# 2020 UA

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Near earth asteroid

2020 UA Discovery[1][2] Discovered by Mount Lemmon Survey Discovery site Mt. Lemmon Obs. Discovery date 16 October 2020 Designations Alternative designations C3K1WP2[3][4] Minor planet category NEO · Aten[5] Orbital characteristics[5] Epoch 31 May 2020 (JD 2459000.5) Uncertainty parameter 4 Observation arc 4 days Aphelion 1.206 AU Perihelion 0.7537 AU Semi-major axis 0.980 AU Eccentricity 0.23093 Orbital period (sidereal) 0.97 yr Mean anomaly 133.866° Mean motion 1° 0m 57.005s / day Inclination 2.762° Longitude of ascending node 27.909° Time of perihelion 20 January 2020 05:17 UT[5] Argument of perihelion 27.909° Earth MOID 0.000204 AU (30,500 km) Physical characteristics Mean diameter 5–12 m (assumed albedo 0.05–0.25)[6] Apparent magnitude 20.8 (at discovery)[1] Absolute magnitude (H) 28.39±0.38[5] 28.43[2]

**2020 UA** is a tiny [near-Earth asteroid](/source/Near-Earth_asteroid) around 5–12 metres (16–39 ft) across that passed within 46,100 km (28,600 mi) of Earth on 21 October 2020 at 02:00 [UT](/source/Universal_Coordinated_Time).[5]

## References

1. ^ [***a***](#cite_ref-MPEC-2020-U52_1-0) [***b***](#cite_ref-MPEC-2020-U52_1-1) ["MPEC 2020-U52 : 2020 UA"](https://minorplanetcenter.net/mpec/K20/K20U52.html). *Minor Planet Electronic Circular*. [Minor Planet Center](/source/Minor_Planet_Center). 17 October 2020. Retrieved 19 January 2021.

1. ^ [***a***](#cite_ref-MPC-object_2-0) [***b***](#cite_ref-MPC-object_2-1) ["2020 UA"](http://www.minorplanetcenter.net/db_search/show_object?object_id=2020+UA). *Minor Planet Center*. International Astronomical Union. Retrieved 19 January 2021.

1. **[^](#cite_ref-NEO-Exchange_3-0)** ["2020 UA"](https://neoexchange.lco.global/target/60765/). *NEO Exchange*. [Las Cumbres Observatory](/source/Las_Cumbres_Observatory). 19 October 2020. Retrieved 19 January 2021.

1. **[^](#cite_ref-PseudoMPEC_4-0)** Gray, Bill (17 October 2020). [""Pseudo-MPEC" for C3K1WP2"](https://projectpluto.com/neocp2/mpecs/C3K1WP2.htm). Project Pluto. Retrieved 19 January 2021.

1. ^ [***a***](#cite_ref-jpldata_5-0) [***b***](#cite_ref-jpldata_5-1) [***c***](#cite_ref-jpldata_5-2) [***d***](#cite_ref-jpldata_5-3) [***e***](#cite_ref-jpldata_5-4) ["JPL Small-Body Database Browser: 2020 UA"](https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=54073339;cad=1) (2020-10-20 last obs.). [Jet Propulsion Laboratory](/source/Jet_Propulsion_Laboratory). Retrieved 19 January 2021.

1. **[^](#cite_ref-sizemagnitude_6-0)** Bruton, Dan. ["Conversion of Absolute Magnitude to Diameter for Minor Planets"](https://web.archive.org/web/20110723191750/http://www.physics.sfasu.edu/astro/asteroids/sizemagnitude.html). *Department of Physics, Engineering, and Astronomy*. Stephen F. Austin State University. Archived from [the original](http://www.physics.sfasu.edu/astro/asteroids/sizemagnitude.html) on 23 July 2011. Retrieved 19 January 2021.

## External links

- [Near-Earth Asteroid 2020 UA extremely close encounter: online observations – 20 Oct. 2020](https://www.virtualtelescope.eu/2020/10/18/near-earth-asteroid-2020-ua-very-close-encounter-online-observations-20-oct-2020/)

- [2020 UA](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.0) at *NeoDyS-2, Near Earth Objects—Dynamic Site* - [Ephemerides](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.3.0) **·** [Observation prediction](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.4.0) **·** [Orbital info](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.1) **·** [MOID](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.5) **·** [Proper elements](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.6) **·** [Observational info](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.7.0) **·** [Close approaches](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.8) **·** [Physical info](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.9) **·** [Orbit animation](https://newton.spacedys.com/neodys/index.php?n=2020UA&pc=1.1.A)

