Asteroid Radar Database
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89136 (2001 US16)
Classification: AMO [NEO, PHA]
H:20.2 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
2004 Apr Arecibo Arecibo 2380 [A]
2004 Apr 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 0.39 0.05 2008Icar..198..294B Date: 2004T

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO545576 (heliocentric ecliptic J2000)
Element Value Units
e 0.2528242
a 1.3561271 AU
i 1.90565 deg
om 175.91341 deg
w 67.16428 deg
ma 68.40635 deg
n 0.62409903 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 00:34:00 0.33744 336.8 0.3
2015-07-16 07:38:00 0.22857 228.1 1.1
2023-04-03 06:18:00 0.33110 330.4 0.3
2023-09-01 15:55:00 0.39802 397.2 0.1

Link to complete Close-Approach Data on SBDB at JPL