Asteroid Radar Database
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(1998 SD9)
Classification: ATE [NEO]
H:24.09 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
2018 Aug Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
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Orbital Elements at Epoch 2025-05-05 00:00 TT from MPO659745 (heliocentric ecliptic J2000)
Element Value Units
e 0.5043933
a 0.7024724 AU
i 2.98735 deg
om 165.74725 deg
w 7.70305 deg
ma 258.24813 deg
n 1.67401804 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
2015-08-30 10:27:00 0.28919 288.6 0.0
2018-08-29 07:29:00 0.01083 10.8 1336.9
2021-10-06 19:53:00 0.02718 27.1 65.7
2024-10-04 07:14:00 0.30624 305.6 0.0
2025-09-01 12:54:00 0.35547 354.8 0.0
2028-08-25 23:42:00 0.06009 60.0 4.3
2028-12-13 15:39:00 0.45301 452.1 0.0
2031-10-01 17:48:00 0.03340 33.3 32.6
2034-10-07 06:48:00 0.23551 235.0 0.0

Link to complete Close-Approach Data on SBDB at JPL