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2020 UA
Discovery
Discovered by	Mount Lemmon Survey
Discovery site	Mt. Lemmon Obs.
Discovery date	16 October 2020
Designations
MPC designation	2020 UA
Alternative designations	C3K1WP2
Minor planet category	NEO · Aten
Orbital characteristics
	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
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)
Apparent magnitude	20.8 (at discovery)
Absolute magnitude (H)	28.39±0.38; 28.43

2020 UA is a tiny 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.^[5]

References

^ ^a ^b "MPEC 2020-U52 : 2020 UA". Minor Planet Electronic Circular. Minor Planet Center. 17 October 2020. Retrieved 19 January 2021.
^ ^a ^b "2020 UA". Minor Planet Center. International Astronomical Union. Retrieved 19 January 2021.
^ "2020 UA". NEO Exchange. Las Cumbres Observatory. 19 October 2020. Retrieved 19 January 2021.
^ Gray, Bill (17 October 2020). ""Pseudo-MPEC" for C3K1WP2". Project Pluto. Retrieved 19 January 2021.
^ ^a ^b ^c ^d ^e "JPL Small-Body Database Browser: 2020 UA" (2020-10-20 last obs.). Jet Propulsion Laboratory. Retrieved 19 January 2021.
^ Bruton, Dan. "Conversion of Absolute Magnitude to Diameter for Minor Planets". Department of Physics, Engineering, and Astronomy. Stephen F. Austin State University. Archived from the original on 23 July 2011. Retrieved 19 January 2021.