Asteroid 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

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO210179 (heliocentric ecliptic J2000)
Element Value Units
e 0.4260729
a 1.7074605 AU
i 7.64261 deg
om 32.98425 deg
w 23.50059 deg
ma 203.16729 deg
n 0.44175153 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
2020-12-16 12:30:00 0.14190 141.6 0.1
2030-01-11 13:04:00 0.39831 397.5 0.0

Link to complete Close-Approach Data on SBDB at JPL