Asteroid Radar Database
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(2015 OQ21)
Classification: ATE [NEO]
H:27.9 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2015 Jul Arecibo Arecibo 2380 [A]

Radar-Based Physical Properties
                 [edit]
name symbol value units uncertainty reference notes
morphology
number of components N
morphological type
spectrum-based or image-based dimensions
maximum range extent Rmax km
minimum range extent Rmin km
maximum Doppler bandwidth Bmax Hz
minimum Doppler bandwidth Bmin Hz
effective diameter Deff km
quality code for size Q
shape-based dimensions
equivalent diameter Dequ km
extent along principal axis x Ex km
extent along principal axis y Ey km
extent along principal axis z Ez km
DEEVE extent along x Dx km
DEEVE extent along y Dy km
DEEVE extent along z Dz km
surface area A km2
volume V km3
spin
spin period Pspin h
spin rate ω deg/day
YORP acceleration ω̇ deg/day2
spin axis ecliptic longitude λ deg
spin axis ecliptic latitude β deg
reflectivity
radar cross-section OC σOC km2
radar cross-section SC σSC km2
radar cross-section σT km2
projected area Aproj km2
radar albedo OC σ̂OC
radar albedo SC σ̂SC
radar albedo σ̂T
circular polarization ratio μC

Orbital Elements at Epoch 2024-10-17 00:00 TT from MPO344195 (heliocentric ecliptic J2000)
Element Value Units
e 0.3640484
a 0.7894819 AU
i 1.60714 deg
om 125.45862 deg
w 328.71503 deg
ma 291.32371 deg
n 1.4050468 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
2015-04-03 19:14:00 0.31698 316.3 0.0
2015-07-24 00:00:00 0.00380 3.8 0.0
2017-05-31 09:55:00 0.32086 320.2 0.0
2017-11-13 03:17:00 0.44512 444.2 0.0
2020-01-15 19:26:00 0.47241 471.5 0.0
2022-07-12 01:44:00 0.04692 46.8 0.8
2024-06-02 17:54:00 0.39043 389.7 0.0
2024-11-20 22:14:00 0.45768 456.8 0.0
2027-01-23 07:26:00 0.46402 463.1 0.0
2027-07-16 18:01:00 0.43806 437.2 0.0
2029-06-24 21:02:00 0.06178 61.7 0.3
2031-06-06 01:45:00 0.44826 447.4 0.0
2031-11-27 21:39:00 0.46591 465.0 0.0
2034-01-28 16:37:00 0.45655 455.6 0.0
2034-07-18 13:32:00 0.38811 387.3 0.0

Link to complete Close-Approach Data on SBDB at JPL