2020 UA

{{Short description|Near earth asteroid}} {{Use dmy dates|date=January 2021}} {{Infobox planet | minorplanet = yes | name = 2020 UA | background = #FFC2E0 | image = | image_size = | caption = | discovery_ref = <ref name="MPEC-2020-U52"/><ref name="MPC-object"/> | discoverer = [[Mount Lemmon Survey]] | discovery_site = [[Mount Lemmon Observatory|Mt. Lemmon Obs.]] | discovered = 16 October 2020 | mpc_name = 2020 UA | alt_names = C3K1WP2<ref name="NEO-Exchange"/><ref name="PseudoMPEC"/> | pronounced = | named_after = | mp_category = {{nowrap|[[Near-Earth object|NEO]]{{·}}[[Aten asteroid|Aten]]<ref name="jpldata"/>}} | orbit_ref = <ref name="jpldata"/> | epoch = 31 May 2020 ([[Julian day|JD]] 2459000.5) | uncertainty = 4 | observation_arc = 4 days | aphelion = 1.206 [[Astronomical unit|AU]] | perihelion = 0.7537 AU | time_periastron = 20 January 2020 05:17 UT<ref name="jpldata"/> | semimajor = 0.980 AU | eccentricity = 0.23093 | period = 0.97 yr | mean_anomaly = 133.866[[Degree (angle)|°]] | mean_motion = {{Deg2DMS|1.0158347|sup=ms}} / day | inclination = 2.762° | asc_node = 27.909° | arg_peri = 27.909° | moid = {{cvt|0.000204|AU|km}} | mean_diameter = {{val|5|-|12|ul=m}} {{small|(assumed [[geometric albedo|albedo]] 0.05–0.25)}}<ref name="sizemagnitude"/> | rotation = | albedo = | spectral_type = | magnitude = 20.8 {{small|(at discovery)}}<ref name="MPEC-2020-U52"/> | abs_magnitude = {{val|28.39|0.38}}<ref name="jpldata"/><br/>28.43<ref name="MPC-object"/> }}

'''2020 UA''' is a tiny [[near-Earth asteroid]] around {{convert|5–12|m|ft}} across that passed within {{cvt|46100|km|mi}} of Earth on 21 October 2020 at 02:00 [[Universal Coordinated Time|UT]].<ref name="jpldata"/>

== References == <references>

<ref name="jpldata">{{cite web |type = 2020-10-20 last obs. |title = JPL Small-Body Database Browser: 2020 UA |url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=54073339;cad=1 |publisher = [[Jet Propulsion Laboratory]] |accessdate = 19 January 2021}}</ref>

<ref name="MPC-object">{{cite web |title = 2020 UA |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=2020+UA |work = Minor Planet Center |publisher = International Astronomical Union |accessdate = 19 January 2021}}</ref>

<ref name="NEO-Exchange">{{cite web |title = 2020 UA |url = https://neoexchange.lco.global/target/60765/ |work = NEO Exchange |publisher = [[Las Cumbres Observatory]] |date = 19 October 2020 |accessdate = 19 January 2021}}</ref>

<ref name="PseudoMPEC">{{cite web |title = "Pseudo-MPEC" for C3K1WP2 |url = https://projectpluto.com/neocp2/mpecs/C3K1WP2.htm |first = Bill |last = Gray |publisher = Project Pluto |date = 17 October 2020 |accessdate = 19 January 2021}}</ref>

<ref name="MPEC-2020-U52">{{cite web |title = MPEC 2020-U52 : 2020 UA |url = https://minorplanetcenter.net/mpec/K20/K20U52.html |work = Minor Planet Electronic Circular |publisher = [[Minor Planet Center]] |date = 17 October 2020 |accessdate = 19 January 2021}}</ref>

<ref name="sizemagnitude">{{cite web |title = Conversion of Absolute Magnitude to Diameter for Minor Planets |url = http://www.physics.sfasu.edu/astro/asteroids/sizemagnitude.html |first = Dan |last = Bruton |work = Department of Physics, Engineering, and Astronomy |publisher = Stephen F. Austin State University |accessdate = 19 January 2021 |archive-date = 23 July 2011 |archive-url = https://web.archive.org/web/20110723191750/http://www.physics.sfasu.edu/astro/asteroids/sizemagnitude.html |url-status = dead }}</ref>

</references>

== External links == * [https://www.virtualtelescope.eu/2020/10/18/near-earth-asteroid-2020-ua-very-close-encounter-online-observations-20-oct-2020/ Near-Earth Asteroid 2020 UA extremely close encounter: online observations – 20 Oct. 2020] * {{NeoDys|2020UA}} * {{ESA-SSA|2020UA}} * {{JPL small body|id=54073339}}

{{2020 in space|state=collapsed}} {{Small Solar System bodies}}  {{Portal bar|Astronomy|Outer Space}} {{Authority control}}

{{DEFAULTSORT:2020 UA}} [[Category:Aten asteroids|#]] [[Category:Discoveries by MLS]] [[Category:Minor planet object articles (unnumbered)]] [[Category:Near-Earth objects in 2020|20201021]] [[Category:Astronomical objects discovered in 2020|20201016]]