- [2020 UA](https://neo.ssa.esa.int/search-for-asteroids?sum=1&des=2020UA) at *ESA–[space situational awareness](/source/Space_Situational_Awareness_Programme)* - [Ephemerides](https://neo.ssa.esa.int/search-for-asteroids?des=2020UA&tab=eph) **·** [Observations](https://neo.ssa.esa.int/search-for-asteroids?des=2020UA&tab=obs) **·** [Orbit](https://neo.ssa.esa.int/search-for-asteroids?des=2020UA&tab=orbprop) **·** [Physical properties](https://neo.ssa.esa.int/search-for-asteroids?des=2020UA&tab=physprops) **·** [Summary](https://neo.ssa.esa.int/search-for-asteroids?des=2020UA&tab=summary)

- [2020 UA](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=54073339) at the *[JPL Small-Body Database](/source/JPL_Small-Body_Database)* - [Close approach](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=54073339&view=C) **·** [Discovery](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=54073339&view=D) **·** [Ephemeris](https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=54073339) **·** [Orbit viewer](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=54073339&view=V) **·** [Orbit parameters](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=54073339&view=O) **·** [Physical parameters](https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=54073339&view=P)

v t e 2020 in space « 2019 2021 » Space probe launches Solar Orbiter (Feb 2020) Hope (Jul 2020) Tianwen-1 (Jul 2020) Mars 2020 (Jul 2020) Perseverance rover Mars Helicopter Ingenuity Chang'e 5 (lunar sample return mission; Nov 2020) Impact events 2020 China bolide Selected NEOs Asteroid close approaches 594913 ꞌAylóꞌchaxnim (809875) 2020 BX12 2020 CW 2020 CD3 (temporary satellite) (52768) 1998 OR2 2020 HS7 2020 JJ 2020 LD (163348) 2002 NN4 2020 OY4 2020 QG 2011 ES4 2018 VP1 2020 SO (space debris) 2020 SW 2020 SL1 2020 UA 2020 VV 2020 VT4 (153201) 2000 WO107 (501647) 2014 SD224 (614689) 2020 XL5 Exoplanets AU Mic b Gliese 414 Ab Ac Gliese 433 b c d GJ 1151 b radio emissions K2-315b Kepler-1649c KOI-456.04 Lacaille 9352 b c M51-ULS-1b OGLE-2016-BLG-1928L (rogue planet) Tau Ceti j (predicted) TOI-561 b c d e TOI-700 b c d TOI-732 b c TOI-1338 b TOI-1339 b c d TYC 8998-760-1 c WD 1856+534 b Discoveries Betelgeuse dimming FRB 180916 location and periodicity Radcliffe wave Ophiuchus Supercluster explosion PSO J03094+27 (distant blazar) 2MASS J1047+21 wind speed measurements SGR 1935+2154 (soft gamma ray repeater) HR 6819 black hole hypothesis PHL 293B ending of P Cygni profile hydrogen emission lines Swift J1818.0–1607 (young magnetar) GW190814 (announced) South Pole Wall GW190521 (announced) Phosphine detection in the atmosphere of Venus Water detection on the sunlit surface of the Moon Comets C/2019 Y4 (ATLAS) P/2019 LD2 (ATLAS) C/2017 T2 (PANSTARRS) C/2020 F8 (SWAN) C/2019 U6 (LEMMON) C/2020 F3 (NEOWISE) 2P/Encke 88P/Howell C/2020 M3 (ATLAS) 156P/Russell–LINEAR C/2020 S3 (Erasmus) Space exploration Spitzer retirement (Jan 2020) BepiColombo (Earth gravity assist; Apr 2020, Venus gravity assist; Oct 2020) OSIRIS-REx (sample collection from asteroid Bennu; Oct 2020) Hayabusa2 (sample return from asteroid Ryugu; Dec 2020) Chang'e 5 (lunar sample return; Dec 2020) Outer space portal Category:2019 in outer space — Category:2020 in outer space — Category:2021 in outer space

v t e Small Solar System bodies Minor planets Designation Groups List Moon Meanings of names Asteroid Active Asteroid belt Family Jupiter trojan Near-Earth Amors Apollos Atens Atiras Spectral types Distant minor planet Centaur Neptune trojan Damocloid Trans-Neptunian object Detached Kuiper belt Oort cloud Scattered disc Comets Extinct Great Halley-type Hyperbolic/Parabolic Long-period Lost Near-parabolic Periodic Sungrazing Other Cosmic dust Meteoroids Space debris

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Adapted from the Wikipedia article [2020 UA](https://en.wikipedia.org/wiki/2020_UA) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/2020_UA?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.