Asteroid Radar Database
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4953 (1990 MU)
Classification: APO [NEO, PHA]
H:15.02 mag, G:0.15

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History of Radar Detections
Year Month Transmitter Receiver Frequency Obs
1994 May 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 0.36 0.03 2008Icar..198..294B Date: 1994T

Orbital Elements at Epoch 2022-01-21 00:00 TT from MPO660785 (heliocentric ecliptic J2000)
Element Value Units
e 0.6575434
a 1.6216169 AU
i 24.37587 deg
om 77.64222 deg
w 77.82739 deg
ma 167.6477 deg
n 0.47728927 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
2016-11-07 19:28:00 0.39026 389.5 6.1
2018-11-29 10:38:00 0.10683 106.6 555.0
2021-01-07 06:33:00 0.39527 394.5 5.8
2025-05-16 20:09:00 0.38253 381.8 6.5
2027-06-06 22:43:00 0.03083 30.8 40294.8
2029-06-24 23:17:00 0.41391 413.1 4.9

Link to complete Close-Approach Data on SBDB at JPL