Minor Planet Radar Database
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144901 (2004 WG1)
Classification: APO [NEO]
H:17.4 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2006 Apr 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 0.17 0.01 2008Icar..198..294B Date: 2006T

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO366811 (heliocentric ecliptic J2000)
Element Value Units
e 0.5215336
a 1.639878 AU
i 13.04182 deg
om 42.02021 deg
w 232.43062 deg
ma 52.63166 deg
n 0.46933914 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
2010-09-29 18:06:00 0.39627 395.5 2.3
2027-04-17 18:37:00 0.06492 64.8 1229.5
2029-07-24 11:00:00 0.28660 286.0 7.0

Link to complete Close-Approach Data on SBDB at JPL