{{Short description|Asteroid}} {{Use dmy dates|date=April 2018}} {{Infobox planet | minorplanet = yes | name = {{mp|(164121) 2003 YT|1}} | background = #FFC2E0 | image = 2003YT1.may4.mos.gif | image_scale = | caption = Mosaic of radar images of {{mp|2003 YT|1}} and its moon by [[Arecibo Observatory]] on 4 May 2004 | discovery_ref = <ref name="MPC-object" /> | discoverer = [[Catalina Sky Survey|Catalina Sky Srvy.]] | discovery_site = [[Catalina Station|Catalina Stn.]] | discovered = 18 December 2003 | mpc_name = (164121) {{mp|2003 YT|1}} | alt_names = | pronounced = | named_after = <!-- use upon naming [[xafter]]<br />{{small|()}}<ref name="MPC-object" />--> | mp_category = {{nowrap|[[Apollo asteroid|Apollo]]{{·}}[[Near-Earth object|NEO]]{{·}}[[Potentially hazardous object|PHA]]<ref name="MPC-object" /><ref name="jpldata" />}} | orbit_ref = <ref name="jpldata" /> | epoch = 23 March 2018 ([[Julian day|JD]] 2458200.5) | uncertainty = 0 | observation_arc = 35.41 [[Julian year (astronomy)|yr]] (12,934 d) | aphelion = 1.4335 [[Astronomical unit|AU]] | perihelion = 0.7857 AU | semimajor = 1.1096 AU | eccentricity = 0.2919 | period = 1.17 yr (427 d) | mean_anomaly = 11.417[[Degree (angle)|°]] | mean_motion = {{Deg2DMS|0.8433|sup=ms}} / day | inclination = 44.064° | asc_node = 38.335° | arg_peri = 91.042° | moid = 0.0027 AU (1.0519 [[Lunar distance (astronomy)|LD]]) | satellites = 1 {{small|([[Diameter|D]]: 210 m; [[Orbital period|P]]: 30 h)}}<ref name="Nolan-2004" /><ref name="johnstonsarchive" /> | mean_diameter = {{val|1.0|ul=km}}<ref name="Nolan-2004" /><br />{{val|1.100|0.088|u=km}}<ref name="WISE" /><br />{{val|1.561|0.202|u=km}}<ref name="Delbo-2011" /><br />{{val|1.717|0.550|u=km}}<ref name="Mainzer-2012" /> | rotation = {{val|2.34|ul=h}}<ref name="Larson-2004" /><br />{{val|2.343|u=h}}<ref name="Nolan-2004" /><br />{{val|2.343|u=h}}<ref name="Pravec-2006" /><br />{{val|3.0025|0.0001|u=h}}<ref name="geneva-obs" /> | albedo = {{val|0.198|0.153}}<ref name="Mainzer-2012" /><br />{{val|0.240|0.067}}<ref name="Delbo-2011" /><br />{{val|0.36|0.20}}<ref name="Mainzer-2011" /><br />{{val|0.486|0.040}}<ref name="Mainzer-2011" /><br />{{val|0.4861|0.0395}}<ref name="WISE" /><br />{{val|0.5848}} {{small|(derived)}}<ref name="lcdb" /> | spectral_type = [[V-type asteroid|V]]<ref name="lcdb" /><ref name="Sanchez-2013" /><ref name="Thomas-2014" /> | abs_magnitude = 16.2<ref name="jpldata" /><ref name="WISE" /><ref name="lcdb" /><br />{{val|16.20|0.3}}<ref name="Mainzer-2012" /> }} {{DISPLAYTITLE:{{mp|(164121) 2003 YT|1}}}} '''{{mp|(164121) 2003 YT|1}}''' is a bright [[asteroid]] and synchronous [[Binary asteroid|binary system]] on a highly eccentric orbit, classified as a [[near-Earth object]] and [[potentially hazardous asteroid]] of the [[Apollo asteroid|Apollo group]], approximately {{convert|2|km|mi|abbr=off|sigfig=2|sp=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.<ref name="MPC-object" /> The [[V-type asteroid]] has a short [[rotation period]] of 2.3 hours.<ref name="lcdb" /> Its 210-meter sized [[minor-planet moon]] was discovered at [[Arecibo Observatory]] in May 2004.<ref name="Nolan-2004" /><ref name="johnstonsarchive" />
== Orbit and classification ==
{{mp|2003 YT|1}} is a member of the [[Earth-crossing asteroid|Earth-crossing]] group of [[Apollo asteroid]]s, the largest group of [[near-Earth object]]s with approximately 10 thousand known members.<ref name="MPC-object" /><ref name="jpldata" />
It orbits the Sun at a distance of 0.8–1.4 [[Astronomical unit|AU]] once every 1 years and 2 months (427 days; [[semi-major axis]] of 1.11 AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.29 and an [[orbital inclination|inclination]] of 44[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> 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.<ref name="MPC-object" />
