Asteroid Radar Database
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226554 (2003 WR21)
Classification: APO [NEO, PHA]
H:19.5 mag, G:0.15

  MPC page for this object   |  JPL SBDB page for this object   |  NEODyS-2 page for this object   |  ESA SSA page for this object  

History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2017 Jun Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
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Orbital Elements at Epoch 2021-07-05 00:00 TT from MPO418209 (heliocentric ecliptic J2000)
Element Value Units
e 0.2614328
a 1.1184822 AU
i 9.27465 deg
om 85.83457 deg
w 107.98373 deg
ma 203.16829 deg
n 0.83322146 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
2016-11-14 21:24:00 0.37980 379.0 0.2
2017-06-07 19:17:00 0.12160 121.4 9.8
2023-01-09 13:59:00 0.07254 72.4 58.9
2023-09-19 00:06:00 0.43674 435.9 0.1
2024-07-22 14:57:00 0.46989 469.0 0.1
2029-11-08 09:24:00 0.40036 399.6 0.1
2030-06-20 05:07:00 0.06515 65.0 85.4

Link to complete Close-Approach Data on SBDB at JPL