Asteroid Radar Database
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199003 (2005 WJ56)
Classification: ATE [NEO, PHA]
H:18.16 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2008 Jan Arecibo Arecibo 2380 [A]
2008 Jan Goldstone Goldstone 8560 [G]

Radar-Based Physical Properties
name symbol value units uncertainty reference notes
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 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
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 0.92 0.15 2008Icar..198..294B

Orbital Elements at Epoch 2024-03-31 00:00 TT from E2024-C06 (heliocentric ecliptic J2000)
Element Value Units
e 0.1521048
a 0.9590321 AU
i 21.61516 deg
om 288.0185 deg
w 297.65214 deg
ma 357.19607 deg
n 1.04943213 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
2021-08-05 14:45:00 0.22990 229.4 2.4
2022-06-29 14:31:00 0.19476 194.4 4.3
2023-01-08 16:16:00 0.16833 168.0 7.1
2024-01-07 02:32:00 0.19953 199.1 4.0

Link to complete Close-Approach Data on SBDB at JPL