=== Close approaches and Torino rating ===
The asteroid has an Earth [[minimum orbital intersection distance]] of {{convert |0.0027 |AU |km mi |abbr=on |lk=off |sigfig=3}}, which corresponds to 1.05 [[Lunar distance (astronomy)|lunar distances]] and makes it a [[potentially hazardous asteroid]] due to its sufficiently large size.<ref name="jpldata" /> On the [[Torino Scale]], this object was rated level 1 on 27 December 2003 with an observation arc of 8.7 days.<ref name="hohmanntransfer" /> It was removed from the risk table on 29 December 2003.<ref name="removed"/> Over the next ten million years the asteroid has a 6% chance of impacting Earth.<ref name=Sasuga2019/>
On 30 April 2004 it made a close approach at a nominal distance of {{convert|0.073|AU|LD|abbr=on}}, and on 31 October 2016, it passed Earth at {{convert|0.035|AU|LD|abbr=on}}. The asteroid's closest encounter with Earth will be on 29 April 2073, when it is projected to pass at {{convert|0.0113|AU|LD|abbr=on}} only ''(see table)''.<ref name="jpldata" />
{{mp|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.<ref>[https://ssd.jpl.nasa.gov/sbdb_query.cgi#x NASA.gov]</ref>
{| class="wikitable" style="font-size: 0.9em;" |+Earth Approach on 3 November 2023<ref name=jpldata/> ! Date ! [[JPL Horizons]]<br />[[Curve fitting|nominal]] geocentric<br />distance ([[astronomical unit|AU]]) ! uncertainty<br />region<br />([[3-sigma]]) |- |2023-Nov-03 12:33 ||{{Convert|0.05936|AU|e6km|abbr=unit|lk=on}}<ref name="jpldata"/> || ±{{val|18|u=km}}<ref name="CA2023"/> |}
{{Large near earth asteroid flybys 5LD}}
== Meteor stream == On 28 April 2017, a {{cvt|2.7|cm|sigfig=1}} fragment of {{mp|2013 YT|1}} is suspected of having [[Impact event|impacted]] Earth creating a [[Meteoroid#Fireball|fireball]] over Kyoto, Japan.<ref name=Sasuga2019/> The fragment would have broken off the parent body within the last ten thousand years.
== Physical characteristics == [[File:2003 YT1 may3s Arecibo.gif|thumb|left|Animation of Arecibo radar images showing {{mp|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]].<ref name="lcdb" /><ref name="Thomas-2014" /><ref name="Sanchez-2013" />
=== Rotation period ===
Several rotational [[lightcurve]] of this asteroid have been obtained from [[Photometry (astronomy)|photometric]] observations ({{small|[[LCDB quality code|U=2/n.a./3/3]]}}).<ref name="Larson-2004" /><ref name="Nolan-2004" /><ref name="Pravec-2006" /><ref name="geneva-obs" /> 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 (astronomy)|magnitude]].<ref name="lcdb" />
=== 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 [[astronomical albedo|albedo]] between 0.198 and 0.4861.<ref name="Nolan-2004" /><ref name="WISE" /><ref name="Delbo-2011" /><ref name="Mainzer-2012" /><ref name="Mainzer-2011" />
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.<ref name="lcdb" />
=== Satellite === The Arecibo radar observations in May 2004 revealed that {{mp|2003 YT|1}} is a synchronous [[binary asteroid]].<ref name="Nolan-2004" /> Follow-up observations confirmed a 210-meter sized [[minor-planet moon]] orbiting its primary every 30 hours at a distance of 2.7 km.<ref name="johnstonsarchive" /><ref name="Pravec-2006" />
== Numbering and naming ==
This [[minor planet]] was [[Minor planet designation|numbered]] by the [[Minor Planet Center]] on 26 September 2007 ({{small|[[Minor Planet Circulars|M.P.C.]] 60686}}).<ref name="MPC-Circulars-Archive" /> As of 2018, it has not been [[List of named minor planets (alphabetical)|named]].<ref name="MPC-object" />
