Minor Planet Radar Database
  Return to list of asteroid radar detections  

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
                 [edit]

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO418209 (heliocentric ecliptic J2000)
Element Value Units
e 0.2614125
a 1.118609 AU
i 9.27511 deg
om 85.84128 deg
w 107.99151 deg
ma 256.62111 deg
n 0.83307978 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
2010-01-06 13:52:00 0.12586 125.6 8.7
2010-09-27 21:53:00 0.44754 446.6 0.1
2011-07-18 23:20:00 0.38390 383.1 0.2
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

Link to complete Close-Approach Data on SBDB at JPL