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

Orbital Elements at Epoch 2021-07-05 00:00 TT from MPO636061 (heliocentric ecliptic J2000)
Element Value Units
e 0.140874
a 2.5826865 AU
i 10.19761 deg
om 343.38443 deg
w 348.41328 deg
ma 303.15604 deg
n 0.23746332 deg/d

Link to complete orbital information at Minor Planet Center