Minor Planet Radar Database
  Return to list of asteroid radar detections  

3361 Orpheus (1982 HR)
Classification: APO [NEO, PHA]
H:19.03 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 Nov Goldstone Goldstone 8560 [G]

Radar-Based Physical Properties
                 [edit]

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO458863 (heliocentric ecliptic J2000)
Element Value Units
e 0.322927
a 1.210293 AU
i 2.67754 deg
om 189.18063 deg
w 301.87531 deg
ma 344.19601 deg
n 0.74023274 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
2009-12-25 18:31:00 0.13835 138.1 2.9
2010-06-04 16:35:00 0.40182 401.0 0.1
2013-12-07 00:11:00 0.10316 103.0 8.0
2014-06-09 19:36:00 0.42708 426.2 0.1
2017-11-25 16:30:00 0.06072 60.6 50.3
2018-06-14 04:37:00 0.44832 447.4 0.1
2021-11-21 19:20:00 0.03856 38.5 239.9
2022-06-17 00:25:00 0.46160 460.7 0.0
2025-11-19 01:27:00 0.03792 37.8 253.9
2026-06-19 21:23:00 0.47295 472.0 0.0

Link to complete Close-Approach Data on SBDB at JPL