Asteroid Radar Database
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438908 (2009 XO)
Classification: APO [NEO, PHA]
H:20.63 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2020 May 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 MPO713000 (heliocentric ecliptic J2000)
Element Value Units
e 0.543589
a 1.8584992 AU
i 0.34905 deg
om 27.93441 deg
w 140.55246 deg
ma 209.7524 deg
n 0.38900977 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
2015-03-05 00:23:00 0.14155 141.3 2.3
2020-05-07 12:19:00 0.02268 22.6 1269.9
2025-06-04 06:17:00 0.44281 441.9 0.0

Link to complete Close-Approach Data on SBDB at JPL