(341843) 2008 EV5

Aten asteroid October 2019 yes (341843) 2008 EV 5 #FFC2E0 2008 EV5 orbit 2010.png Diagram of 2008 EV 5's Earth-crossing orbit Mount Lemmon Srvy. Mount Lemon Obs. 4 March 2008 (341843) 2008 EV 5 NEOAtenPHA 4 September 2017 (JD 2458000.5) 1 2.10 yr (768 days) 1.0383 AU 0.8783 AU 0.9583 AU 0.0835 0.94 yr (343 days) 213.55° 1.0506 ms / day 7.4368° 93.390° 234.81° 0.0149 AU LD on on (420 × 410 × 390) m 0.370 0.006 km0.400 0.014 km0.400 0.034 km0.400 0.050 km 3.717 0.008 h3.725 h3.7255 0.002 h7.2 h10.200 0.002 h 0.104 0.3120.12 0.040.13 0.050.137 0.0130.1373 0.0129 XCS (assumed) 19.719.9120.020.0 0.4 (341843) 2008 EV 5 is a sub-kilometer asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Aten group, approximately 400 m ft off in diameter. It was discovered on 4 March 2008, by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory near Tucson, Arizona, United States. Origin and orbital history 2008 EV 5 started its existence as part of a much larger body in the asteroid belt, with a likely diameter greater than 100 kilometers. 2008 EV 5's immediate history likely started when its parent body experienced a large cratering event or, more likely, a catastrophic disruption event that resulted in a highly fractured, shattered, or reaccumulated object (rubble pile). As a result, 2008 EV 5 may have been produced as a reassembly of ejected fragments. The location of what is now 2008 EV 5 within this parent body is unknown. Given the available modeling work and data, the most plausible source family candidates for 2008 EV 5 are Eulalia, New Polana, and Erigone. This assumes that 2008 EV 5's true albedo is considerably lower than 10%. If it does have a high albedo, a plausible source would be a population of high-albedo C-type asteroids in the inner asteroid belt. Second tier candidate families for the high-albedo case are Baptistina and Pallas. From here, the newly liberated 2008 EV 5 began to change via the forces referred to as the Yarkovsky and YORP effects. The Yarkovsky effect describes a small force that affects orbital motion. It is caused by sunlight; when objects heat up in the Sun, they reradiate the energy away as heat, which in turn creates a tiny thrust. This recoil acceleration is much weaker than solar and planetary gravitational forces, but it can produce substantial orbital changes over timescales ranging from many millions to billions of years. The same physical phenomenon also creates a thermal torque that probably caused 2008 EV 5 to take on a top-like appearance. Dynamical models indicate that 2008 EV 5 migrated inward across the inner asteroid belt over long timescales (i.e. the order of ~0.01–1 Gyr) until it reached a planetary gravitational resonance that drove it into the near-Earth asteroid (NEA) population over a timescale of the order of ~1 Myr. From there, gravitational interactions with both the planets and resonances allowed it to reach its current orbit within a few Myr to a few tens of Myr. Close approaches On 23 December 2008, 2008 EV 5 made a close approach to Earth at a distance of 8.4 lunar distances (0.022 AU, 3.2 million km), its closest until 2169. Its brightness peaked on 26 December about 13.2 magnitude. thumb|left|500px|2008 Path of 2008 EV 5 close approach, with 3 day motion markers +Earth Approach on 20 December 2023 Date JPL Horizonsnominal geocentricdistance (AU) uncertaintyregion(3-sigma)2023-Dec-20 06:52 0.04226 AU e6km unit on ±1741 km left Physical characteristics thumb|200px|left|Radar-based shape model of 2008 EV 5 2008 EV 5 is an oblate spheroid (also described as "muffin-shaped"Wall Mike NASA wants to pluck a boulder from an asteroid. But which asteroid? https://www.csmonitor.com/Science/2015/0326/NASA-wants-to-pluck-a-boulder-from-an-asteroid.-But-which-asteroid 26 March 2015 AP News 24 December 2018 ) 400 m ft on in diameter. It rotates very slowly in a retrograde direction. There is a 150 m ft on diameter concave feature, possibly an impact crater, or a relic feature from a previous episode of rapid rotation that caused the asteroid's shape to reconfigure. Visible and near-infrared spectroscopy show that 2008 EV 5's composition is similar to that of carbonaceous chondrite meteorites. Proposed sample return mission 2008 EV 5 was the preliminary baseline target of NASA's proposed sample-return Asteroid Redirect Mission. Besides 2008 EV 5, several other asteroids, including Itokawa and Bennu, were considered for this mission, before its cancellation in 2017. See also Asteroid Redirect Mission List of minor planets: 341001–342000 References 2010-04-11 last obs. JPL Small-Body Database Browser: 341843 (2008 EV5) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=341843&view=OPC Jet Propulsion Laboratory 17 January 2018 341843 (2008 EV5) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=341843 17 January 2018 Asteroids and comets rotation curves – (341843) Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page5cou.html#341843 17 January 2018 https://web.archive.org/web/20181111134209/http://obswww.unige.ch/~behrend/page5cou.html#341843 11 November 2018 dead 6 A. Mainzer T. Grav J. Bauer J. Masiero R. S. McMillan R. M. Cutri R. Walker E. Wright P. Eisenhardt D. J. Tholen T. Spahr R. Jedicke L. Denneau E. DeBaun D. Elsbury T. Gautier S. Gomillion E. Hand W. Mo J. Watkins A. Wilkins G. L. Bryngelson A. Del Pino Molina S. Desai M. Gómez Camus S. L. Hidalgo I. Konstantopoulos J. A. Larsen C. Maleszewski M. A. Malkan J.