== References == {{reflist|30em|refs=
<ref name="jpldata">{{cite web |type = 2018-04-18 last obs. |title = JPL Small-Body Database Browser: 164121 (2003 YT1) |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2164121 |publisher = [[Jet Propulsion Laboratory]] |accessdate = 20 April 2018}}</ref>
<ref name="MPC-object">{{cite web |title = 164121 (2003 YT1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=164121 |accessdate = 20 April 2018}}</ref>
<ref name="MPC-Circulars-Archive">{{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 20 April 2018}}</ref>
<ref name="geneva-obs">{{cite web |title = Asteroids and comets rotation curves – (164121) |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page5cou.html#0g4121 |accessdate = 21 April 2018}}</ref>
<ref name="Mainzer-2011">{{cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Bauer |first4 = J. |last4 = Masiero |first5 = R. S. |last5 = McMillan |first6 = R. M. |last6 = Cutri |first7 = R. |last7 = Walker |first8 = E. |last8 = Wright |first9 = P. |last9 = Eisenhardt |first10 = D. J. |last10 = Tholen |first11 = T. |last11 = Spahr |first12 = R. |last12 = Jedicke |first13 = L. |last13 = Denneau |first14 = E. |last14 = DeBaun |first15 = D. |last15 = Elsbury |first16 = T. |last16 = Gautier |first17 = S. |last17 = Gomillion |first18 = E. |last18 = Hand |first19 = W. |last19 = Mo |first20 = J. |last20 = Watkins |first21 = A. |last21 = Wilkins |first22 = G. L. |last22 = Bryngelson |first23 = A. |last23 = Del Pino Molina |first24 = S. |last24 = Desai |first25 = M. |last25 = Gómez Camus |first26 = S. L. |last26 = Hidalgo |first27 = I. |last27 = Konstantopoulos |first28 = J. A. |last28 = Larsen |first29 = C. |last29 = Maleszewski |first30 = M. A. |last30 = Malkan |first31 = J.-C. |last31 = Mauduit |first32 = B. L. |last32 = Mullan |first33 = E. W. |last33 = Olszewski |first34 = J. |last34 = Pforr |first35 = A. |last35 = Saro |first36 = J. V. |last36 = Scotti |first37 = L. H. |last37 = Wasserman |date = December 2011 |title = NEOWISE Observations of Near-Earth Objects: Preliminary Results |journal = The Astrophysical Journal |volume = 743 |issue = 2 |page = 17 |bibcode = 2011ApJ...743..156M |doi = 10.1088/0004-637X/743/2/156 |arxiv = 1109.6400|s2cid = 239991 }}</ref>
<ref name="johnstonsarchive">{{cite web |title = Asteroids with Satellites Database – (164121) 2003 YT1 |work = Johnston's Archive |date = 20 September 2014 |author = Johnston, Wm. Robert |url = http://www.johnstonsarchive.net/astro/astmoons/am-164121.html |access-date= 20 April 2018}}</ref>
<ref name="hohmanntransfer">{{cite web |date = 2003-12-27 |title = Major News about Minor Objects (2003 YT1) |publisher = hohmanntransfer |url = http://www.hohmanntransfer.com/mn/0312/27.htm#risks |access-date= 20 April 2018}}</ref>
<ref name="removed">{{cite web |title = NEOs Removed from Impact Risks Tables |work = Near Earth Object Program |publisher = NASA |url = http://neo.jpl.nasa.gov/risk/removed.html |archive-url = https://web.archive.org/web/20020602101400/http://neo.jpl.nasa.gov/risk/removed.html |url-status = dead |archive-date = 2 June 2002 |accessdate = 20 April 2018}}</ref>
<ref name="lcdb">{{cite LCDB|number = 164121 |accessdate = 20 April 2018}}</ref>
<ref name="Nolan-2004">{{Cite journal |first1 = M. C. |last1 = Nolan |first2 = E. S. |last2 = Howell|author2-link=Ellen Howell |first3 = A. A. |last3 = Hine |date = May 2004 |title = 2003 YT_1 |journal = IAU Circ. |volume = 8336 |issue = 8336 |pages = 3 |bibcode = 2004IAUC.8336....3N}}</ref>
