(164121) 2003 YT1

Asteroid April 2018 yes (164121) 2003 YT 1 #FFC2E0 2003YT1.may4.mos.gif Mosaic of radar images of 2003 YT 1 and its moon by Arecibo Observatory on 4 May 2004 Catalina Sky Srvy. Catalina Stn. 18 December 2003 (164121) 2003 YT 1 ApolloNEOPHA 23 March 2018 (JD 2458200.5) 0 35.41 yr (12,934 d) 1.4335 AU 0.7857 AU 1.1096 AU 0.2919 1.17 yr (427 d) 11.417° 0.8433 ms / day 44.064° 38.335° 91.042° 0.0027 AU (1.0519 LD) 1 (D: 210 m; P: 30 h) 1.0 km1.100 0.088 km1.561 0.202 km1.717 0.550 km 2.34 h2.343 h2.343 h3.0025 0.0001 h 0.198 0.1530.240 0.0670.36 0.200.486 0.0400.4861 0.03950.5848 (derived) V 16.216.20 0.3 (164121) 2003 YT 1 is a bright asteroid and synchronous binary system on a highly eccentric orbit, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 2 km mi off 2 us in diameter. It was discovered on 18 December 2003, by astronomers with the Catalina Sky Survey at the Catalina Station near Tucson, Arizona, in the United States. The V-type asteroid has a short rotation period of 2.3 hours. Its 210-meter sized minor-planet moon was discovered at Arecibo Observatory in May 2004. Orbit and classification 2003 YT 1 is a member of the Earth-crossing group of Apollo asteroids, the largest group of near-Earth objects with approximately 10 thousand known members. It orbits the Sun at a distance of 0.8–1.4 AU once every 1 years and 2 months (427 days; semi-major axis of 1.11 AU). Its orbit has an eccentricity of 0.29 and an inclination of 44° with respect to the ecliptic. The body's observation arc begins with a precovery taken at the Siding Spring Observatory in November 1989, more than 14 years prior to its official discovery observation at Catalina. Close approaches and Torino rating The asteroid has an Earth minimum orbital intersection distance of 0.0027 AU km mi on off 3, which corresponds to 1.05 lunar distances and makes it a potentially hazardous asteroid due to its sufficiently large size. On the Torino Scale, this object was rated level 1 on 27 December 2003 with an observation arc of 8.7 days. It was removed from the risk table on 29 December 2003. Over the next ten million years the asteroid has a 6% chance of impacting Earth. On 30 April 2004 it made a close approach at a nominal distance of 0.073 AU LD on, and on 31 October 2016, it passed Earth at 0.035 AU LD on. The asteroid's closest encounter with Earth will be on 29 April 2073, when it is projected to pass at 0.0113 AU LD on only (see table). 2003 YT 1 has unique orbital characteristics among minor planets. It is the only known binary asteroid to have an Earth MOID within the Moon's Apogee.NASA.gov +Earth Approach on 3 November 2023 Date JPL Horizonsnominal geocentricdistance (AU) uncertaintyregion(3-sigma)2023-Nov-03 12:33 0.05936 AU e6km unit on ±18 km Meteor stream On 28 April 2017, a 2.7 cm 1 fragment of 2013 YT 1 is suspected of having impacted Earth creating a fireball over Kyoto, Japan. The fragment would have broken off the parent body within the last ten thousand years. Physical characteristics thumb|left|Animation of Arecibo radar images showing 2003 YT 1's rotation and its satellite's orbital motion on 3 May 2004 This object has been characterized as a bright Vestian-like V-type asteroid. Rotation period Several rotational lightcurve of this asteroid have been obtained from photometric observations (U=2/n.a./3/3). Analysis of the best-rated lightcurve gave a short rotation period of 2.343 hours with a brightness amplitude between 0.16 and 0.27 magnitude. Diameter and albedo According to radar observations with the Arecibo Observatory and the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, this asteroid measures between 1.0 and 1.717 kilometers in diameter and its surface has an albedo between 0.198 and 0.4861. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.5848 and adopts a diameter of 1.0 kilometer based on an absolute magnitude of 16.2. Satellite The Arecibo radar observations in May 2004 revealed that 2003 YT 1 is a synchronous binary asteroid. Follow-up observations confirmed a 210-meter sized minor-planet moon orbiting its primary every 30 hours at a distance of 2.7 km. Numbering and naming This minor planet was numbered by the Minor Planet Center on 26 September 2007 (M.P.C. 60686). As of 2018, it has not been named. References 30em 2018-04-18 last obs. JPL Small-Body Database Browser: 164121 (2003 YT1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2164121 Jet Propulsion Laboratory 20 April 2018 164121 (2003 YT1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=164121 20 April 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 