-C. Mauduit B. L. Mullan E. W. Olszewski J. Pforr A. Saro J. V. Scotti L. H. Wasserman December 2011 NEOWISE Observations of Near-Earth Objects: Preliminary Results The Astrophysical Journal 743 2 17 2011ApJ...743..156M 10.1088/0004-637X/743/2/156 1109.6400 239991 Mazanek Daniel Reeves David Asteroid Redirect Mission (ARM) Formulation Assessment and Support Team (FAST) Final Report http://www.nasa.gov/sites/default/files/atoms/files/nasa-tm-2016-219011-arm-fast-final-report_0.pdf NASA Official National Aeronautics and Space Administration 20 February 2016 Steitz David E. RELEASE 15-050 - NASA Announces Next Steps on Journey to Mars: Progress on Asteroid Initiative http://www.nasa.gov/press/2015/march/nasa-announces-next-steps-on-journey-to-mars-progress-on-asteroid-initiative/ 25 March 2015 NASA 26 March 2015 Borenstein Seth NASA details plans to pluck rock off asteroid, explore it http://apnews.excite.com/article/20150325/us-sci-nasa-asteroid-mission-6017a68416.html 25 March 2015 AP News 26 March 2015 1 April 2015 https://web.archive.org/web/20150401010746/http://apnews.excite.com/article/20150325/us-sci-nasa-asteroid-mission-6017a68416.html dead 6 Vishnu Reddy Lucille Le Corre Michael Hicks Kenneth Lawrence Bonnie J. Buratti Paul A. Abell Michael J. Gaffey Paul S. Hardersen November 2012 Composition of near-Earth Asteroid 2008 EV5: Potential target for robotic and human exploration Icarus 221 2 678–681 2012Icar..221..678R 10.1016/j.icarus.2012.08.035 1209.1207 119243535 Alessandro Morbidelli William F. Bottke David Nesvorný Harold F. Levison December 2009 Asteroids were born big Icarus 204 2 558–573 2009Icar..204..558M 10.1016/j.icarus.2009.07.011 0907.2512 12632943 Q.-z. Ye February 2011 BVRI Photometry of 53 Unusual Asteroids The Astronomical Journal 141 2 32 2011AJ....141...32Y 10.1088/0004-6256/141/2/32 1011.0133 119307210 Kevin J. Walsh Derek C. Richardson Patrick Michel July 2008 Rotational breakup as the origin of small binary asteroids Nature 454 7201 188–191 2008Natur.454..188W 10.1038/nature07078 18615078 4418744 341843 17 January 2018 6 A. Mainzer T. Grav J. Masiero E. Hand J. Bauer D. Tholen R. S. McMillan T. Spahr R. M. Cutri E. Wright J. Watkins W. Mo C. Maleszewski November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 118700974 6 Michael W. Busch Steven J. Ostro Lance A. M. Benner Marina Brozovic Jon D. Giorgini Joseph S. Jao Daniel J. Scheeres Christopher Magri Michael C. Nolan Ellen S. Howell Patrick A. Taylor Jean-Luc Margot Walter Brisken April 2011 Radar observations and the shape of near-Earth ASTEROID 2008 EV5 http://echo.jpl.nasa.gov/asteroids/2008EV5/busch.etal.2011.2008ev5.pdf Icarus 212 2 649–660 2011Icar..212..649B 10.1016/j.icarus.2011.01.013 1101.3794 56469588 17 January 2018 V. Alí-Lagoa L. Lionni M. Delbo B. Gundlach J. Blum J. Licandro January 2014 Thermophysical properties of near-Earth asteroid (341843) 2008 EV5 from WISE data Astronomy and Astrophysics 561 8 2014A&A...561A..45A 10.1051/0004-6361/201322215 1310.6715 119268126 Brian A. Skiff Edward Bowell Bruce W. Koehn Jason J. Sanborn Kyle P. McLelland Brian D. Warner July 2012 Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS) - 2008 May through 2008 December The Minor Planet Bulletin 39 3 111–130 1052-8091 2012MPBu...39..111S Adrian Galad Jozef Vilagi Leonard Kornos Stefan Gajdos July 2009 Relative Photometry of Nine Asteroids from Modra The Minor Planet Bulletin 36 3 116–118 1052-8091 2009MPBu...36..116G Horizons Batch for 2023-12-20 Close Approach JPL Horizons https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272008+EV5%27&START_TIME=%272023-12-20%2006:52%27&STOP_TIME=%272023-12-21%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2720,39%27 https://archive.today/20221026135406/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND='2008+EV5'&START_TIME='2023-12-20%2006:52'&STOP_TIME='2023-12-21'&STEP_SIZE='1%20day'&QUANTITIES='20,39' 2022-10-26 live 2022-10-26 RNG_3sigma = uncertainty range in km. (JPL#107/Soln.date: 2021-Apr-14 generates RNG_3sigma = 1741 km) External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul 341843 341843 2008EV5 341843 341843 (341843) 2008 EV 5 341843 341843 341843 341843 20080304 20231220