Minor Planet Radar Database
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(2011 UK21)
Classification: APO [NEO]
H:25.2 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2011 Oct Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
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Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO210179 (heliocentric ecliptic J2000)
Element Value Units
e 0.4264987
a 1.7076697 AU
i 7.64696 deg
om 33.03687 deg
w 23.42699 deg
ma 121.61531 deg
n 0.44167037 deg/d

Link to complete orbital information at Minor Planet Center

Earth Close-Approach Data (+/- 10 years)
date nominal distance RTT SNR/run at Arecibo
2011-10-23 00:52:00 0.02855 28.5 26.1
2020-12-16 09:27:00 0.14129 141.0 0.1

Link to complete Close-Approach Data on SBDB at JPL