<ref name="Delbo-2011">{{Cite journal |first1 = Marco |last1 = Delbo |first2 = Kevin |last2 = Walsh |first3 = Michael |last3 = Mueller |first4 = Alan W. |last4 = Harris |first5 = Ellen S. |last5 = Howell|author5-link=Ellen Howell |date = March 2011 |title = The cool surfaces of binary near-Earth asteroids |journal = Icarus |volume = 212 |issue = 1 |pages = 138–148 |bibcode = 2011Icar..212..138D |doi = 10.1016/j.icarus.2010.12.011 |s2cid = 122586509 |url = https://hal.archives-ouvertes.fr/hal-00725402/file/PEER_stage2_10.1016%252Fj.icarus.2010.12.011.pdf}}</ref>
<ref name="Mainzer-2012">{{Cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = J. |last4 = Bauer |first5 = R. M. |last5 = Cutri |first6 = R. S. |last6 = McMillan |first7 = C. R. |last7 = Nugent |first8 = D. |last8 = Tholen |first9 = R. |last9 = Walker |first10 = E. L. |last10 = Wright |date = November 2012 |title = Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey |journal = The Astrophysical Journal Letters |volume = 760 |issue = 1 |page = 6 |bibcode = 2012ApJ...760L..12M |doi = 10.1088/2041-8205/760/1/L12 |arxiv = 1210.0502|s2cid = 41459166 }}</ref>
<ref name="WISE">{{cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = E. |last4 = Hand |first5 = J. |last5 = Bauer |first6 = D. |last6 = Tholen |first7 = R. S. |last7 = McMillan |first8 = T. |last8 = Spahr |first9 = R. M. |last9 = Cutri |first10 = E. |last10 = Wright |first11 = J. |last11 = Watkins |first12 = W. |last12 = Mo |first13 = C. |last13 = Maleszewski |date = November 2011 |title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 25 |bibcode = 2011ApJ...741...90M |doi = 10.1088/0004-637X/741/2/90 |arxiv = 1109.6407|s2cid = 118700974 }}</ref>
<ref name="Larson-2004">{{Cite journal |display-authors = 6 |first1 = S. M. |last1 = Larson |first2 = A. D. |last2 = Grauer |first3 = E. |last3 = Beshore |first4 = E. |last4 = Christensen |first5 = P. |last5 = Pravec |first6 = M. |last6 = Kaasalainen |first7 = M. C. |last7 = Nolan |first8 = E. S. |last8 = Howell|author8-link=Ellen Howell |first9 = A. A. |last9 = Hine |first10 = A. |last10 = Galad |first11 = B. S. |last11 = Gajdos |first12 = C. L. |last12 = Kornos |first13 = D. J. |last13 = Vilagi |date = November 2004 |title = Physical Characteristics of the Binary PHA 2003 YT1 |journal = American Astronomical Society |volume = 36 |page = 1139 |bibcode = 2004DPS....36.3207L}}</ref>
<ref name="Pravec-2006">{{Cite journal |display-authors = 6 |first1 = P. |last1 = Pravec |first2 = P. |last2 = Scheirich |first3 = P. |last3 = Kusnirák |first4 = L. |last4 = Sarounová |first5 = S. |last5 = Mottola |first6 = G. |last6 = Hahn |first7 = P. |last7 = Brown |first8 = G. |last8 = Esquerdo |first9 = N. |last9 = Kaiser |first10 = Z. |last10 = Krzeminski |first11 = D. P. |last11 = Pray |first12 = B. D. |last12 = Warner |first13 = A. W. |last13 = Harris |first14 = M. C. |last14 = Nolan |first15 = E. S. |last15 = Howell|author15-link=Ellen Howell |first16 = L. A. M. |last16 = Benner |first17 = J.-L. |last17 = Margot |first18 = A. |last18 = Galád |first19 = W. |last19 = Holliday |first20 = M. D. |last20 = Hicks |first21 = Yu. N. |last21 = Krugly |first22 = D. |last22 = Tholen |first23 = R. |last23 = Whiteley |first24 = F. |last24 = Marchis |first25 = D. R. |last25 = DeGraff |first26 = A. |last26 = Grauer |first27 = S. |last27 = Larson |first28 = F. P. |last28 = Velichko |first29 = W. R. |last29 = Cooney |first30 = R. |last30 = Stephens |first31 = J. |last31 = Zhu |first32 = K. |last32 = Kirsch |first33 = R. |last33 = Dyvig |first34 = L. |last34 = Snyder |first35 = V. |last35 = Reddy |first36 = S. |last36 = Moore |first37 = S. |last37 = Gajdos |first38 = J. |last38 = Világi |first39 = G. |last39 = Masi |first40 = D. |last40 = Higgins |first41 = G. |last41 = Funkhouser |first42 = B. |last42 = Knight |first43 = S. |last43 = Slivan |first44 = R. |last44 = Behrend |first45 = M. |last45 = Grenon |first46 = G. |last46 = Burki |first47 = R. |last47 = Roy |first48 = C. |last48 = Demeautis |first49 = D. |last49 = Matter |first50 = N. |last50 = Waelchli |first51 = Y. |last51 = Revaz |first52 = A. |last52 = Klotz |first53 = M. |last53 = Rieugné |first54 = P. |last54 = Thierry |first55 = V. |last55 = Cotrez |first56 = L. |last56 = Brunetto |first57 = G. |last57 = Kober |date = March 2006 |title = Photometric survey of binary near-Earth asteroids |journal = Icarus |volume = 181 |issue = 1 |pages = 63–93 |bibcode = 2006Icar..181...63P |doi = 10.1016/j.icarus.2005.10.014}}</ref>
<ref name="Thomas-2014">{{Cite journal |first1 = Cristina A. |last1 = Thomas |first2 = Joshua P. |last2 = Emery |first3 = David E. |last3 = Trilling |first4 = Marco |last4 = Delbó |first5 = Joseph L. |last5 = Hora |first6 = Michael |last6 = Mueller |date = January 2014 |title = Physical characterization of Warm Spitzer-observed near-Earth objects |journal = Icarus |volume = 228 |pages = 217–246 |bibcode = 2014Icar..228..217T |doi = 10.1016/j.icarus.2013.10.004 |arxiv = 1310.2000|s2cid = 119278697 }}</ref>
<ref name="Sanchez-2013">{{Cite journal |first1 = Juan A. |last1 = Sanchez |first2 = René |last2 = Michelsen |first3 = Vishnu |last3 = Reddy |first4 = Andreas |last4 = Nathues |date = July 2013 |title = Surface composition and taxonomic classification of a group of near-Earth and Mars-crossing asteroids |journal = Icarus |volume = 225 |issue = 1 |pages = 131–140 |bibcode = 2013Icar..225..131S |doi = 10.1016/j.icarus.2013.02.036 |arxiv = 1302.4449|s2cid = 119207812 }}</ref>
<ref name=Sasuga2019>{{cite journal |last1=Kasuga |first1=Toshihiro |last2=Sato |first2=Mikiya |last3=Ueda |first3=Masayoshi |title=A Fireball and Potentially Hazardous Binary Near-Earth Asteroid (164121) 2003 YT1 |journal=The Astronomical Journal |year=2020 |volume=159 |issue=2 |page=47 |doi=10.3847/1538-3881/ab4e1b |arxiv=1910.06527|bibcode=2020AJ....159...47K |s2cid=204576074 |doi-access=free }}</ref>
<ref name="CA2023">{{cite web |title=Horizons Batch for 2023-11-03 Close Approach |publisher=[[JPL Horizons On-Line Ephemeris System|JPL Horizons]] |url=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 |archive-url=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 |archive-date=2022-10-29 |url-status=live |accessdate=2022-10-29}} RNG_3sigma = uncertainty range in km. (JPL#162/Soln.date: 2022-Oct-10 generates RNG_3sigma = {{val|18|u=km}})</ref>
}} <!-- end of reflist -->
== External links == * [http://www.cbat.eps.harvard.edu/iauc/08300/08336.html#Item3 2003 YT1], IAUC 8336, 6 May 2004 * [https://www.minorplanetcenter.net/iau/lists/t_phas.html List of the Potentially Hazardous Asteroids (PHAs)], ''Minor Planet Center'' * [http://www.johnstonsarchive.net/astro/asteroidmoons.html Asteroids with Satellites], Robert Johnston, johnstonsarchive.net * [https://www.minorplanetcenter.net/iau/lists/PHACloseApp.html PHA Close Approaches To The Earth], ''Minor Planet Center'' * [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }}) * [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend * {{NeoDys|164121}} * {{ESA-SSA|164121|2003YT1}} * {{JPL small body|id=2164121}}
{{Minor planets navigator | |number=164121 |PageName={{mp|(164121) 2003 YT|1}} | }} {{Small Solar System bodies}} {{2023 in space}} {{Authority control}}
{{DEFAULTSORT:2003 YT1}} [[Category:Apollo asteroids|164121]] [[Category:Discoveries by the Catalina Sky Survey|164121]] [[Category:Binary asteroids|164121]] [[Category:Potentially hazardous asteroids|164121]] [[Category:Astronomical objects discovered in 2003|20031218]] [[Category:Near-Earth objects in 2016|20161031]] [[Category:Near-Earth objects in 2023|20231103]]