characterized by significant eccentricity (0.54), low inclination (3.36º), and a semi-major axis of 1.65 AU.MPC data on 2011 EO40 Upon discovery, it was classified as an Earth crosser, a near-Earth asteroid (NEA) and a potentially hazardous asteroid (PHA) by the Minor Planet Center. It was listed on the Sentry Risk Table for less than one day. Its orbit is in need of additional observations to determine if it is part of an asteroid family; as of October 2015 the orbit is determined using just twenty observations spanning an observation arc of 34 days. 2011 EO 40 has an absolute magnitude of 21.5, which gives a characteristic diameter of about 200 m ft. Relationship to the Chelyabinsk superbolide Recent calculations indicate that this object is a plausible candidate to be the parent body of the Chelyabinsk superbolide, since its orbit is very similar to the computed, pre-impact path of the Chelyabinsk meteoroid. It has relatively frequent close encounters with Venus, the Earth–Moon system, and Mars. It had a close encounter with Earth on 28 January 2011 at 0.0953 AU km mi on on, and it will have a nominal Earth approach on 23 September 2025 at about 0.06 AU km mi on off. Asteroid 2011 EO 40 experiences close approaches to the Earth–Moon system following a rather regular pattern, every 17 years approximately due to the combined action of multiple secular resonances. Visibility 2011 EO 40 had opposition windows on 7 June 2016 at magnitude 24.5, and 28 May 2018 at magnitude 24.6 but was not observed during either opposition. The asteroid was recovered on 15 August 2025 by Pan-STARRS.MPEC 2025-Q20 : 2011 EO40 https://www.minorplanetcenter.net/mpec/K25/K25Q20.html 2026-02-25 www.minorplanetcenter.net The best observation window was on 2–23 September 2025. Depending on the Earth approach distance (0.04–0.12 AU), it should have been brighter than magnitude 19. See also Carbonaceous chondrite Meteorite Notes A a none This is assuming an albedo of 0.20–0.04. References 2011-03-11 Observations of small Solar-System bodies hohmanntransfer http://www.hohmanntransfer.com/mn/11/11070_0311.htm#2011EO40 2013-08-06 23 November 2020 https://web.archive.org/web/20201123225940/http://www.hohmanntransfer.com/mn/11/11070_0311.htm#2011EO40 dead (2.7e-07 = 1 in 3,704,000 chance) 2011EO40 Ephemerides for 23 August 2025 through 30 September 2025 NEODyS (Near Earth Objects Dynamic Site) https://newton.spacedys.com/neodys2/index.php?pc=1.1.3.1&n=2011EO40&oc=500&y0=2025&m0=8&d0=23&h0=0&mi0=0&y1=2025&m1=9&d1=30&h1=0&mi1=0&ti=1.0&tiu=days 2014-07-04 External links 2011 EO 40 data at MPC MPEC 2011-E59 : 2011 EO40 (Discovery MPEC) Russian meteor may have gangmates in tow, Nature, short article Has the Chelyabinsk Meteor Parent Asteroid Been Found?, Bad Astronomy blog entry 2011+EO40 2011EO40 # Category:Minor planet object articles (unnumbered) Category:Discoveries by Richard Kowalski Category:Earth-crossing asteroids # # 20110310