Asteroid Radar Database
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101 Helena
Classification:  []
H:8.23 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2001 Oct Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
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Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO660785 (heliocentric ecliptic J2000)
Element Value Units
e 0.141187
a 2.5838046 AU
i 10.19779 deg
om 343.38324 deg
w 348.31226 deg
ma 350.73523 deg
n 0.23730919 deg/d

Link to complete orbital information at Minor Planet Center