Asteroid Radar Database
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(2012 WH1)
Classification: ATE [NEO]
H:23.9 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2012 Dec 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 2020-05-31 00:00 TT from MPO307055 (heliocentric ecliptic J2000)
Element Value Units
e 0.336407
a 0.8173925 AU
i 4.61165 deg
om 64.03866 deg
w 147.14391 deg
ma 295.93745 deg
n 1.33369983 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
2012-07-06 16:32:00 0.36151 360.8 0.0
2012-11-29 09:32:00 0.01954 19.5 226.5
2015-06-03 10:52:00 0.43341 432.5 0.0
2015-11-29 15:53:00 0.22771 227.3 0.1
2018-05-06 03:58:00 0.46195 461.0 0.0
2018-11-19 15:06:00 0.48114 480.2 0.0
2020-09-27 20:20:00 0.40360 402.8 0.0
2021-04-08 11:02:00 0.45753 456.6 0.0
2023-09-20 06:26:00 0.15657 156.3 0.2
2024-03-09 04:45:00 0.41572 414.9 0.0
2026-10-13 04:15:00 0.10258 102.4 0.8
2027-01-23 06:06:00 0.30409 303.5 0.0
2029-06-30 08:03:00 0.37808 377.3 0.0
2029-12-02 03:24:00 0.02453 24.5 105.7

Link to complete Close-Approach Data on SBDB at JPL