Asteroid Radar Database
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490581 (2009 WZ104)
Classification: ATE [NEO, PHA]
H:20.85 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
2013 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 2024-03-31 00:00 TT from MPO700746 (heliocentric ecliptic J2000)
Element Value Units
e 0.192692
a 0.8552832 AU
i 9.83524 deg
om 263.24832 deg
w 10.56037 deg
ma 182.29804 deg
n 1.24606057 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
2017-07-23 18:40:00 0.32504 324.4 0.2
2018-01-19 23:14:00 0.36432 363.6 0.2
2020-12-04 00:42:00 0.48076 479.8 0.1
2021-06-16 21:59:00 0.32442 323.8 0.2
2024-11-27 13:43:00 0.21956 219.1 0.9
2025-05-09 18:08:00 0.29730 296.7 0.3
2028-12-14 02:15:00 0.03196 31.9 747.9
2032-08-21 00:07:00 0.30408 303.5 0.3
2033-01-20 06:17:00 0.20275 202.3 1.2

Link to complete Close-Approach Data on SBDB at JPL