Minor Planet Radar Database
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16834 (1997 WU22)
Classification: APO [NEO]
H:15.6 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2000 Aug 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 0.2 0.10 2008Icar..198..294B Date: 2000T

Orbital Elements at Epoch 2019-04-27 00:00 TT from MPO467882 (heliocentric ecliptic J2000)
Element Value Units
e 0.4421685
a 1.4679854 AU
i 15.9905 deg
om 260.79754 deg
w 334.32569 deg
ma 219.20793 deg
n 0.55414253 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
2016-07-27 17:47:00 0.24870 248.2 9.5
2025-04-29 17:59:00 0.24788 247.4 9.6

Link to complete Close-Approach Data on SBDB at JPL