Minor Planet Radar Database
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(2012 MS4)
Classification: APO [NEO, PHA]
H:18.7 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2018 Dec Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
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Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO477672 (heliocentric ecliptic J2000)
Element Value Units
e 0.7203615
a 2.2649402 AU
i 67.67462 deg
om 265.83994 deg
w 257.6336 deg
ma 24.29246 deg
n 0.28914719 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
2012-06-11 01:20:00 0.21238 212.0 2.1
2018-12-20 21:57:00 0.08188 81.7 58.0
2029-06-17 12:22:00 0.21534 214.9 2.0

Link to complete Close-Approach Data on SBDB at JPL