20 April 2018 Asteroids and comets rotation curves – (164121) Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page5cou.html#0g4121 21 April 2018 https://web.archive.org/web/20181111134209/http://obswww.unige.ch/~behrend/page5cou.html#0g4121 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 Asteroids with Satellites Database – (164121) 2003 YT1 Johnston's Archive 20 September 2014 Johnston, Wm. Robert http://www.johnstonsarchive.net/astro/astmoons/am-164121.html 20 April 2018 2003-12-27 Major News about Minor Objects (2003 YT1) hohmanntransfer http://www.hohmanntransfer.com/mn/0312/27.htm#risks 20 April 2018 25 April 2013 https://web.archive.org/web/20130425080914/http://www.hohmanntransfer.com/mn/0312/27.htm#risks dead NEOs Removed from Impact Risks Tables Near Earth Object Program NASA http://neo.jpl.nasa.gov/risk/removed.html https://web.archive.org/web/20020602101400/http://neo.jpl.nasa.gov/risk/removed.html dead 2 June 2002 20 April 2018 164121 20 April 2018 M. C. Nolan E. S. Howell Ellen Howell A. A. Hine May 2004 2003 YT_1 IAU Circ. 8336 3 2004IAUC.8336....3N Marco Delbo Kevin Walsh Michael Mueller Alan W. Harris Ellen S. Howell Ellen Howell March 2011 The cool surfaces of binary near-Earth asteroids Icarus 212 1 138–148 2011Icar..212..138D 10.1016/j.icarus.2010.12.011 122586509 https://hal.archives-ouvertes.fr/hal-00725402/file/PEER_stage2_10.1016%252Fj.icarus.2010.12.011.pdf 6 A. Mainzer T. Grav J. Masiero J. Bauer R. M. Cutri R. S. McMillan C. R. Nugent D. Tholen R. Walker E. L. Wright November 2012 Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey The Astrophysical Journal Letters 760 1 6 2012ApJ...760L..12M 10.1088/2041-8205/760/1/L12 1210.0502 41459166 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 S. M. Larson A. D. Grauer E. Beshore E. Christensen P. Pravec M. Kaasalainen M. C. Nolan E. S. Howell Ellen Howell A. A. Hine A. Galad B. S. Gajdos C. L. Kornos D. J. Vilagi November 2004 Physical Characteristics of the Binary PHA 2003 YT1 American Astronomical Society 36 1139 2004DPS....36.3207L 6 P. Pravec P. Scheirich P. Kusnirák L. Sarounová S. Mottola G. Hahn P. Brown G. Esquerdo N. Kaiser Z. Krzeminski D. P. Pray B. D. Warner A. W. Harris M. C. Nolan E. S. Howell Ellen Howell L. A. M. Benner J.-L. Margot A. Galád W. Holliday M. D. Hicks Yu. N. Krugly D. Tholen R. Whiteley F. Marchis D. R. DeGraff A. Grauer S. Larson F. P. Velichko W. R. Cooney R. Stephens J. Zhu K. Kirsch R. Dyvig L. Snyder V. Reddy S. Moore S. Gajdos J. Világi G. Masi D. Higgins G. Funkhouser B. Knight S. Slivan R. Behrend M. Grenon G. Burki R. Roy C. Demeautis D. Matter N. Waelchli Y. Revaz A. Klotz M. Rieugné P. Thierry V. Cotrez L. Brunetto G. Kober March 2006 Photometric survey of binary near-Earth asteroids Icarus 181 1 63–93 2006Icar..181...63P 10.1016/j.icarus.2005.10.014 Cristina A. Thomas Joshua P. Emery David E. Trilling Marco Delbó Joseph L. Hora Michael Mueller January 2014 Physical characterization of Warm Spitzer-observed near-Earth objects Icarus 228 217–246 2014Icar..228..217T 10.1016/j.icarus.2013.10.004 1310.2000 119278697 Juan A. Sanchez René Michelsen Vishnu Reddy Andreas Nathues July 2013 Surface composition and taxonomic classification of a group of near-Earth and Mars-crossing asteroids Icarus 225 1 131–140 2013Icar..225..131S 10.1016/j.icarus.2013.02.036 1302.4449 119207812 Kasuga Toshihiro Sato Mikiya Ueda Masayoshi A Fireball and Potentially Hazardous Binary Near-Earth Asteroid (164121) 2003 YT1 The Astronomical Journal 2020 159 2 47 10.3847/1538-3881/ab4e1b 1910.06527 2020AJ....159...47K 204576074 free Horizons Batch for 2023-11-03 Close Approach JPL Horizons https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272003+YT1%27&START_TIME=%272023-11-03%2012:33%27&STOP_TIME=%272023-11-04%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2720,39%27 https://web.archive.org/web/20221029143216/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272003+YT1%27&START_TIME=%272023-11-03%2012:33%27&STOP_TIME=%272023-11-04%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2720,39%27 2022-10-29 live 2022-10-29 RNG_3sigma = uncertainty range in km. (JPL#162/Soln.date: 2022-Oct-10 generates RNG_3sigma = 18 km) External links 2003 YT1, IAUC 8336, 6 May 2004 List of the Potentially Hazardous Asteroids (PHAs), Minor Planet Center Asteroids with Satellites, Robert Johnston, johnstonsarchive.net PHA Close Approaches To The Earth, Minor Planet Center 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 Behrend 164121 164121 2003YT1 2164121 164121 (164121) 2003 YT 1 164121 164121 164121 164121 20031218 20161031 20231103